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Free Universal Unit Converter

The only converter you need. Switch easily between Metric and Imperial units for Length, Weight, Temperature, Speed, Volume, and more.

Last Updated: 15 Jan 2026

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What is a Unit Converter?

A unit converter is a tool that converts measurements between different units within the same category (e.g., length, weight, volume). It helps you switch between metric and imperial systems, convert between different units, and perform accurate measurement conversions without manual calculations or complex formulas.

Unit converters are essential for international communication, cooking, construction, science, engineering, and any situation requiring measurement conversions. They handle conversions between metric (meters, kilograms, liters) and imperial (feet, pounds, gallons) systems, as well as specialized units for temperature, digital storage, speed, and more.

Why Use Our Free Unit Converter?

All-in-One Tool

Convert length, weight, volume, temperature, area, speed, time, and digital storage in one tool. No need for multiple converters—everything in one place.

Metric & Imperial

Convert between metric and imperial systems effortlessly. Switch between meters/feet, kilograms/pounds, liters/gallons, and more instantly.

Instant Results

Get conversion results instantly as you type. No delays, no complex formulas needed—just select units and see conversions immediately.

Common Use Cases for Unit Converter

Daily Life

Cooking & Baking
Convert recipe measurements between metric and imperial. Switch between grams/ounces, milliliters/cups, or Celsius/Fahrenheit for cooking temperatures.
Travel & Distance
Convert distances for travel planning. Switch between kilometers/miles, meters/feet, or understand speed limits in different units (km/h vs mph).
Home Improvement
Convert measurements for DIY projects, construction, or home improvement. Switch between metric and imperial for materials, dimensions, or areas.

Professional & Technical

Science & Engineering
Convert measurements for scientific calculations, engineering projects, or technical work. Switch between metric and imperial units for precision work.
Digital Storage
Convert digital storage units (bytes, KB, MB, GB, TB). Understand file sizes, storage capacity, or data transfer rates in different units.
International Business
Convert measurements for international trade, shipping, or business. Switch between metric (used globally) and imperial (US) systems for compatibility.

Supported Conversion Categories

📏 Length

Convert distances and lengths

Km, m, cm, mm, miles, yards, feet, inches

⚖️ Weight

Convert mass and weight

Kg, g, mg, metric ton, lbs, oz, stone

📦 Volume

Convert liquid and volume measurements

Liters, ml, gallons, quarts, pints, cups

🌡️ Temperature

Convert temperature scales

Celsius, Fahrenheit, Kelvin

⛰️ Area

Convert surface area measurements

Sq meters, sq ft, acres, hectares

💾 Digital Storage

Convert data storage units

Byte, KB, MB, GB, TB, PB

⚡ Speed

Convert velocity and speed

MPH, KM/H, Knots, m/s

⏳ Time

Convert time durations

Seconds, minutes, hours, days, weeks, months, years

Metric vs Imperial Systems

Metric System

Used by most of the world, based on powers of 10. Decimal-based system that's easy to convert between units.

• Length: meters, kilometers, centimeters
• Weight: grams, kilograms, metric tons
• Volume: liters, milliliters
• Temperature: Celsius

Imperial System

Primarily used in the United States. Based on historical units with varying conversion factors.

• Length: feet, inches, yards, miles
• Weight: pounds, ounces, stones
• Volume: gallons, quarts, pints, cups
• Temperature: Fahrenheit

Common Conversion Examples

Length Conversions

1 meter= 3.28 feet

1 kilometer= 0.62 miles

1 inch= 2.54 centimeters

Weight Conversions

1 kilogram= 2.2 pounds

1 pound= 0.45 kilograms

1 ounce= 28.35 grams

Temperature Conversions

0°C= 32°F (freezing)

100°C= 212°F (boiling)

Formula°F = (°C × 9/5) + 32

Volume Conversions

1 meter= 3.28 feet

1 kilometer= 0.62 miles

1 inch= 2.54 centimeters

Weight Conversions

1 kilogram= 2.2 pounds

1 pound= 0.45 kilograms

1 ounce= 28.35 grams

Temperature Conversions

0°C= 32°F (freezing)

100°C= 212°F (boiling)

Formula°F = (°C × 9/5) + 32

Volume Conversions

1 liter= 0.26 gallons

1 gallon= 3.79 liters

1 cup= 236.59 ml

Frequently Asked Questions

What is the difference between Metric and Imperial?

The Metric system (meters, kilograms) is used by most of the world and is based on powers of 10. The Imperial system (feet, pounds) is primarily used in the United States.

How do I convert Celsius to Fahrenheit?

Multiply by 1.8 (or 9/5) and add 32. Or simply use our Temperature tab to do it instantly.

Is 1 GB 1000 MB or 1024 MB?

In binary systems (RAM, OS), 1 GB = 1024 MB. However, hard drive manufacturers often use base-10, where 1 GB = 1000 MB. Our converter uses the binary standard (1024) which is strictly correct for computing.

Can I convert between all unit types?

Yes! Our converter supports length, weight, volume, temperature, area, speed, time, and digital storage. Select the category from the menu and convert between any units within that category instantly.