Health

Water Intake Calculator

Calculate your recommended daily water intake based on your weight, activity level and cli

Date & Time

Business Days Calculator

Count the number of working days between two dates, excluding weekends and optional public

Business

Break-Even Point Calculator

Calculate the break-even point in units and revenue for any product or business.

Physics

Kinetic Energy Calculator

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

Finance

Protein Intake Calculator

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

Physics

Velocity Calculator

Enter the distance traveled and time taken to calculate the velocity of an object. Instant

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.

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

Pregnancy

Due Date Calculator

Calculate your pregnancy due date from last menstrual period (LMP) or conception date. See

Pregnancy

Blood Pressure Checker

Check your blood pressure reading and classify it as normal, elevated, or hypertensive bas

Unit Converter

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin and Rankine temperature scales instantly.

Math

Debt Payoff Calculator

Calculate how long it will take to pay off a debt and total interest paid with fixed month

Finance

Salary Calculator

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

Sports

Cricket Strike Rate Calculator

Calculate your cricket strike rate to measure how quickly a batsman scores runs based on b

Finance

VO2 Max Calculator

Estimate your VO2 max (maximal oxygen uptake) from a simple field test or resting heart ra

Pregnancy

Sleep Cycle Calculator

Calculate optimal wake-up times based on sleep cycles to wake feeling refreshed and alert.

Math

Prime Number Checker

Check if a number is prime and find all prime factors of any number instantly.

Pregnancy

Fertile Window Calculator

Calculate your fertile window and most likely ovulation date based on your cycle length.

Pregnancy

Menstrual Cycle Calculator

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

Math

Payroll Tax Calculator

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

Finance

Intermittent Fasting Calculator

Calculate your eating window and fasting window start/end times for popular IF protocols l

Math

Customer Lifetime Value Calculator

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