Math Tools

Age, BMI, percentage, date, tip & fuel calculators.

Age Calculator

Calculate calendar age in years, months and days from a date of birth, with total days, weeks and whole-day hours.

Calculate your Body Mass Index (BMI) using metric or imperial units and see your weight category. Free BMI calculator.

Calculate percentages, percentage increase/decrease and what percent one number is of another. Free percentage calculator.

Calculate the number of days, weeks, months and years between two dates. Free date difference calculator online.

Calculate tip amount and split the bill between any number of people. Free tip and bill split calculator.

Calculate the fuel cost of a trip from distance, mileage and fuel price. Free petrol and diesel cost calculator for India.