Everyday Calculators

Find your exact age in years, months and days — plus total days lived and days until your next birthday.

Three percentage tools in one: X% of Y, X as a percentage of Y, and percentage change.

Count the exact days, weeks, months and years between any two dates — order doesn't matter.

Check your Body Mass Index in metric or imperial units, with the standard WHO category.

Spell out any whole number as words, in both the Indian (lakh/crore) and international (million/billion) systems.

Work out how much fuel a trip needs and what it will cost, from distance, mileage and fuel price.

Estimate your daily calorie needs — BMR and maintenance calories — using the Mifflin-St Jeor equation and your activity level.

Convert height between centimetres and feet/inches instantly, both ways.

Convert length between millimetres, centimetres, metres, kilometres, inches, feet, yards and miles.

Convert weight between milligrams, grams, kilograms, quintals, tonnes, pounds and ounces.

Convert between Celsius, Fahrenheit and Kelvin — edit any of the three linked fields.

Convert speed between kilometres/hour, miles/hour, metres/second and knots.

Convert exam marks to a percentage, or work out the marks needed for a target percentage.

Convert CGPA to percentage and back, using the CBSE 10-point-scale convention.

Generate one or many random integers in any range, with an optional no-repeats mode.

Find what day of the week any date falls on, plus its day-of-year, ISO week number and leap-year status.