Free Unit Converter

Convert between hundreds of measurement units instantly. Length, weight, volume, temperature, area, speed, and more — all in one tool. Fast and accurate conversions for everyday use.

Unit Converter

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How to Use the Unit Converter

Select a category, then choose the units you want to convert from and to. Enter the value and click Convert to see the result instantly. The converter supports both metric and imperial units across all categories.

Conversion Reference

Length: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1.609 km

Weight: 1 kg = 2.20462 lbs, 1 ounce = 28.3495 g

Volume: 1 gallon (US) = 3.78541 L, 1 fl oz = 29.5735 mL

Temperature: °C = (°F - 32) × 5/9

Frequently Asked Questions

Yes. All conversion factors use internationally accepted standard definitions based on the international yard definition and SI standard definitions.
Yes, the converter supports both metric and imperial units in every category — meters to feet, kilograms to pounds, liters to gallons, and more.
A US gallon equals 3.78541 liters, while a UK imperial gallon equals 4.54609 liters. This converter uses US liquid volume units.