📋 All Calculators

200 calculators

Math
Budget Planner Calculator
Plan your monthly budget by entering income and expense categories to see your surplus or
Math
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases instantly.
Health
Body Fat Calculator
Estimate your body fat percentage using the US Navy method based on waist, neck, and heigh
Date & Time
Time Zone Converter
Convert time between major world time zones instantly. Plan international meetings and cal
Math
VAT Calculator
Calculate VAT amount and price including or excluding VAT for any rate.
Everyday
Speed Distance Time Calculator
Calculate speed, distance, or time from any two known values. Supports km/h, mph, and m/s.
Finance
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and assess your health risk category based on WHO guidel
Everyday
Tip Calculator
Calculate tip amount and split the bill between multiple people easily.
Everyday
Speed of Sound Calculator
Calculate the speed of sound in air at any temperature, and convert between Mach and m/s.
Physics
Gravitational Potential Energy Calculator
Calculate gravitational potential energy using mass, gravity, and height. Essential physic
Health
Water Intake Calculator
Calculate your recommended daily water intake based on your weight, activity level and cli
Finance
Simple Interest Calculator
Calculate simple interest on a principal amount for a given time period and rate.
Finance
GST Calculator
Calculate GST (Goods and Services Tax) amount, add GST to a price, or remove GST from a pr
Finance
Loan EMI Calculator
Calculate your monthly EMI for home, car, or personal loans. See total interest and paymen
Finance
Break-Even Calculator
Calculate your break-even point in units and revenue. Know exactly when your business beco
Ecology
Electricity Cost Calculator
Calculate the electricity cost of any appliance based on wattage, daily usage hours, and t
Date & Time
Business Days Calculator
Count the number of working days between two dates, excluding weekends and optional public
Math
Fraction Calculator
Add, subtract, multiply and divide fractions. Get results in simplified form with step-by-
Business
Break-Even Point Calculator
Calculate the break-even point in units and revenue for any product or business.
Pregnancy
Ovulation Calculator
Calculate your ovulation date and fertile window based on your last period and cycle lengt
Finance
One Rep Max Calculator
Estimate your one-rep max (1RM) for any lift using weight lifted and number of reps perfor
Ecology
Carbon Footprint Calculator
Estimate your personal carbon footprint from transportation, energy use, diet and lifestyl
Everyday
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers instantly. Supports values from 1 to 399
Finance
SIP Calculator
Calculate returns on your Systematic Investment Plan (SIP) and see how your monthly invest
Business
Expense to Income Ratio Calculator
Calculate your expense to income ratio to understand your financial health and spending ef
Chemistry
Boyle's Law Calculator
Calculate pressure or volume of a gas using Boyle's Law (P₁V₁ = P₂V₂) at constant temperat
Chemistry
Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles using the ideal gas law PV = nRT.
Health
Calorie Calculator
Calculate your daily calorie needs (TDEE) based on age, weight, height and activity level.
Math
Quadratic Equation Solver
Enter coefficients a, b, and c to solve a quadratic equation and calculate its real roots.
Physics
Kinetic Energy Calculator
Calculate the kinetic energy of a moving object using its mass and velocity. Instant physi
Unit Converter
Length Converter
Convert between all length and distance units — meters, feet, inches, miles, kilometers an
Finance
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation for accurate
Math
Depreciation Calculator
Calculate annual depreciation of an asset using straight-line or declining balance methods
Math
Inflation Calculator
Calculate the impact of inflation on purchasing power and the equivalent future or past va
Finance
Protein Intake Calculator
Calculate your daily protein requirement based on body weight, activity level, and fitness
Math
Percentage Calculator
Easily calculate percentages — find X% of Y, percentage change, or what percent X is of Y.
Finance
CAGR Calculator
Calculate Compound Annual Growth Rate (CAGR) to measure investment growth over time.
Chemistry
Stoichiometry Calculator
Calculate moles, mass, or molecules of reactants and products using stoichiometric ratios.
Everyday
Pace Calculator
Calculate running pace, finish time, or distance for any race from 5K to marathon.
Math
Stock Return Calculator
Calculate the total return, annualized return, and profit/loss from any stock investment.
Math
Invoice Total Calculator
Calculate invoice subtotal, tax, discount, and final total for billing and freelance work.
Pregnancy
Heart Rate Zone Calculator
Calculate your 5 heart rate training zones based on your age or custom max heart rate.
