Unit Conversion Guide: Metric, Imperial & More

Length Conversions

• 1 inch = 2.54 cm
• 1 foot = 30.48 cm
• 1 yard = 0.914 metres
• 1 mile = 1.609 km
• 1 km = 0.621 miles

Quick trick: To convert miles to km, multiply by 1.6. For km to miles, multiply by 0.6.

Weight Conversions

• 1 ounce = 28.35 grams
• 1 pound = 0.454 kg
• 1 stone = 6.35 kg
• 1 kg = 2.205 pounds

Quick trick: Double the kg and add 10% for a rough pounds estimate. 70kg = 140 + 14 = 154 lbs (actual: 154.3).

Temperature

• Celsius to Fahrenheit: (°C x 9/5) + 32
• Fahrenheit to Celsius: (°F - 32) x 5/9

Key reference points: 0°C = 32°F (freezing), 20°C = 68°F (room temp), 37°C = 98.6°F (body temp), 100°C = 212°F (boiling).

Volume

• 1 litre = 1.76 pints
• 1 gallon = 4.546 litres (UK) / 3.785 litres (US)
• 1 cup = 237ml (US) / 284ml (UK)
• 1 tablespoon = 15ml

Area

• 1 acre = 4,047 sq metres
• 1 sq metre = 10.76 sq feet
• 1 hectare = 2.471 acres

Cooking Conversions

• 1 cup flour = 125g
• 1 cup sugar = 200g
• 1 cup butter = 227g
• 1 stick butter = 113g

Use our unit converter for instant, accurate conversions between any units.