Unit Converter
A comprehensive unit converter covering length (mm to miles), weight (mg to tonnes), volume (ml to gallons), area (sq ft to hectares), speed (km/h to knots), and temperature (°C / °F / K). All conversions are bidirectional with high-precision results.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?+
°F = °C × 9/5 + 32. So 25°C = 25 × 1.8 + 32 = 77°F. The quick mental estimate: double the Celsius and add 30 (25 → 80°F — close enough for everyday use). For freezing: 0°C = 32°F. For boiling: 100°C = 212°F.
How many km in a mile?+
1 mile = 1.60934 km. A quick approximation: multiply miles by 1.6. To go the other way, divide km by 1.6 (or multiply by 0.621). For marathon distances: 26.2 miles = 42.195 km.
How many kg in a pound?+
1 lb = 0.4536 kg. 1 kg = 2.2046 lb. A useful shortcut: multiply pounds by 0.45 for kilograms, or multiply kilograms by 2.2 for pounds. 100 lb ≈ 45.4 kg; 100 kg ≈ 220.5 lb.