Unit Converter

1 meter = 3.28084 feet. Conversely, 1 foot = 0.3048 meters. To convert meters to feet, multiply by 3.281. To convert feet to meters, multiply by 0.3048. Example: 5 meters = 5 × 3.281 = 16.404 feet.

1 kilogram = 2.20462 pounds. To convert kg to lbs, multiply by 2.205. To convert lbs to kg, divide by 2.205 (or multiply by 0.4536). Example: 70 kg = 70 × 2.205 = 154.3 lbs. Example: 150 lbs = 150 ÷ 2.205 = 68.04 kg.

1 mile = 1.60934 kilometers. 1 kilometer = 0.62137 miles. To convert miles to km, multiply by 1.609. To convert km to miles, multiply by 0.621. Example: 26.2 miles (marathon) = 42.2 km. Example: 100 km = 62.1 miles.

1 US gallon = 3.78541 liters. 1 liter = 0.26417 US gallons. Note: the UK (Imperial) gallon is larger at 4.54609 liters. This calculator uses the US gallon. Example: 5 gallons = 5 × 3.785 = 18.93 liters. A full gas tank of 15 gallons = 56.8 liters.

1 centimeter = 0.393701 inches. 1 inch = 2.54 centimeters. To convert cm to inches, divide by 2.54. To convert inches to cm, multiply by 2.54. Example: 180 cm = 180 ÷ 2.54 = 70.87 inches (5 feet 10.87 inches). Example: 6 feet = 72 inches = 72 × 2.54 = 182.88 cm.

The US gallon = 3.785 liters (128 fluid ounces). The UK (Imperial) gallon = 4.546 liters (160 fluid ounces). The UK gallon is about 20% larger than the US gallon. This matters for fuel economy: a car getting 40 mpg in the UK would get about 33 mpg by US standards — same car, different gallon size.

Multiply km/h by 0.62137 to get mph. Or divide by 1.60934. Example: 100 km/h = 100 × 0.621 = 62.1 mph. Example: 60 mph = 60 × 1.609 = 96.6 km/h. Quick mental trick: to roughly convert km/h to mph, divide by 1.6 (or multiply by 0.6).