Calculators

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Age Calculator

Calculate your exact age in years, months, days, hours and more.

Date Difference Calculator

Find the number of days, weeks and months between two dates.

Days Until Calculator

Count down the days remaining until any date.

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BMI Calculator

Calculate your Body Mass Index and healthy weight range.

BMR Calculator

Calculate your Basal Metabolic Rate and daily calorie needs.

Water Intake Calculator

Estimate how much water you should drink daily.

Ideal Weight Calculator

Find your ideal body weight using the Devine formula.

Heart Rate Zone Calculator

Find your training heart-rate zones from your age.

Sleep Cycle Calculator

Find the best times to fall asleep based on 90-minute sleep cycles.

Pregnancy Due Date Calculator

Estimate your due date from your last period.

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Percentage Calculator

Calculate percentages, shares and percentage change in one place.

Percentage Change Calculator

Calculate the percentage increase or decrease between two values.

Average Calculator

Find the mean, median, sum and standard deviation of a list of numbers.

Number to Words Converter

Convert numbers to words in international and Indian formats.

Roman Numeral Converter

Convert numbers from 1 to 3999 into Roman numerals.

Binary Decimal Converter

Convert between binary, decimal, hex and octal.

Prime Number Checker

Check whether any number is prime.

LCM and HCF Calculator

Find the LCM and HCF (GCD) of two numbers.

Quadratic Equation Solver

Solve ax² + bx + c = 0 including complex roots.

Random Number Generator

Generate a cryptographically random number in any range.

Dice Roller

Roll up to 20 virtual dice with any number of sides.

Coin Flip

Flip one or many virtual coins.

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Love Calculator

A fun compatibility score between two names.

Ohms Law Calculator

Calculate voltage, current, resistance or power from any two values.

Area Calculator

Calculate the area and perimeter of a rectangle.

Paint Calculator

Estimate how much paint you need for a wall area.

Tile Calculator

Calculate how many tiles you need including 10% wastage.

Ratio Calculator

Solve proportions (A:B = C:?) and simplify ratios.

Aspect Ratio Calculator

Find the aspect ratio of any size and scale dimensions proportionally.

Fraction to Decimal Calculator

Convert any fraction to a decimal and percentage, and simplify it.

Permutation & Combination Calculator

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

Scientific Notation Converter

Convert any number to scientific (and E) notation, and back.

Dog Age Calculator

Convert your dog's age into human years with a more accurate modern formula.

Height Converter (cm ↔ feet/inches)

Convert height between centimetres and feet/inches, either direction.