Unit Converter

Complete Guide to Unit Conversion

Our unit converter supports 8 categories with dozens of units, all based on internationally recognized SI standards. Results update in real-time as you type.

Supported Categories

• Length — meters, feet, inches, miles, km, cm, mm, yards, nautical miles
• Weight — kilograms, pounds, ounces, grams, tons, stones
• Temperature — Celsius, Fahrenheit, Kelvin
• Area — sq meters, sq feet, acres, hectares, sq miles
• Volume — liters, gallons, cups, pints, quarts, fluid ounces, ml
• Speed — km/h, mph, m/s, knots, Mach
• Time — seconds, minutes, hours, days, weeks, months, years
• Data — bytes, KB, MB, GB, TB, bits

How to Use

• Select a category from the tabs above
• Choose From and To units from the dropdowns
• Enter a value — result appears instantly
• Use the ⇄ swap button to reverse the conversion
• Click any Quick Conversion to load it instantly

Temperature Note

Temperature conversions use formulas rather than simple multiplication. °C to °F = (°C × 9/5) + 32. °C to Kelvin = °C + 273.15. The converter handles these automatically.

Unit Conversion Reference Guide

Understanding unit conversions is essential for science, cooking, travel, engineering, and everyday tasks. Here is a practical reference guide for the most common conversions you will encounter.

Length Conversions — Quick Reference

Length is one of the most commonly converted measurements, especially when dealing with international distances or construction projects:

• 1 meter = 3.28084 feet = 39.3701 inches = 100 centimeters
• 1 kilometer = 0.621371 miles = 1,000 meters
• 1 mile = 1.60934 kilometers = 5,280 feet
• 1 foot = 30.48 centimeters = 12 inches
• 1 inch = 2.54 centimeters

Weight Conversions — Quick Reference

Weight conversions are critical for cooking recipes, shipping packages, and understanding nutritional information:

• 1 kilogram = 2.20462 pounds = 1,000 grams = 35.274 ounces
• 1 pound = 0.453592 kilograms = 453.592 grams = 16 ounces
• 1 ounce = 28.3495 grams
• 1 stone = 6.35029 kilograms = 14 pounds

Temperature Conversions — Formulas

Unlike other unit conversions, temperature requires formulas rather than simple multiplication:

• Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
• Fahrenheit to Celsius: (°F − 32) × 5/9 = °C
• Celsius to Kelvin: °C + 273.15 = K
• Key reference points: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C = 98.6°F (body temperature)

Why Unit Conversions Matter

In a globalized world, the ability to convert between measurement systems is increasingly important. The United States primarily uses the Imperial system (feet, pounds, Fahrenheit), while most of the world uses the Metric system (meters, kilograms, Celsius). Scientists worldwide use the SI (International System of Units) regardless of their country's everyday system.

Errors in unit conversion can have serious consequences. In 1999, NASA lost the Mars Climate Orbiter spacecraft worth $327 million because one engineering team used metric units while another used imperial units. Accurate unit conversion is genuinely critical in engineering, medicine, aviation, and science.

Metric vs Imperial System

The metric system uses base-10 relationships, making conversions straightforward — 1,000 meters in a kilometer, 100 centimeters in a meter, and so on. The imperial system has irregular relationships (12 inches in a foot, 3 feet in a yard, 1,760 yards in a mile) making mental conversion more complex and error-prone. Our converter handles both systems instantly and accurately.

Data Storage Conversions

In the digital age, understanding data units has become just as important as traditional measurements:

• 1 Kilobyte (KB) = 1,024 Bytes
• 1 Megabyte (MB) = 1,024 KB = 1,048,576 Bytes
• 1 Gigabyte (GB) = 1,024 MB
• 1 Terabyte (TB) = 1,024 GB

A typical HD movie is about 4–8 GB. A high-quality music album is approximately 100–200 MB. Understanding these sizes helps when managing storage, comparing cloud plans, or estimating download times.