Date & Time
Countdown Timer Calculator
Calculate the exact days, hours, minutes and seconds remaining until any future date and t
Math
Savings Goal Calculator
Calculate how much you need to save per month to reach a financial goal within a set timef
Business
Emergency Fund Calculator
Calculate how much emergency fund you need based on monthly expenses and savings months ta
Everyday
Fuel Efficiency Converter
Convert fuel efficiency between MPG, L/100km, km/L and other units instantly.
Everyday
Hex Color Code Converter
Convert hex color codes to RGB, HSL and vice versa. Essential tool for designers and devel
Everyday
Date Difference Calculator
Enter a start date and end date to calculate the difference in days. Perfect for planning
Physics
Velocity Calculator
Enter the distance traveled and time taken to calculate the velocity of an object. Instant
Health
Body Fat Percentage Calculator
Estimate body fat percentage using the US Navy method for men and women.
Everyday
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and CM sizing systems for men and women.
Everyday
Fuel Cost Calculator
Calculate your fuel cost for a trip based on distance, fuel efficiency, and fuel price.
Everyday
Power Consumption Calculator
Calculate total household power consumption in kWh and estimate monthly electricity bill f
Date & Time
Working Days Calculator
Calculate the number of working days between two dates, excluding weekends and optional pu
Everyday
Data Storage Converter
Convert between bytes, KB, MB, GB, TB and more. Essential for developers and IT profession
Finance
Calories Burned Swimming Calculator
Estimate calories burned during swimming based on stroke, duration, and body weight.
Everyday
Aspect Ratio Calculator
Calculate missing width or height from an aspect ratio, or find the ratio of any image or
Chemistry
Molarity Calculator
Calculate the molarity of a solution using moles of solute and volume in liters.
Finance
Compound Interest Calculator
Calculate compound interest and see how your investment grows over time with the power of
Finance
Profit Margin Calculator
Calculate gross profit margin, net profit margin, markup percentage, and selling price fro
Physics
Torque Calculator
Calculate torque from force and lever arm length, or find force or distance given any two
Physics
Ohm's Law Power Calculator
Calculate electrical power in watts from voltage and current, or derive any missing electr
Chemistry
Molar Mass Calculator
Calculate the molar mass of common chemical elements and look up atomic weights instantly.
Finance
Currency Converter
Convert between major world currencies using real-time exchange rate logic. Covers USD, EU
Unit Converter
Weight Converter
Convert between kilograms, pounds, ounces, grams, stones and more weight units instantly.
Pregnancy
Body Surface Area Calculator
Calculate body surface area (BSA) using height and weight with Mosteller and DuBois formul
Statistics
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and more for a dataset.
Finance
Calorie Intake Calculator
Calculate your recommended daily calorie intake for weight loss, maintenance, or weight ga
Math
Rule of 72 Calculator
Use the Rule of 72 to estimate how long it takes to double your money at a given interest
Health
Ideal Weight Calculator
Calculate your ideal body weight based on height and gender using multiple popular formula
Finance
Discount Calculator
Calculate the final price after discount, the discount amount, and the percentage saved on
Finance
Pregnancy Weight Gain Calculator
Calculate recommended total and weekly weight gain during pregnancy based on pre-pregnancy
Physics
Wavelength Frequency Calculator
Calculate wavelength, frequency, or wave speed for any electromagnetic or sound wave.
Pregnancy
Due Date Calculator
Calculate your pregnancy due date from last menstrual period (LMP) or conception date. See
Math
Payback Period Calculator
Calculate the payback period of an investment — how many years to recover your initial cos
Physics
Circular Motion Calculator
Calculate centripetal force, acceleration, velocity and period for an object in circular m
Physics
Friction Force Calculator
Calculate friction force and normal force using the coefficient of friction and object mas
Chemistry
Concentration Calculator
Calculate solution concentration in molarity, mass/volume percent, and parts per million (
Pregnancy
Blood Pressure Checker
Check your blood pressure reading and classify it as normal, elevated, or hypertensive bas
Date & Time
Age Calculator
Calculate your exact age in years, months and days from your date of birth.
Finance
Cholesterol Ratio Calculator
Calculate total cholesterol to HDL ratio and LDL to HDL ratio to assess cardiovascular ris
Unit Converter
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine temperature scales instantly.
Chemistry
Empirical Formula Calculator
Find the empirical formula of a compound from the percentage composition of its elements.
