⚖️ Unit Converter
Convert between length, weight, temperature, volume, speed, area and digital storage units instantly. Swap button reverses any conversion — free, no login.
Why Unit Conversion Still Matters in 2026
Despite global scientific standardization on the metric system (SI units) since the 1960 General Conference on Weights and Measures, unit conversion remains a daily practical need. The United States — home to the world's largest consumer market — officially uses the imperial system for everyday measurements. The UK uses a hybrid: metric for most commercial purposes, but imperial for road distances and some food quantities. International travel, global e-commerce, scientific collaboration, and engineering projects routinely require converting between metric and imperial units.
Beyond the metric/imperial divide, unit conversion within a single system is equally common: converting digital storage from gigabytes to terabytes, converting speeds from km/h for European road signs to mph for UK roads, or converting Celsius weather forecasts to Fahrenheit. This tool covers all seven most-needed conversion categories in a single interface.
Most Common Unit Conversions — Quick Reference
| Category | Most Searched Conversion | Answer |
|---|---|---|
| Length | 1 mile → km | 1.60934 km |
| Weight | 1 kg → lbs | 2.20462 lbs |
| Temperature | 100°C → °F | 212°F |
| Volume | 1 gallon (US) → liters | 3.78541 L |
| Speed | 100 km/h → mph | 62.137 mph |
| Digital | 1 GB → MB | 1,024 MB |
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Formula: °F = (°C × 9/5) + 32. Key benchmarks: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C = 98.6°F (body temp), 20°C = 68°F (room temp). Reverse: °C = (°F − 32) × 5/9.
How many kilometers are in a mile?
1 mile = 1.60934 km exactly. Quick approximation: 5 miles ≈ 8 km, 10 miles ≈ 16 km, 100 km ≈ 62 miles. The mile is the primary road distance unit in the US, UK, and Myanmar.
Why are there two measurement systems?
The metric system (base-10) was developed in France in 1795 and adopted globally for science and commerce. The imperial system evolved from medieval British units retained by the US after independence. Only three countries use imperial as the primary standard: the United States, Myanmar, and Liberia.