Unit conversion chart
Common conversions with exact factors and formulas — length, weight, temperature, speed, and volume. Each row links a live converter you can run in your browser.
Quick answer
Key conversions: 1 inch = 2.54 cm, 1 kg = 2.20462 lb, °F = °C × 9/5 + 32, 1 km = 0.621371 miles, 1 US gallon = 3.78541 L. Use the linked converters to run any value instantly — not uploaded to our servers for processing.
Length
| Unit | Equals | Convert |
|---|---|---|
| 1 inch | 2.54 cm | Converter → |
| 1 cm | 0.393701 inch | Converter → |
| 1 foot | 30.48 cm | Converter → |
| 1 cm | 0.0328084 ft | Converter → |
| 1 cm | 10 mm | Converter → |
| 1 mm | 0.1 cm | Converter → |
| 1 meter | 3.28084 ft | — |
| 1 km | 0.621371 miles | Converter → |
| 1 mile | 1.609344 km | Converter → |
| 1 yard | 0.9144 m | — |
Weight / Mass
| Unit | Equals | Convert |
|---|---|---|
| 1 kg | 2.204623 lb | Converter → |
| 1 lb | 0.453592 kg | Converter → |
| 1 ounce | 28.3495 g | — |
| 1 gram | 0.035274 oz | — |
| 1 stone | 6.35029 kg | Converter → |
| 1 kg | 0.157473 stone | Converter → |
Temperature
| Unit | Equals | Convert |
|---|---|---|
| °C → °F | °F = °C × 9/5 + 32 | Converter → |
| °F → °C | °C = (°F − 32) × 5/9 | Converter → |
| °C → Kelvin | K = °C + 273.15 | — |
Speed
| Unit | Equals | Convert |
|---|---|---|
| 1 km/h | 0.621371 mph | — |
| 1 mph | 1.609344 km/h | — |
| 1 m/s | 3.6 km/h | — |
Volume
| Unit | Equals | Convert |
|---|---|---|
| 1 liter | 0.264172 US gallons | — |
| 1 US gallon | 3.785412 L | — |
| 1 cup (US) | 236.588 mL | — |
| 1 fl oz (US) | 29.5735 mL | — |
Live converters: °C to °F · kg to lbs · cm to inches · km to miles
Frequently asked questions
How do I convert cm to inches?
Divide the centimeters by 2.54. For example, 30 cm ÷ 2.54 = 11.81 inches.
How many pounds are in a kilogram?
1 kilogram is about 2.20462 pounds. Multiply kilograms by 2.20462 to get pounds.
What is the formula to convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. To go back: °C = (°F − 32) × 5/9.
How do I convert km to miles?
Divide the kilometers by 1.609344 (or multiply by 0.621371). For example, 5 km ≈ 3.11 miles.