Unit Converter - Length, Weight & More

How the Unit Converter Works

1. 01Select the measurement category (length, weight, temperature, volume, etc.)
2. 02Choose the source and target units
3. 03Enter a value - the conversion updates instantly
4. 04Switch direction with the swap button to convert the other way

Unit Conversion Tips

The metric system (meters, kilograms, liters) is used by most of the world, while the US primarily uses imperial units (feet, pounds, gallons). Temperature conversions are the trickiest: to go from Celsius to Fahrenheit, multiply by 9/5 and add 32. For cooking, note that a US cup (237 ml) differs from a metric cup (250 ml). This converter handles all these nuances automatically.

When to Use a Unit Converter

Use this converter whenever you encounter unfamiliar units in recipes (cups to grams), travel (miles to kilometers, Fahrenheit to Celsius), science homework (converting between SI and imperial units), fitness tracking (pounds to kilograms), or international commerce (converting measurements between metric and imperial systems). It is also essential for developers working with data storage units (bytes, kilobytes, megabytes, gigabytes) and speed measurements.

Common Use Cases

• —Convert recipe measurements between metric and imperial (cups to grams, Fahrenheit to Celsius) Weight Converter - kg, lbs, Stone & More
• —Convert distances while traveling internationally (miles to kilometers)
• —Calculate data storage sizes for IT planning (GB to TB, MB to GB)
• —Convert speed units for international comparisons (mph to km/h)
• —Convert between Celsius, Fahrenheit, and Kelvin for science and weather

Expert Tips

• ✻For cooking, use weight (grams) rather than volume (cups) for accuracy - a cup of flour can vary from 100g to 150g depending on packing
• ✻Quick mental conversions: 1 mile ≈ 1.6 km, 1 kg ≈ 2.2 lbs, 1 inch = 2.54 cm exactly
• ✻Temperature conversions have an offset (not just a ratio) - the formulas are °F = °C × 1.8 + 32 and °C = (°F - 32) / 1.8

Frequently Asked Questions

How do I convert Celsius to Fahrenheit?→

Multiply the Celsius temperature by 9/5 (or 1.8), then add 32. For example, 20°C = (20 x 1.8) + 32 = 68°F. To convert back: subtract 32 from Fahrenheit, then multiply by 5/9. The two scales meet at -40° (-40°C = -40°F).

How many kilometers are in a mile?→

One mile equals exactly 1.609344 kilometers. To convert miles to km, multiply by 1.609. To convert km to miles, multiply by 0.6214. A quick mental shortcut: miles x 8 / 5 gives a close approximation to kilometers.

What is the difference between metric and imperial?→

The metric system (SI) is based on powers of 10 (meters, grams, liters) and is used by most countries worldwide. The imperial system uses feet, pounds, and gallons, primarily in the United States, Liberia, and Myanmar. Science and medicine universally use metric units.

How do I convert cups to grams?→

Cup-to-gram conversion depends on the ingredient because cups measure volume while grams measure weight. One cup of water is 236 grams, but one cup of flour is about 125 grams and one cup of sugar is about 200 grams. For precise baking, always use weight (grams) rather than volume (cups).

Is this unit converter free?→

Yes, completely free with no limitations. It supports length, weight, temperature, speed, and data storage conversions. All calculations run in your browser with no data sent to any server.