Math

Budget Planner Calculator

Plan your monthly budget by entering income and expense categories to see your surplus or

Health

Body Fat Calculator

Estimate your body fat percentage using the US Navy method based on waist, neck, and heigh

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

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.

Physics

Kinetic Energy Calculator

Calculate the kinetic energy of a moving object using its mass and velocity. Instant physi

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

Math

Percentage Calculator

Easily calculate percentages — find X% of Y, percentage change, or what percent X is of Y.

Finance

Protein Intake Calculator

Calculate your daily protein requirement based on body weight, activity level, and fitness

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

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

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

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.

Statistics

Standard Deviation Calculator

Calculate population and sample standard deviation, variance, and more for a dataset.

Pregnancy

Body Surface Area Calculator

Calculate body surface area (BSA) using height and weight with Mosteller and DuBois formul

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 (

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

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

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.

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

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.

Physics

Ohm Law Resistor Color Code Calculator

Decode 4-band and 5-band resistor color codes to find resistance value and tolerance.

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.

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

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

Finance

Pregnancy BMI Calculator

Calculate pre-pregnancy BMI and recommended weight gain range during pregnancy by trimeste

Math

Payroll Tax Calculator

Calculate gross pay, tax deductions, and net take-home pay for employees with adjustable t

Everyday

Pythagorean Theorem Calculator

Calculate the hypotenuse or any missing side of a right triangle using the Pythagorean the

Everyday

Matrix Calculator

Add, subtract, multiply 2×2 and 3×3 matrices and calculate the determinant instantly.

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

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

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

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

Math

Accounts Receivable Turnover Calculator

Calculate accounts receivable turnover ratio and average collection period to assess busin

Everyday

Logarithm Calculator

Calculate log base 10, natural log (ln), log base 2, and any custom base logarithm.

Pregnancy

Menstrual Cycle Calculator

Track your menstrual cycle, predict next period, and calculate average cycle length from p

Everyday

Permutation and Combination Calculator

Calculate nPr (permutations) and nCr (combinations) for any values of n and r.

Date & Time

Calendar Week Number Calculator

Find the ISO week number of any date and see the start and end dates of that week.

Math

Customer Lifetime Value Calculator

Calculate the Customer Lifetime Value (CLV) to understand the long-term revenue potential

Everyday

IP Subnet Calculator

Calculate network address, broadcast address, host range, and number of hosts for any IPv4