Accuracy
Factors are exact by definition where possible: 1 inch = 25.4 mm, 1 pound = 0.45359237 kg, 1 US gallon = 3.785411784 liters. Volume units are US customary; imperial (UK) gallons and pints are different sizes.
Quick references
- 1 mile = 1.609344 km
- 1 kg ≈ 2.2046 lb
- °F = °C × 9/5 + 32
- 0 °C = 273.15 K