Math
Mortgage Affordability Calculator
Calculate the maximum home loan you can afford based on your income, expenses, and interes
Construction
Volume Calculator
Calculate the volume of common 3D shapes: cube, sphere, cylinder, cone and rectangular pri
Math
Freelancer Rate Calculator
Calculate your ideal hourly or daily freelance rate based on desired annual income, expens
Math
Net Worth Calculator
Calculate your personal net worth by entering your assets and liabilities for a complete f
Finance
Vitamin D Calculator
Estimate your daily Vitamin D synthesis from sun exposure based on skin type, latitude, an
Everyday
Pressure Converter
Convert pressure between Pa, kPa, bar, psi, atm, mmHg and more instantly.
Date & Time
Time Duration Calculator
Calculate the total duration between two times in hours, minutes, and seconds. Supports ov
Math
Cryptocurrency Profit Calculator
Calculate profit or loss from a cryptocurrency trade based on buy price, sell price, and i
Math
Rental Yield Calculator
Calculate gross and net rental yield on a property investment based on rent, price, and ex
Math
Currency Exchange Profit Calculator
Calculate profit or loss from exchanging currency at two different rates.
Random
Password Generator
Generate strong, secure random passwords with custom length and character options.
Physics
Ohm's Law Calculator
Calculate voltage, current, resistance or power using Ohm's Law. Solve for any electrical
Finance
Calorie Burned Calculator
Estimate calories burned during various exercises based on your weight, activity, and dura
Everyday
Unit Price Calculator
Compare prices per unit to find the best deal when shopping. Compare two or more products
Business
Investment Growth Calculator
Calculate how your investment grows over time using compound interest.
Statistics
Mean Median Mode Calculator
Calculate mean, median, mode, range and standard deviation for a set of numbers.
Construction
Area Calculator
Calculate the area of common shapes: rectangle, circle, triangle, trapezoid and more.
Math
Debt Payoff Calculator
Calculate how long it will take to pay off a debt and total interest paid with fixed month
Physics
Projectile Motion Calculator
Calculate range, max height, and time of flight for a projectile given initial velocity an
Physics
Force Calculator
Enter mass (kg) and acceleration (m/s²) to calculate the force in Newtons (N) based on New
Health
BMI Calculator
Calculate your Body Mass Index (BMI) and find out if you are underweight, normal weight, o
Finance
Salary Calculator
Convert between hourly, daily, weekly, monthly and annual salary. Calculate take-home pay
Math
Pension Calculator
Estimate your retirement pension corpus and monthly income based on monthly contribution,
Construction
Concrete Volume Calculator
Calculate concrete volume in cubic metres and bags needed for slabs, columns, and footings
Sports
Cricket Strike Rate Calculator
Calculate your cricket strike rate to measure how quickly a batsman scores runs based on b
Chemistry
Half Life Calculator
Calculate the remaining quantity of a radioactive substance after a given time using half-
Math
Currency Exchange Calculator
Convert between major world currencies using customizable exchange rates.
Finance
Macro Nutrient Calculator
Calculate daily protein, carbohydrate, and fat targets based on your calorie goal and fitn
Math
Scientific Calculator
A fully functional scientific calculator with trigonometric, logarithmic, and advanced mat
Math
Markup Calculator
Calculate selling price, markup percentage, and profit from cost price and desired markup
Finance
VO2 Max Calculator
Estimate your VO2 max (maximal oxygen uptake) from a simple field test or resting heart ra
Chemistry
Molarity Dilution Calculator
Calculate the volume or concentration needed to dilute a stock solution using C1V1 = C2V2.
Finance
FD Calculator
Calculate maturity amount and interest earned on Fixed Deposits (FD) with different compou
Everyday
Binary to Decimal Converter
Convert between binary, decimal, hexadecimal, and octal number systems instantly.
Finance
ROI Calculator
Calculate Return on Investment (ROI) percentage and net profit from your investment data.
Food
Recipe Calorie Calculator
Calculate total and per-serving calories by adding ingredients with their quantities.
Math
GCD and LCM Calculator
Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of two or more
Date & Time
Add Days to Date Calculator
Add or subtract any number of days from a date to find a future or past date instantly.
Pregnancy
Sleep Cycle Calculator
Calculate optimal wake-up times based on sleep cycles to wake feeling refreshed and alert.
Everyday
Cooking Measurement Converter
Convert between cups, tablespoons, teaspoons, milliliters, liters, ounces, and grams for c
Everyday
Unit Converter
Convert between common units of length, weight, temperature, and volume in one handy tool.
