Quick Answer
How does a unit converter work?
// Answer
Each unit is defined relative to a base unit for its category (for length, the meter). To convert, the input is changed to the base unit and then to the target unit. Temperature is a special case using formulas, since Celsius, Fahrenheit, and Kelvin do not share a simple ratio.
Common conversions
| From | To | Result |
|---|---|---|
| 1 mile | kilometers | 1.609 km |
| 1 kg | pounds | 2.205 lb |
| 100°F | Celsius | 37.8°C |
| 1 gallon | liters | 3.785 L |
Why use this tool
Everyday and technical conversions
Cooking, travel, fitness, science homework, or engineering — convert between metric and imperial in any direction. Pick a category and the relevant units load automatically.
FAQ
Frequently asked questions
Length, weight/mass, temperature, volume, and speed, each with common metric and imperial units.
Using exact formulas between Celsius, Fahrenheit, and Kelvin, not a simple ratio.
Yes, swap the from and to units freely.
Yes, conversion runs entirely in your browser.
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