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Convert between metric and imperial units instantly. Length, weight, temperature, volume, and more.
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Quick conversions:
The metric system (SI units) uses base-10 relationships. Prefixes like kilo- (1000), centi- (1/100), and milli- (1/1000) make conversions simple. Used by most countries worldwide.
Examples:
1 km = 1,000 m = 100,000 cm
The imperial system uses units like feet, pounds, and gallons. Primarily used in the US and partially in the UK. Conversions often involve irregular numbers.
Examples:
1 mile = 5,280 ft = 1,760 yd
Celsius is based on water's freezing (0°C) and boiling (100°C) points. Fahrenheit uses 32°F and 212°F. Kelvin starts at absolute zero (−273.15°C).
Formulas:
°F = °C × 1.8 + 32
Digital storage uses binary (base-2) prefixes. 1 KB = 1,024 bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB. Different from SI prefixes which use 1,000.
Conversion:
1 GB = 1,024 MB = 1,073,741,824 bytes
1 mile = 1.609344 kilometers. This is an exact conversion factor.
Subtract 32, then multiply by 5/9. Example: 100°F = (100-32) × 5/9 = 37.78°C.
1 kilogram = 2.205 pounds. To convert kg to lbs, multiply by 2.205.
US gallon = 3.785 liters. UK (imperial) gallon = 4.546 liters. The UK gallon is about 20% larger.
1 meter = 3.281 feet (approximately). 1 foot = 0.3048 meters (exactly).
Absolute zero = 0 K = −273.15°C = −459.67°F. This is the lowest theoretically possible temperature.
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