Free Unit Converter

Free Online Unit Converter Tool

Our free unit converter lets you instantly convert between hundreds of units across 7 major categories — length, weight, temperature, area, speed, volume, and data storage. Whether you need to convert kilometers to miles, Celsius to Fahrenheit, kilograms to pounds, or INR to USD, this tool gives you accurate results in real-time.

All conversions happen instantly in your browser. No login, no registration, no fees. Just select your category, choose your units, enter a value and the result appears immediately.

How to Use the Free Unit Converter

Converting any unit is simple and takes less than 10 seconds. Here is exactly how to use this tool:

• Step 1 — Choose a category: Click any category tab at the top — Length, Weight, Temperature, Currency, Area, Speed, Volume, or Data Storage.
• Step 2 — Select your units: Choose the unit you are converting from in the left “From” dropdown, and the unit you want to convert to in the right “To” dropdown.
• Step 3 — Enter your value: Type any number in the input box. The converted result appears instantly — no need to press any button.
• Step 4 — Copy your result: Click the “Copy Result” button to copy the full equation to your clipboard for use in documents, messages, or spreadsheets.

Use the ⇄ Swap button in the middle to instantly reverse the conversion direction. The Quick Reference table below the converter automatically shows 6 common values for your selected unit pair, so you can find answers even faster without typing.

Popular Unit Conversions People Search For

These are the most commonly searched unit conversions. All of these work instantly in the tool above:

Length Converter — km, Meter, Feet, Inches, Miles

The length converter is the most used converter worldwide. People need to convert between metric (kilometers, meters, centimeters) and imperial (miles, feet, inches, yards) systems every day — for travel, construction, fitness tracking, and more.

Metric vs Imperial Length Units

The metric system is used by most of the world including India, Europe, and Asia. It is based on meters with prefixes like kilo- (1000×) and centi- (1/100). The imperial system is primarily used in the United States and partially in the UK, using feet, inches, yards, and miles.

India officially uses the metric system, so most everyday measurements are in kilometers, meters, and centimeters. However, many Indians also encounter feet and inches regularly — for height measurements, real estate (property sizes in square feet), and imported goods with imperial measurements on packaging.

Most Common Length Conversions

• Kilometers to Miles (km to miles): Multiply kilometers by 0.621371. For example, 10 km = 6.21 miles. This is useful for converting road distances shown on foreign maps or GPS apps.
• Meters to Feet (m to ft): Multiply meters by 3.28084. For example, a 6-foot person is approximately 1.83 meters tall.
• Centimeters to Inches (cm to inches): Divide centimeters by 2.54. For example, a 30cm ruler is approximately 11.81 inches.
• Miles to Kilometers (miles to km): Multiply miles by 1.60934. For example, a 5-mile run is approximately 8.05 km.
• Feet to Meters (ft to m): Multiply feet by 0.3048. For example, a 10-foot ceiling is approximately 3.05 meters high.

Height Conversion Chart (Feet to Centimeters)

Weight Converter — kg, Pounds, Grams, Ounces

The weight converter is essential for cooking, fitness, shipping, and international trade. India uses kilograms and grams as standard weight units, while the US uses pounds and ounces. The UK uses a mix of both systems, also using stones for body weight.

Kilograms to Pounds (kg to lbs)

1 kilogram = 2.20462 pounds. To convert kg to pounds, multiply the kilogram value by 2.20462. To convert pounds to kg, divide by 2.20462 (or multiply by 0.453592). This conversion is very commonly needed for body weight — if you see a weight given in pounds but you understand kilograms, divide by 2.2 for a quick estimate.

Weight Conversion Quick Reference

Cooking Weight Conversions

Recipes from the US and UK often use ounces and cups while Indian recipes use grams. Understanding weight conversions is essential for following international recipes accurately. Key cooking conversions: 1 cup of flour ≈ 125 grams, 1 cup of sugar ≈ 200 grams, 1 tablespoon of butter ≈ 14 grams, 1 ounce ≈ 28.35 grams.

Temperature Converter — Celsius, Fahrenheit, Kelvin

The temperature converter handles the three major temperature scales used around the world. Celsius (°C) is used in India and most countries globally for everyday temperatures. Fahrenheit (°F) is primarily used in the United States. Kelvin (K) is used in science and physics.

Temperature Conversion Formulas

• Celsius to Fahrenheit: °F = (°C × 9/5) + 32
• Fahrenheit to Celsius: °C = (°F − 32) × 5/9
• Celsius to Kelvin: K = °C + 273.15
• Kelvin to Celsius: °C = K − 273.15
• Fahrenheit to Kelvin: K = (°F − 32) × 5/9 + 273.15

Important Temperature Reference Points

Quick Celsius to Fahrenheit Trick

For a quick mental estimate when converting Celsius to Fahrenheit, double the Celsius value and add 30. For example, 20°C × 2 = 40 + 30 = 70°F (actual value is 68°F — close enough for everyday use). This quick trick is very useful when travelling to countries that use Fahrenheit.

Area Converter — sq ft, sq meter, Acre, Bigha, Hectare

The area converter is especially important in India for real estate transactions. Property sizes are often listed in square feet for residential apartments but in Bigha, Katha, or acres for agricultural and rural land. Converting between these units is essential for understanding land values and areas.

Indian Land Measurement Units

India has several traditional land measurement units that vary by state. The Bigha is commonly used in North India (UP, Bihar, MP, Rajasthan, West Bengal) but its exact size varies — approximately 2508 square meters in UP and Bihar. The Guntha, Cent, and Ground are used in South India. Our converter includes the most common Indian unit, Bigha, for quick reference.

Area Conversion Quick Reference

Data Storage Converter — MB, GB, TB, KB, Bytes

The data storage converter helps you understand file sizes, storage capacities, internet data plan limits, and RAM/SSD specifications. In computing, data storage uses a binary system based on powers of 2, so 1 KB = 1024 bytes (not 1000), 1 MB = 1024 KB, and so on.

Data Storage Units Explained

• Bit (b): The smallest unit of data — either 0 or 1.
• Byte (B): 8 bits. Stores one character of text (one letter, number, or symbol).
• Kilobyte (KB): 1024 bytes. A short text email is about 5–10 KB.
• Megabyte (MB): 1024 KB = 1,048,576 bytes. A high-quality photo is about 3–8 MB. One minute of MP3 music is about 1 MB.
• Gigabyte (GB): 1024 MB. A typical movie (HD) is about 1–4 GB. A mobile data plan is measured in GB.
• Terabyte (TB): 1024 GB. A 1TB hard drive stores approximately 250,000 photos or 500 HD movies.
• Petabyte (PB): 1024 TB. Used for enterprise cloud storage and data centers.

Data Conversion Quick Reference

Why 1 GB = 1024 MB and Not 1000?

Computers work in binary (base 2), so storage units are powers of 2. 2¹⁰ = 1024, which is close to 1000, so the prefix “kilo” was used even though it technically means 1000 in the metric system. This is why hard drive manufacturers (who use 1000-based definitions) advertise a “1 TB” drive that Windows shows as only about 931 GB — both are technically correct but use different definitions. The IEC standard introduced terms like Kibibyte (KiB), Mebibyte (MiB), and Gibibyte (GiB) to distinguish the binary (1024-based) versions, and our tool supports these as well.

Frequently Asked Questions About Unit Conversion

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