Unit Converters

Convert length, weight, temperature, data, and more.

Choose the quantity first, then enter a value and select source and destination units. Temperature needs its own formula, while length, area, volume, and weight use conversion factors. Check the displayed unit and precision before copying a result into technical work.

Read the practical guide for this category.

Numbers

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

Roman Numeral Converter

Convert numbers to Roman numerals and back, from 1 to 3999.

Length

Length Converter

Convert between metric and imperial length units.

Weight

Weight Converter

Convert between kilograms, pounds, ounces, grams and more.

Temperature

Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin.

Data

Data Storage Converter

Convert between bytes, KB, MB, GB, TB and binary units.

Volume

Volume Converter

Convert between liters, milliliters, gallons, cups and more.

Speed

Speed Converter

Convert between km/h, mph, m/s, knots and more.

Area

Convert between square meters, acres, hectares and more.

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