Physics
Ohm Law Resistor Color Code Calculator
Decode 4-band and 5-band resistor color codes to find resistance value and tolerance.
Math
Prime Number Checker
Check if a number is prime and find all prime factors of any number instantly.
Chemistry
pH Calculator
Calculate the pH of a solution using the H⁺ ion concentration. Enter the concentration in
Business
Salary Increment Calculator
Calculate future salary growth based on yearly increment percentage.
Physics
Ohm Law Power Triangle Calculator
Calculate voltage, current, resistance, and power using any two known electrical values.
Ecology
Solar Panel Savings Calculator
Estimate your annual savings, payback period, and lifetime savings from installing solar p
Pregnancy
Fertile Window Calculator
Calculate your fertile window and most likely ovulation date based on your cycle length.
Everyday
Angle Converter
Convert angles between degrees, radians, gradians, and turns instantly.
Statistics
Z-Score Calculator
Calculate the Z-score of a data point and find the corresponding percentile rank.
Math
NPV Calculator
Calculate Net Present Value (NPV) of an investment by entering initial cost and yearly cas
Math
Accounts Receivable Turnover Calculator
Calculate accounts receivable turnover ratio and average collection period to assess busin
Pregnancy
Menstrual Cycle Calculator
Track your menstrual cycle, predict next period, and calculate average cycle length from p
Everyday
Logarithm Calculator
Calculate log base 10, natural log (ln), log base 2, and any custom base logarithm.
Math
Customer Lifetime Value Calculator
Calculate the Customer Lifetime Value (CLV) to understand the long-term revenue potential
Physics
Ohm Law Capacitor Charge Calculator
Calculate the charge, energy stored, and voltage across a capacitor given capacitance and
Everyday
Trigonometry Calculator
Calculate sin, cos, tan, asin, acos, atan and all trig values for any angle in degrees or
Everyday
Matrix Calculator
Add, subtract, multiply 2×2 and 3×3 matrices and calculate the determinant instantly.
Chemistry
Buffer Solution pH Calculator
Calculate the pH of a buffer solution using the Henderson-Hasselbalch equation.
Pregnancy
Creatinine Clearance Calculator
Estimate kidney function (GFR) using the Cockcroft-Gault equation from age, weight, and se
Finance
Intermittent Fasting Calculator
Calculate your eating window and fasting window start/end times for popular IF protocols l
Everyday
Perimeter Calculator
Calculate the perimeter of common shapes: square, rectangle, triangle, circle, and more.
Finance
Anemia Risk Calculator
Assess anemia risk by checking hemoglobin levels against WHO reference ranges by age and g
Date & Time
Calendar Week Number Calculator
Find the ISO week number of any date and see the start and end dates of that week.
Date & Time
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly. Supports current time
Finance
Pregnancy BMI Calculator
Calculate pre-pregnancy BMI and recommended weight gain range during pregnancy by trimeste
Everyday
Pythagorean Theorem Calculator
Calculate the hypotenuse or any missing side of a right triangle using the Pythagorean the
Ecology
Tree Planting CO2 Offset Calculator
Calculate how many trees you need to plant to offset your annual CO2 emissions.
Math
Cash Flow Calculator
Calculate monthly net cash flow, operating cash flow, and free cash flow for a business or
Everyday
Number to Words Converter
Convert any number up to one trillion into words in English. Useful for cheques, invoices,
Math
Profit and Loss Statement Calculator
Generate a simple profit and loss statement by entering revenue and expense line items.
Physics
Wavelength to Energy Calculator
Calculate the energy of a photon from its wavelength or frequency using E=hf and E=hc/λ.
Everyday
Permutation and Combination Calculator
Calculate nPr (permutations) and nCr (combinations) for any values of n and r.
Everyday
IP Subnet Calculator
Calculate network address, broadcast address, host range, and number of hosts for any IPv4
Everyday
Hex to Binary Converter
Convert hexadecimal numbers to binary, decimal and octal. Also convert binary or decimal t
Chemistry
Redox Reaction Balancer Guide
Calculate the oxidation state of elements in common chemical compounds and ions.
