📏 Unit Converter

Convert between 60+ units — length, weight, temperature, area, volume, speed, time and digital storage. Everything runs locally in your browser.

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What is a unit converter?

A unit converter is a tool that converts values between different units of measurement. For example, you can convert meters to feet, kilograms to pounds, or Celsius to Fahrenheit. Our converter supports 8 categories and over 60 units, including both metric (SI) and imperial systems.

Metric vs. Imperial system

The metric system (SI) is used in most countries and is based on decimal units — meter, kilogram, liter. The imperial system (also known as "US customary") is used in the United States, Liberia and Myanmar — foot, pound, gallon. Our converter makes switching between these systems easy.

Why accuracy matters

Accurate conversions are critical in science, engineering, medicine, cooking and trade. A small error in conversion can lead to serious consequences — from a failed recipe to machine failure. Our converter uses precise international standards (NIST, BIPM) to ensure maximum accuracy.

Frequently asked questions

How do I convert cm to inches?

To convert centimeters to inches, divide the number of centimeters by 2.54 (since 1 inch = 2.54 cm). Example: 10 cm ÷ 2.54 = 3.937 inches.

What is 1 kg in pounds?

1 kilogram equals approximately 2.20462 pounds. To convert kg to lbs, multiply by 2.20462. Example: 5 kg × 2.20462 = 11.023 lbs.

How do I convert Celsius to Fahrenheit?

Formula: °F = (°C × 9/5) + 32. Example: 25°C × 1.8 + 32 = 77°F. To convert back: °C = (°F − 32) × 5/9.

How many meters are in a mile?

1 mile equals exactly 1,609.344 meters (about 1.609 km). To convert miles to meters, multiply by 1609.344.

How many grams are in an ounce?

1 ounce (oz) equals approximately 28.3495 grams. To convert ounces to grams, multiply by 28.3495.

How many liters in a US gallon?

1 US gallon equals approximately 3.78541 liters. Note: 1 imperial gallon (UK) equals 4.54609 liters, so make sure you use the correct unit.

How do I convert km/h to mph?

To convert kilometers per hour to miles per hour, divide by 1.60934. Example: 100 km/h ÷ 1.60934 = 62.137 mph.

How many bytes in a kilobyte?

According to SI standard, 1 kilobyte = 1,000 bytes. However, in computing (binary), 1 kibibyte (KiB) = 1,024 bytes. Our converter uses the binary standard (1 KB = 1024 B) which is common for RAM and file sizes.

Is this unit converter free?

Yes, 100% free. No registration, no limits, no ads from our side. All conversions happen instantly in your browser.

Does my data leave my browser?

No. All conversions are calculated locally in your browser using JavaScript. We never send your values to any server. Your privacy is fully protected.