Unit conversion chart: cm, inches, kg, lbs, °C, °F and more
Updated 23 October 2026
Tool for this guide: Unit converter
Short answer: 1 inch = 2.54 cm, 1 kg = 2.205 lb, and °F = °C × 9 ÷ 5 + 32. For any other value or unit, use the unit converter, which shows the result in every unit at once.
Length
| From | To |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 30.48 cm |
| 1 yard | 0.9144 m |
| 1 mile | 1.609 km |
| 1 cm | 0.3937 inches |
| 1 m | 3.281 feet |
Height example: 5 ft 8 in = 68 inches × 2.54 = 172.7 cm.
Weight
| From | To |
|---|---|
| 1 kg | 2.205 lb |
| 1 lb | 453.6 g |
| 1 oz | 28.35 g |
| 1 stone | 6.35 kg (14 lb) |
Temperature
| °C | °F |
|---|---|
| −10 | 14 |
| 0 | 32 |
| 20 | 68 |
| 37 | 98.6 |
| 100 | 212 |
To convert: °F = °C × 9 ÷ 5 + 32 and °C = (°F − 32) × 5 ÷ 9.
Volume and cooking
| From | To |
|---|---|
| 1 US cup | 236.6 ml |
| 1 tablespoon (US) | 14.8 ml |
| 1 teaspoon (US) | 4.93 ml |
| 1 US gallon | 3.785 litres |
| 1 UK gallon | 4.546 litres |
Data sizes
Drive makers use decimal units (1 GB = 1,000,000,000 bytes); some computers use binary units (1 GiB = 1,073,741,824 bytes). That's why a 1 TB drive shows as about 931 GB.
Questions
Is a US gallon the same as a UK gallon?
No. A UK (imperial) gallon is about 20% bigger: 4.546 litres against 3.785.
How do I convert km/h to mph?
Multiply by 0.6214. 100 km/h is about 62 mph. The converter's Speed tab does it for any value.
Try it now
Convert length, weight, temperature, area, volume, speed, data and time: cm to inches, kg to pounds, °C to °F and dozens more, with every unit shown at once.
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