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Why Use UnitConv?
Instant Conversion
See results as you type. No need to click a button —conversions happen instantly right in your browser.
Precise & Accurate
All conversion factors follow international standards. Get reliable results for everyday use and professional work.
6 Categories
Length, weight, temperature, area, volume, and time —all the most common conversions you need in one place.
Key Features
Everything you need, right at your fingertips. Simple, fast, and built for everyone.
8 Categories
Length, weight, temperature, area, volume, speed, time, and data storage.
100+ Units
Convert between hundreds of different units —all in one place.
Mobile Optimized
Perfect for quick conversions on your phone while shopping or traveling.
Precise Formulas
Accurate conversion formulas you can trust for work and school.
Metric & Imperial
Seamlessly convert between metric, imperial, and US customary units.
How to Use This Unit Converter
Getting started is easy. Just follow these simple steps.
Pick a Category
Choose length, weight, temp, area, volume, speed, time, or data.
Select From & To
Pick the source unit and target unit.
Enter a Value
Type the number you want to convert.
See Result
The converted value appears instantly —copy and use it.
Frequently Asked Questions
How do I convert inches to centimeters?
To convert inches to centimeters, multiply the inch value by 2.54. For example, 10 inches = 10 × 2.54 = 25.4 cm. Or just use UnitConv —select "Inch" as the from unit, "Centimeter" as the to unit, and type your number. The result appears instantly.
How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds. To convert kg to lbs, multiply by 2.20462. To convert lbs to kg, divide by 2.20462. For a quick estimate, you can multiply by 2.2 —the precise value is 2.20462262185.
How to convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit: multiply by 9/5, then add 32. Formula: °F = °C × 9/5 + 32. For example, 20°C = 20 × 9/5 + 32 = 68°F. To go the other way: °C = (°F - 32) × 5/9.
Are these conversions accurate?
Yes. All conversion factors used by UnitConv are based on international standard definitions (metric system, SI units, and internationally agreed-upon imperial conversion factors). Results are calculated using standard JavaScript floating-point arithmetic and displayed with reasonable precision.