Unit conversion category
Unit Conversion Calculators
Convert length, weight, temperature, volume, area, speed, time, energy and cooking measurements without digging through separate formulas.
Choose the right converter first
Unit conversion works best when the measurement type is clear. Length, area, volume, temperature and energy do not all convert the same way. This category keeps the converters separated so you do not accidentally convert square metres like metres, cups like grams or Celsius like a straight multiplication.
Use these tools for quick checks, product sizing, recipes, fitness notes, food labels, travel references and everyday comparisons. When the result affects safety, fit, compliance, medical decisions or official paperwork, use the calculator as a first check and confirm against the relevant source standard.
Conversion calculators
Read the unit conversion guide →Length Converter
Free length converter for metres, centimetres, millimetres, kilometres, inches, feet, yards and miles with formula notes and examples.
ConverterWeight Converter
Free weight converter for kilograms, grams, milligrams, tonnes, pounds, ounces and stone with formula notes and examples.
ConverterTemperature Converter
Free temperature converter for Celsius, Fahrenheit and Kelvin with formula notes, examples and common mistake checks.
ConverterVolume Converter
Free volume converter for millilitres, litres, cubic metres, teaspoons, tablespoons, cups, fluid ounces and gallons.
ConverterArea Converter
Free area converter for square metres, square centimetres, hectares, acres, square feet and other common area units.
ConverterSpeed Converter
Free speed converter for kilometres per hour, miles per hour, metres per second, feet per second and knots.
ConverterTime Converter
Free time converter for milliseconds, seconds, minutes, hours, days, weeks and years with examples and formula notes.
ConverterEnergy Converter
Free energy converter for joules, kilojoules, calories, kilocalories and watt-hours with nutrition and physics context.
ConverterCooking Measurement Converter
Free cooking measurement converter for Australian cups, tablespoons, teaspoons, millilitres, litres and US recipe measures.
Popular direct conversions
Conversion formulas guide →These pages cover the high-intent conversions people usually search directly. They are intentionally selective rather than a spammed list of every possible unit pair.
CM to Inches Converter
Centimetres to Inches with formula, examples, rounding notes and chart support.
Length conversionInches to CM Converter
Inches to Centimetres with formula, examples, rounding notes and chart support.
Length conversionMetres to Feet Converter
Metres to Feet with formula, examples, rounding notes and chart support.
Length conversionFeet to Metres Converter
Feet to Metres with formula, examples, rounding notes and chart support.
Length conversionKM to Miles Converter
Kilometres to Miles with formula, examples, rounding notes and chart support.
Length conversionMiles to KM Converter
Miles to Kilometres with formula, examples, rounding notes and chart support.
Weight conversionKG to LB Converter
Kilograms to Pounds with formula, examples, rounding notes and chart support.
Weight conversionLB to KG Converter
Pounds to Kilograms with formula, examples, rounding notes and chart support.
Weight conversionGrams to Ounces Converter
Grams to Ounces with formula, examples, rounding notes and chart support.
Weight conversionOunces to Grams Converter
Ounces to Grams with formula, examples, rounding notes and chart support.
Cooking conversionML to Cups Converter
Millilitres to Australian cups with formula, examples, rounding notes and chart support.
Cooking conversionCups to ML Converter
Australian cups to Millilitres with formula, examples, rounding notes and chart support.
Volume conversionLitres to Gallons Converter
Litres to US gallons with formula, examples, rounding notes and chart support.
Volume conversionGallons to Litres Converter
US gallons to Litres with formula, examples, rounding notes and chart support.
Temperature conversionCelsius to Fahrenheit Converter
Celsius to Fahrenheit with formula, examples, rounding notes and chart support.
Temperature conversionFahrenheit to Celsius Converter
Fahrenheit to Celsius with formula, examples, rounding notes and chart support.
Area conversionSquare Metres to Square Feet Converter
Square metres to Square feet with formula, examples, rounding notes and chart support.
Area conversionSquare Feet to Square Metres Converter
Square feet to Square metres with formula, examples, rounding notes and chart support.
Speed conversionKM/H to MPH Converter
Kilometres per hour to Miles per hour with formula, examples, rounding notes and chart support.
Speed conversionMPH to KM/H Converter
Miles per hour to Kilometres per hour with formula, examples, rounding notes and chart support.
Energy conversionKilojoules to Calories Converter
Kilojoules to food Calories with formula, examples, rounding notes and chart support.
Energy conversionCalories to Kilojoules Converter
food Calories to Kilojoules with formula, examples, rounding notes and chart support.
Cooking conversionTeaspoons to ML Converter
Teaspoons to Millilitres with formula, examples, rounding notes and chart support.
Cooking conversionTablespoons to ML Converter
Australian tablespoons to Millilitres with formula, examples, rounding notes and chart support.
Printable conversion charts
Downloadable charts make the conversion category more useful beyond the calculator itself. Use them for quick references, recipes, sizing checks and repeated comparisons.
Expert supporting articles
These guides explain the assumptions behind common conversions, where people get units wrong and when a rounded answer is not good enough.