Unit Converter

Convert between metric and imperial units. Length, weight, temperature, area, volume, speed. Free, instant.

Value

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Supported Categories

About Unit Converter

Convert between hundreds of units across 6 categories. Length, weight, temperature, area, volume, and speed. Real-time conversion as you type. All calculations in your browser — no data sent anywhere.

6 Categories

Length (miles to km), weight (lbs to kg), temperature (°F to °C), area, volume, speed. All common conversions.

100+ Units

Metric, imperial, and specialized units. From nanometers to miles, milligrams to tons — everything covered.

Real-Time Results

Convert as you type. No submit button needed. See results update instantly with every keystroke.

Works Offline

Pure JavaScript calculations. No API calls, no internet needed after page load. Reliable anywhere.

📋 Common Use Cases

Cooking & Recipes

Convert grams to cups, ounces, or kilograms when following recipes.

Travel & Distance

Convert miles to kilometers, pounds to kilograms, and Fahrenheit to Celsius abroad.

DIY & Construction

Convert measurements between inches, centimeters, feet, and meters for projects.

Study & Work

Quickly convert units for math, science, engineering, and everyday problem solving.

🪜 How to Use This Tool

Pick a category
Choose length, weight, temperature, area, volume, or speed.

Enter the value
Type the number and select the unit you are converting from.

View the result
The converted value appears instantly in your target unit.

Convert more
Switch categories or values as needed for all your conversions.

Frequently Asked Questions

Are these converters free?▼

Yes. All converters are completely free. No signup needed.

How accurate is the unit converter?▼

It uses standard conversion factors for length, mass, temperature, area, volume, and speed. Results are precise to 6 decimal places.