Unit Converter
Convert between units of length, weight, temperature, volume, area, and speed.
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How to Use This Unit Converter
- Select a category — choose length, weight, temperature, volume, area, speed, data, or time.
- Enter a value — type the number you want to convert.
- Choose your units — select the "from" and "to" units. Click the swap button to reverse them.
Common Unit Conversions
Length Conversions
The most common length conversions involve switching between metric (meters, centimeters, kilometers) and imperial (feet, inches, miles) systems. Key relationships: 1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609 km, 1 meter = 3.281 feet.
Weight Conversions
Weight conversions between metric and imperial are common in cooking, fitness, and shipping. Key relationships: 1 kg = 2.205 lbs, 1 lb = 453.6 g, 1 oz = 28.35 g, 1 stone = 14 lbs = 6.35 kg.
Temperature Conversions
Temperature conversion formulas are unique because they involve offsets, not just multiplication: Celsius to Fahrenheit: F = C × 9/5 + 32. Fahrenheit to Celsius: C = (F - 32) × 5/9. Celsius to Kelvin: K = C + 273.15. Quick reference: 0°C = 32°F, 100°C = 212°F, 37°C = 98.6°F.
Volume Conversions
Volume conversions are especially important in cooking and science. Key relationships: 1 gallon = 3.785 liters, 1 liter = 33.814 oz, 1 cup = 236.6 ml, 1 tablespoon = 14.79 ml.
Digital Storage Conversions
Digital storage uses base-2 multipliers: 1 KB = 1,024 bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB, 1 TB = 1,024 GB. Note that storage manufacturers sometimes use base-10 (1 KB = 1,000 bytes), which is why a "1 TB" drive shows less than 1 TB in your operating system.