Handy conversions
| Conversion | Value |
|---|---|
| 1 inch | 2.54 cm (exactly) |
| 1 foot | 30.48 cm |
| 1 mile | 1.609 km |
| 1 pound | 0.4536 kg |
| 1 stone | 14 lb (6.35 kg) |
| °F → °C | (°F − 32) × 5 ÷ 9 |
| 1 US gallon | 3.785 L |
| 1 square meter | 10.764 sq ft |
US and UK units differ
A US gallon is 3.785 liters, while an imperial (UK) gallon is 4.546 liters, about 20% more. US cups, pints and fluid ounces used here are the customary US measures found in most recipes. Pounds, ounces, inches and miles are the same in both systems.
Why is my 1 TB drive only 931 GB?
Drive makers count 1 GB as 1,000,000,000 bytes. Windows counts in binary units, where 1 GiB is 1,073,741,824 bytes, and labels them “GB”. Nothing is missing: 1 TB is 931 GiB.
FAQ
How do I convert Celsius to Fahrenheit in my head?
Double it and add 30 for a rough answer (20 °C ≈ 70 °F). The exact formula is °C × 9 ÷ 5 + 32.
Is anything I enter saved?
No. Conversions happen in your browser and nothing is sent to a server.