Health

Body Fat Calculator

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

Finance

Loan EMI Calculator

Calculate your monthly EMI for home, car, or personal loans. See total interest and paymen

Ecology

Electricity Cost Calculator

Calculate the electricity cost of any appliance based on wattage, daily usage hours, and t

Health

Calorie Calculator

Calculate your daily calorie needs (TDEE) based on age, weight, height and activity level.

Math

Percentage Calculator

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

Pregnancy

Heart Rate Zone Calculator

Calculate your 5 heart rate training zones based on your age or custom max heart rate.

Everyday

Date Difference Calculator

Enter a start date and end date to calculate the difference in days. Perfect for planning

Health

Body Fat Percentage Calculator

Estimate body fat percentage using the US Navy method for men and women.

Everyday

Power Consumption Calculator

Calculate total household power consumption in kWh and estimate monthly electricity bill f

Everyday

Data Storage Converter

Convert between bytes, KB, MB, GB, TB and more. Essential for developers and IT profession

Everyday

Aspect Ratio Calculator

Calculate missing width or height from an aspect ratio, or find the ratio of any image or

Finance

Profit Margin Calculator

Calculate gross profit margin, net profit margin, markup percentage, and selling price fro

Physics

Ohm's Law Power Calculator

Calculate electrical power in watts from voltage and current, or derive any missing electr

Pregnancy

Body Surface Area Calculator

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

Finance

Discount Calculator

Calculate the final price after discount, the discount amount, and the percentage saved on

Date & Time

Age Calculator

Calculate your exact age in years, months and days from your date of birth.

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

Physics

Ohm's Law Calculator

Calculate voltage, current, resistance or power using Ohm's Law. Solve for any electrical

Finance

Salary Calculator

Convert between hourly, daily, weekly, monthly and annual salary. Calculate take-home pay

Math

Markup Calculator

Calculate selling price, markup percentage, and profit from cost price and desired markup

Finance

ROI Calculator

Calculate Return on Investment (ROI) percentage and net profit from your investment data.

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.

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

Math

Average Revenue Per User Calculator

Calculate Average Revenue Per User (ARPU), MRR, ARR and revenue growth metrics for SaaS an

Physics

Ohm Law Capacitor Charge Calculator

Calculate the charge, energy stored, and voltage across a capacitor given capacitance and

Pregnancy

Creatinine Clearance Calculator

Estimate kidney function (GFR) using the Cockcroft-Gault equation from age, weight, and se

Finance

Anemia Risk Calculator

Assess anemia risk by checking hemoglobin levels against WHO reference ranges by age and g

Pregnancy

Gestational Age Calculator

Calculate gestational age in weeks and days from the last menstrual period (LMP) or ultras

Date & Time

Lunar Age Calculator

Calculate your age according to the traditional lunar calendar used in Chinese, Korean and

Math

Margin of Safety Calculator

Calculate the margin of safety in units, revenue and percentage for any business to measur

Math

Churn Rate Calculator

Calculate monthly and annual customer churn rate, retention rate, and average customer lif

Pregnancy

Calorie Intake by Age Calculator

Find the recommended daily calorie intake for children, teens and adults based on age, gen

Construction

Paint Coverage Calculator

Calculate how much paint you need to cover walls, ceilings or any surface area for your pr

Food

Coffee Caffeine Calculator

Calculate your total daily caffeine intake from coffee, tea and other beverages and check

Everyday

Dog Age Calculator

Convert your dog age to human years based on size and breed group for a more accurate comp

Health

Sleep Hours Calculator

Calculate the recommended sleep duration by age and find the optimal bedtime or wake-up ti

Everyday

Tip Split Calculator

Calculate tip amount and split the total bill among any number of people with custom tip p

Engineering

Tank Volume Calculator

Calculate the volume and capacity of cylindrical, rectangular and horizontal tanks in gall

Business

Shipping Cost Calculator

Estimate shipping costs based on package weight, dimensions and shipping zone.

Everyday

Electricity Bill Splitter

Split your electricity bill fairly among roommates or household members based on usage or

Math

GPA Calculator

Calculate your semester GPA and cumulative GPA based on course grades and credit hours.