Math
Average Revenue Per User Calculator
Calculate Average Revenue Per User (ARPU), MRR, ARR and revenue growth metrics for SaaS an
Math
Commission Calculator
Calculate sales commission, total earnings, commission rate, and net pay for any commissio
Math
Payroll Tax Calculator
Calculate gross pay, tax deductions, and net take-home pay for employees with adjustable t
Math
Price Elasticity of Demand Calculator
Calculate price elasticity of demand (PED) and determine if demand is elastic, inelastic o
Pregnancy
Gestational Age Calculator
Calculate gestational age in weeks and days from the last menstrual period (LMP) or ultras
Everyday
Binary Calculator
Perform addition, subtraction, multiplication and division on binary numbers with step-by-
Math
Rule of 78 Loan Calculator
Calculate early loan payoff amount and interest rebate using the Rule of 78s method.
Date & Time
Lunar Age Calculator
Calculate your age according to the traditional lunar calendar used in Chinese, Korean and
Physics
Thermal Expansion Calculator
Calculate linear and volumetric thermal expansion of materials due to temperature change.
Everyday
Coordinate Distance Calculator
Calculate the distance between two points on a 2D or 3D coordinate plane using the distanc
Math
Cost Per Unit Calculator
Calculate cost per unit, total production cost, and unit profit margin for manufacturing o
Everyday
Statistical Probability Calculator
Calculate basic probability, complement, union and intersection of events from given outco
Math
Revenue Per Employee Calculator
Calculate revenue per employee, profit per employee, and headcount efficiency metrics for
Everyday
Exponent Calculator
Calculate exponents, powers, and roots. Supports any base and exponent including fractions
Math
Margin of Safety Calculator
Calculate the margin of safety in units, revenue and percentage for any business to measur
Everyday
Significant Figures Calculator
Round any number to a specified number of significant figures and identify sig figs in any
Finance
Pregnancy Trimester Calculator
Calculate which pregnancy trimester you are in and key milestones for each trimester.
Everyday
Percent Error Calculator
Calculate the percent error between an experimental value and a theoretical or accepted va
Finance
Target Heart Rate Calculator
Calculate your target heart rate training zones using the Karvonen formula with resting he
Pregnancy
Calorie Intake by Age Calculator
Find the recommended daily calorie intake for children, teens and adults based on age, gen
Physics
Newton Second Law Calculator
Calculate force, mass or acceleration using Newton's Second Law (F = ma). Solve for any mi
Finance
Hydration Tracker Calculator
Track your daily water intake and see how close you are to your hydration goal in real tim
Math
Churn Rate Calculator
Calculate monthly and annual customer churn rate, retention rate, and average customer lif
Physics
Snell Law Calculator
Calculate the angle of refraction using Snell's Law when light passes between two media wi
Engineering
Pipe Flow Rate Calculator
Calculate the volumetric flow rate through a pipe using pipe diameter and fluid velocity.
Finance
Lease Payment Calculator
Calculate your monthly lease payment based on vehicle price, residual value, money factor
Everyday
Love Compatibility Calculator
Calculate fun love compatibility score between two people based on their names and birth d
Everyday
Zodiac Sign Calculator
Find your Western zodiac sign and personality traits based on your date of birth.
Construction
Fence Calculator
Calculate the number of fence panels, posts and rails needed for any yard or property boun
Everyday
Electricity Bill Splitter
Split your electricity bill fairly among roommates or household members based on usage or
Construction
Paint Coverage Calculator
Calculate how much paint you need to cover walls, ceilings or any surface area for your pr
Construction
Tile Calculator
Calculate the number of tiles needed for any floor or wall area including waste factor.
Everyday
Dog Age Calculator
Convert your dog age to human years based on size and breed group for a more accurate comp
Everyday
Numerology Calculator
Calculate your Life Path Number, Expression Number and Soul Urge Number based on your name
Engineering
Bandwidth Calculator
Calculate network bandwidth, data transfer time and internet speed requirements for files
Science
Wind Chill Calculator
Calculate the feels-like temperature based on air temperature and wind speed using the off
Science
Dew Point Calculator
Calculate the dew point temperature from air temperature and relative humidity using the M
Food
Coffee Caffeine Calculator
Calculate your total daily caffeine intake from coffee, tea and other beverages and check
Everyday
Pool Volume Calculator
Calculate the volume of your swimming pool in gallons and liters based on shape and dimens
Construction
Mulch Calculator
Calculate how many bags or cubic yards of mulch you need to cover a garden bed or landscap
Construction
Concrete Mix Calculator
Calculate the ratio of cement, sand and gravel needed for different concrete mix grades an