Unit Converter
Convert between units of measurement across cooking, length, weight, temperature, and volume.
How It Works
Most unit conversions work by multiplying a value by a fixed conversion factor. For example, 1 inch equals exactly 2.54 centimeters, so converting 5 inches to centimeters is simply 5 × 2.54 = 12.7 cm. When converting between two non-base units (e.g., miles to feet), the calculation is: value × (miles-to-meters / feet-to-meters).
Temperature is a special case — it uses offset formulas rather than ratios. °C to °F: multiply by 9/5 then add 32. °C to Kelvin: add 273.15. The Kelvin scale starts at absolute zero (−273.15°C), the coldest possible temperature.
Cooking measurements differ by country. The US tablespoon is 14.787 ml; the UK tablespoon is 15 ml; the Australian tablespoon is 20 ml. This converter uses US customary units. Similarly, the US fluid ounce (29.574 ml) differs slightly from the imperial fluid ounce (28.413 ml).
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Frequently Asked Questions
How many centimeters are in an inch?
Exactly 2.54 centimeters. So 5 inches = 12.7 cm, 12 inches (1 foot) = 30.48 cm, and 1 meter = 39.37 inches.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. Example: 98.6°F → (98.6 − 32) × 5/9 = 37°C. To go the other direction: multiply by 9/5, then add 32.
How many cups are in a liter?
About 4.227 US cups per liter. One US cup = 236.6 ml. Common cooking conversions: 1 cup = 16 tablespoons = 48 teaspoons = 8 fluid ounces.
How do I convert pounds to kilograms?
Divide pounds by 2.2046. Example: 150 lbs ÷ 2.2046 ≈ 68.0 kg. To convert kg to lbs, multiply by 2.2046.
How many miles are in a kilometer?
1 kilometer = 0.6214 miles. 1 mile = 1.6093 km. Useful shortcut: multiply km by 0.6 for a rough mile estimate (5 km ≈ 3 miles).