Unit Converter

Convert between different units of measurement instantly. Length, weight, temperature, area, volume, time, speed, and data conversions all in one tool.

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Popular Conversions

Quick access to commonly used unit conversions

How to Use Unit Converter

1

Select Category

Choose the type of conversion (length, weight, temperature, etc.) from the tabs above.

2

Enter Value

Input the numerical value you want to convert in the "Convert From" field.

3

Choose Units

Select the input unit and the output unit you want to convert to.

4

View Results

See instant conversion results. Click on any result to copy it to clipboard.

Measurement Systems

Metric System

Used worldwide (except USA). Based on meters, grams, liters. Decimal based (powers of 10).

Imperial System

Used in USA. Based on inches, pounds, gallons. Historical system with irregular conversions.

US Customary

Used in USA for trade. Similar to imperial but with some different definitions.

Conversion Tips

Temperature: Celsius and Fahrenheit scales intersect at -40° (-40°C = -40°F).
Length: 1 inch = 2.54 cm exactly. Useful for quick mental conversions.
Weight: 1 kg ≈ 2.20462 lbs. For rough estimate: 1 kg ≈ 2.2 lbs.
Volume: 1 liter ≈ 0.264 gallons. 4 liters ≈ 1 gallon for quick estimation.
Data: 1 GB = 1024 MB, but manufacturers use 1000 MB = 1 GB.

Frequently Asked Questions

How accurate are the conversions?
Our conversions are highly accurate, using standard conversion factors recognized internationally. For scientific purposes, we use exact values where defined (e.g., 1 inch = 2.54 cm exactly). All conversions are double-checked for accuracy.
Which countries use the metric system?
Almost all countries use the metric system as their official system of measurement. The only exceptions are the United States, Liberia, and Myanmar. However, even these countries use metric in scientific and medical contexts.
How do I convert temperature between Celsius and Fahrenheit?
Use these formulas: • Celsius to Fahrenheit: (°C × 9/5) + 32 = °F • Fahrenheit to Celsius: (°F - 32) × 5/9 = °C • For quick estimate: Double Celsius, add 30 to get approximate Fahrenheit.
What's the difference between US and imperial gallons?
• US gallon = 3.785 liters • Imperial gallon (UK) = 4.546 liters • This means an imperial gallon is about 20% larger than a US gallon. Our converter handles both systems correctly.