Unit Converter
Convert length, weight, temperature, area, volume, speed and time units quickly and accurately with our free online Unit Converter.
Perfect for everyday calculations, school, work, travel, engineering, science and quick measurement conversions.
Convert Units Instantly
Fast and accurate unit conversions
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Conversion Formula
Calculation Steps
Everything You Need for Unit Conversion
Quickly convert between commonly used units without complicated formulas or unnecessary steps.
Multiple Categories
Convert length, weight, temperature, area, volume, speed and time.
Instant Results
Get your conversion result quickly without refreshing the page.
Accurate
Reliable calculations designed for everyday conversion needs.
Completely Free
Use the converter as often as you need with no registration required.
What Is a Unit Converter?
A unit converter changes a measurement from one unit into another equivalent unit. For example, you can convert kilometers to miles, kilograms to pounds, liters to gallons, or Celsius to Fahrenheit.
Our online Unit Converter brings several common conversion categories together in one simple tool. Enter a value, select the original unit, choose the unit you want, and calculate the conversion instantly.
The calculator is useful for students, professionals, travelers, engineers, shoppers and anyone who needs a quick measurement conversion.
How to Use the Unit Converter
Converting units takes only a few simple steps.
Select a Category
Choose length, weight, temperature, area, volume, speed or time.
Enter Your Value
Enter the number you want to convert.
Choose From and To Units
Select the original unit and the unit you want to convert into.
Calculate
Click Calculate to instantly see your converted value and formula.
Convert Common Measurement Units
Choose from several practical categories for everyday and professional use.
Length
Meters, kilometers, miles, feet, inches and more.
Weight / Mass
Kilograms, grams, pounds, ounces and other units.
Temperature
Convert Celsius, Fahrenheit and Kelvin.
Area
Square meters, acres, hectares and more.
Volume
Liters, milliliters, gallons, cups and more.
Speed
Kilometers per hour, miles per hour and more.
Time
Seconds, minutes, hours, days and more.
Popular Unit Conversions
| Category | Common Conversion | Example |
|---|---|---|
| Length | Kilometers → Miles | 1 km ≈ 0.621371 mi |
| Weight | Kilograms → Pounds | 1 kg ≈ 2.20462 lb |
| Temperature | Celsius → Fahrenheit | °F = (°C × 9/5) + 32 |
| Volume | Liters → Gallons | 1 L ≈ 0.264172 gal |
| Speed | km/h → mph | 1 km/h ≈ 0.621371 mph |
Frequently Asked Questions
Common questions about converting measurement units.
What can I convert with this Unit Converter?
Is the Unit Converter free?
Can I use it on a mobile phone?
How accurate are the conversions?
Can I swap the From and To units?
Important Information
Unit conversion results depend on the standard conversion relationship between the selected units.
Some measurements can have different conventions depending on the region or application. For example, volume units such as gallons may refer to different standards.
For scientific, engineering, financial or other high-stakes applications, verify the required unit standard and precision before using a converted value.
Convert Units Quickly and Easily
Use our free Unit Converter whenever you need a fast and convenient conversion between common measurement units.
Start Converting