Does this use US gallons or UK (imperial) gallons?

Volume conversions use the US gallon (3.785 liters), which differs from the UK imperial gallon (4.546 liters).

Unit Converter

Q: How accurate are the conversions?

Conversions use standard precise conversion factors and display up to 8 decimal places where relevant.

Convert length, weight, temperature and more between units

What is the Unit Converter?

The Unit Converter switches values between common units of length, weight, temperature, area, volume and speed — including both metric (km, kg, °C) and imperial/US customary units (miles, pounds, °F) used across the US, UK, Canada and Australia.

How to Use It

Pick a category — Length, Weight, Temperature, Area, Volume or Speed.
Enter a value and choose the "From" and "To" units.
Read the converted result — it updates instantly.

Popular Conversions

Length: miles ↔ kilometers, feet ↔ meters, inches ↔ centimeters
Weight: pounds ↔ kilograms, ounces ↔ grams
Temperature: Fahrenheit ↔ Celsius ↔ Kelvin
Volume: US gallons ↔ liters, cups ↔ milliliters

Frequently Asked Questions

Volume conversions use the US gallon (3.785 liters). The UK imperial gallon (4.546 liters) is a different unit — keep this in mind if converting recipes or fuel figures for a UK context.

Conversions use standard, precise conversion factors and display up to 8 decimal places for small or large results, so they're accurate for everyday, academic and professional use.