Common conversions
| From | To |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 30.48 cm |
| 1 mile | 1.609344 km |
| 1 pound | 0.45359237 kg |
| 1 stone | 14 lb = 6.35 kg |
| 1 US gallon | 3.7854 L |
| 1 UK gallon | 4.54609 L |
| 100 °F | 37.78 °C |
| 1 hp | 745.7 W |
| 1 kWh | 860.42 kcal |
US vs UK gallons and fluid ounces
A US gallon is 3.785 L and an imperial (UK) gallon is 4.546 L — about 20% larger. Fluid ounces differ the other way: a US fl oz is 29.57 mL, a UK fl oz is 28.41 mL. Recipes and fuel economy figures from the US and UK are not directly comparable.
hp vs PS
Mechanical horsepower (hp) is about 745.7 W; metric horsepower (PS, used in European and Asian car specs) is 735.499 W — about 1.4% less.
Why a 1 TB drive shows as 931 GB
Drive makers count 1 TB as 1012 bytes. Windows divides by 1024 instead and still calls the result "GB", so the same drive appears as about 931.32 GiB. This converter shows both: KB/MB/GB (1000) and KiB/MiB/GiB (1024).
Temperature formulas
- °C = (°F − 32) × 5 ÷ 9
- °F = °C × 9 ÷ 5 + 32
- K = °C + 273.15
Related tools
- Area Converter — m², ft², pyeong
- Percentage Calculator — percent change, reverse %