Whether you're cooking from a US recipe, buying fabric in Europe, or reading a UK weather forecast, knowing how to convert between metric and imperial units is essential.
Length
| Metric | Imperial | Factor |
|---|---|---|
| 1 cm | 0.394 inches | ÷ 2.54 |
| 1 metre | 3.281 feet | × 3.281 |
| 1 metre | 1.094 yards | × 1.094 |
| 1 km | 0.621 miles | × 0.621 |
Quick conversions:
- 5 km ≈ 3.1 miles
- 100 km ≈ 62 miles
- 1 inch = 2.54 cm exactly
- 1 foot = 30.48 cm
Weight/Mass
| Metric | Imperial | Factor |
|---|---|---|
| 1 gram | 0.035 oz | × 0.035 |
| 100 grams | 3.53 oz | × 0.0353 |
| 1 kg | 2.205 lbs | × 2.205 |
| 1 kg | 0.157 stone | × 0.157 |
Quick conversions:
- 70 kg ≈ 154 lbs ≈ 11 stone
- 1 lb ≈ 454 grams
- 1 oz ≈ 28.35 grams
Volume
| Metric | Imperial (UK) | Imperial (US) |
|---|---|---|
| 1 litre | 1.76 pints | 2.11 pints |
| 1 litre | 0.22 gallons | 0.264 gallons |
| 100 ml | 3.38 fl oz (US) | 3.38 fl oz |
| 1 cup (US) | 237 ml | 237 ml |
Note: UK and US pints, gallons, and fluid ounces are different sizes.
Area
| Metric | Imperial |
|---|---|
| 1 m² | 10.764 ft² |
| 1 km² | 0.386 sq miles |
| 1 hectare | 2.471 acres |
| 1 acre | 4,047 m² |
Temperature Quick Reference
| °C | °F | Context |
|---|---|---|
| 0 | 32 | Freezing |
| 15 | 59 | Cool day |
| 20 | 68 | Comfortable |
| 25 | 77 | Warm |
| 35 | 95 | Hot |
| 100 | 212 | Boiling |
Formula: °F = (°C × 1.8) + 32
Cooking Conversions
| US Measure | Metric |
|---|---|
| 1 teaspoon | 5 ml |
| 1 tablespoon | 15 ml |
| 1 cup | 237 ml |
| 1 pint (US) | 473 ml |
| 1 quart (US) | 946 ml |
| 1 gallon (US) | 3.785 litres |
Speed
| km/h | mph |
|---|---|
| 30 | 18.6 |
| 50 | 31.1 |
| 80 | 49.7 |
| 100 | 62.1 |
| 120 | 74.6 |
Rule of thumb: multiply km/h by 0.6 to get approximate mph.
Use our Unit Converter to convert any unit instantly across length, weight, volume, temperature, speed, and more.