How to use
- Choose a category such as length, weight or temperature.
- Enter a value and pick its unit — the value is shown in every other unit right away.
- Click any result to copy it. Your favorite units are remembered.
Good to know
Exact definitions are used: 1 inch = 2.54 cm, 1 pound = 0.45359237 kg and 1 mile = 1,609.344 m. Cups, spoons, pints and gallons follow US customary measures.
Temperature formulas: °C = (°F − 32) × 5/9 and K = °C + 273.15.
Storage makers use decimal units (1 GB = 1,000,000,000 bytes) while Windows shows binary units (1 GiB = 1,073,741,824 bytes). That’s why a 1 TB drive appears as about 931 GB.
FAQ
How many centimeters in an inch?
Exactly 2.54 cm.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. For example, 100°F ≈ 37.8°C.
What is a pyeong?
A Korean unit of area still used for apartments and offices. 1 pyeong = 400/121 m² ≈ 3.3058 m² ≈ 35.58 sq ft.
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