Metric to Imperial Unit Converter

US Metric vs. Imperial System Guide

The United States is one of the few countries that primarily uses the Imperial System (often referred to as US Customary units). For many travelers, engineers, and scientists, converting these units to the globally standard Metric System is an everyday necessity.

Temperature is arguably the most common daily conversion. While the US uses Fahrenheit for weather and cooking, most scientific applications and other countries use Celsius. Key benchmarks include Freezing Point (0°C / 32°F), Room Temp (20°C / 68°F), and Boiling Point (100°C / 212°F).

Common Benchmarks

✓1 Inch = 2.54 Centimeters
✓1 Mile = 1.61 Kilometers
✓1 Pound = 0.45 Kilograms
✓1 Gallon = 3.78 Liters

Frequently Asked Questions

Why doesn't the US use the metric system?

The US actually metricated in 1975 under the Metric Conversion Act, but it was voluntary. Extensive industrial infrastructure and cultural habits have kept US Customary units as the primary system for consumer goods.

What is the difference between US liquid gallons and UK gallons?

A US Gallon is approximately 3.78 liters, while an Imperial (UK) Gallon is larger at 4.54 liters. This tool defaults to US Customary Liquid Gallons for our US audience.

Use Metric to Imperial Unit Converter in your browser

Fast and accurate unit conversion system. Specialized focus on Metric to Imperial conversions for weight, height, volume, and temperature for US users. It runs directly in your browser, so you can start straight away without creating an account or installing anything.

Simple to start

Open the workspace above, choose your options, and get the result when you need it.

Made for any screen

The controls are designed to stay usable on phones, tablets, and desktops.