Unit Converters

Converters between the US customary units used at home and the metric units on labels, in science class and abroad: inches and centimeters, pounds and kilograms, miles and kilometers, Fahrenheit and Celsius. Each converter names the exact conversion factor.

• Conversions CM to Inches and Inches to CM Centimeters and millimeters to inches and back, with TV screen sizes in cm.
• Conversions KG to LBS Converter Kilograms to pounds and pounds to kilograms with the exact factor, plus a chart.
• Conversions CM to Feet and Inches Centimeters and meters to feet and inches and back, with a height chart.
• Conversions Fahrenheit to Celsius Converter °F to °C and °C to °F with the exact formula, plus a chart for weather, fever and cooking.
• Conversions MPH to KM/H and KM/H to MPH Miles per hour to km/h and back with the exact factor, plus a speed chart.
• Conversions KM to Miles Converter Kilometers to miles and miles to kilometers with the exact factor, plus race distances.
• Conversions Gallons to Liters and Liters to Gallons US gallons to liters and back, plus UK imperial and US dry gallons, with charts.

How to choose: pick the converter for the kind of quantity you have. For length, use inches to centimeters for small measurements and screen sizes, feet and inches to centimeters for height, and kilometers to miles for distances. For weight, use kilograms to pounds. For volume, the gallons to liters converter handles US, UK imperial and US dry gallons. For speed, use mph to km/h, and for temperature, Fahrenheit to Celsius. Every converter works in both directions and uses the exact factor where one is defined, such as 1 inch = 2.54 cm and 1 pound = 0.45359237 kg. The charts on each page list common values you can read without typing.