Unit Converter
Convert between units of length, weight, temperature, volume, area, speed, data storage, and more. Supports metric, imperial, and US customary systems with instant results. Ideal for engineering, science, cooking, travel, and everyday measurement conversions — no formulas needed.
Conversion Formula
Options
Measurement Systems
Metric System (SI)
Used by most of the world. Based on powers of 10. Units: metre, kilogram, litre, Celsius. SI prefixes: milli-, centi-, kilo-, mega-.
Imperial / US Customary
Used primarily in the USA and partially in the UK. Units: inch, foot, mile, pound, ounce, gallon, Fahrenheit.
Quick Reference Conversions
Temperature Scales
Three temperature scales are in common use:
- Celsius (°C) — Water freezes at 0°C, boils at 100°C. Used globally for everyday temperatures.
- Fahrenheit (°F) — Water freezes at 32°F, boils at 212°F. Used in the USA.
- Kelvin (K) — Absolute scale; 0 K = absolute zero (−273.15°C). Used in science.
- Formula: °F = (°C × 9/5) + 32 | K = °C + 273.15
Common Unit Converter Use Cases
Travel
Convert miles to km, Fahrenheit to Celsius, and gallons to litres for international trips.
Cooking
Convert cups to ml, ounces to grams, and Fahrenheit to Celsius for recipes.
Engineering
Convert pressure, torque, energy, and force units for technical calculations.
Data / Tech
Convert bytes, KB, MB, GB, TB, and bandwidth units for storage and networking.
Frequently Asked Questions
Related Tools
Unit Conversion for Developers, Engineers, and Everyday Use
Unit conversion sits at the intersection of science, engineering, and daily life. Developers converting between bytes, kilobytes, and gigabytes, engineers switching between metric and imperial measurements, and students converting temperatures or distances all need accurate, instant conversions. Our unit converter covers length, weight, temperature, volume, speed, data storage, and digital units — with precision that handles both everyday and scientific calculations. All conversions use exact conversion factors from international standards, not rounded approximations.
Digital Storage Units: The Developer Essentials
Data storage conversion is uniquely confusing because of the dual meaning of prefixes. In the SI (decimal) system, 1 KB = 1,000 bytes. In the binary (IEC) system, 1 KiB = 1,024 bytes. Hard drive manufacturers use decimal, operating systems often use binary, and the discrepancy confuses users who wonder why their 1 TB drive shows 931 GB. Our converter supports both systems and clearly labels which is being used, eliminating ambiguity in capacity planning, bandwidth calculation, and infrastructure sizing.
International Standards and Measurement
The metric system (SI) is used by virtually every country except the United States, which primarily uses US customary units. Software serving international users must handle both systems gracefully. Temperature conversion (Celsius/Fahrenheit/Kelvin), distance (kilometres/miles), and weight (kilograms/pounds) are the most common conversions in globalised applications. For time-related conversions, use the Time Converter. Calculate ages and date differences with the Age Calculator. Format data structures with the JSON Viewer. Explore all tools on the homepage.