Unit Conversion
Change measurement units.
What does Unit Conversion mean?
Unit conversion is the process of changing a measurement from one unit to another within the same physical quantity. Whether you are switching between metric and imperial systems for length, weight, or volume, accurate conversion is essential in cooking, science, engineering, trade, and everyday life. This converter handles the most common units across three categories so you can switch systems in an instant.
How to calculate Unit Conversion
Each category uses a base unit for conversion: meters for length, grams for weight, and milliliters for volume. The input value is first converted to the base unit by multiplying by the appropriate factor, then converted to the target unit by dividing. For example, 5 miles → 5 × 1,609.344 = 8,046.72 meters → 8,046.72 / 1,000 = 8.047 km.
FAQ
The metric system (SI) uses base-10 units like meters, grams, and liters. The imperial system uses feet, pounds, and gallons. Metric is used by most of the world; imperial is common in the US for everyday measurements. Metric conversions are simpler because they involve powers of 10.
No. A US gallon is 3,785 ml (128 US fl oz), while a UK (imperial) gallon is 4,546 ml (160 UK fl oz). This converter uses US gallons. The UK gallon is about 20% larger than the US gallon.
This converter uses the US short ton, which equals 2,000 pounds (907.18 kg). The metric tonne is 1,000 kg (2,204.6 lb), and the UK long ton is 2,240 pounds (1,016 kg). Always check which "ton" is being referenced.
One US cup equals approximately 236.6 ml. To convert cups to ml, multiply by 236.6. To go the other way, divide ml by 236.6. For example, 2 cups ≈ 473 ml.
Related calculators
- Temperature Conversion— Celsius ↔ Fahrenheit ↔ Kelvin.
- Speed Conversion— km/h ↔ mph ↔ m/s ↔ knots.
- Area Conversion— m² ↔ ft² ↔ acres ↔ hectares.