Unit converter
Convert length, weight, temperature, volume, area and speed between metric and U.S. customary units, with exact factors and a quick reference table.
Fix the highlighted fields to see your result.
How it is calculated
Each unit is first converted to a base unit (meter, kilogram, liter, square meter or meter per second) using internationally defined exact factors, then to the target unit. Temperature uses formulas: °F = °C × 9/5 + 32 and K = °C + 273.15.
Assumptions and limitations
- Cups, fluid ounces, pints, quarts and gallons are U.S. measures.
- For cooking, converting cups to grams depends on the ingredient’s density, not only its volume.
This tool is educational and provides estimates. It is not a credit offer or financial advice. Actual terms are set by each institution.
Frequently asked questions
How many kilograms are in a pound?
One pound is exactly 0.45359237 kilograms, so 1 kg ≈ 2.2046 lb.
How do I convert Fahrenheit to Celsius?
Subtract 32 and multiply by 5/9. For example, 98.6 °F = (98.6 − 32) × 5/9 = 37 °C.
How many kilometers are in a mile?
One mile is exactly 1.609344 kilometers.
Is a U.S. gallon the same as an imperial gallon?
No. This converter uses the U.S. liquid gallon (3.785411784 liters). The imperial gallon used in the United Kingdom is about 4.546 liters.