Convert between units of length, weight, temperature, speed, area and volume.
A unit converter is a tool that converts measurements from one unit to another within the same physical quantity. Our free online unit converter handles length, weight, temperature, volume, speed, area, pressure, energy, data storage, and many other measurement categories — making it the only conversion tool you need.
The metric system (SI units) is used by most countries worldwide and in all scientific work. The imperial system is primarily used in the United States, Myanmar, and Liberia for everyday measurements. India officially uses the metric system. Understanding both systems is important for international communication, travel, cooking recipes from foreign sources, and understanding American product specifications.
Celsius is used in most countries for weather and everyday temperature. Fahrenheit is used in the USA. Kelvin is the scientific standard where 0K is absolute zero (the coldest possible temperature, −273.15°C). Water freezes at 0°C = 32°F = 273.15K and boils at 100°C = 212°F = 373.15K. Human body temperature is 37°C = 98.6°F.
In the digital world, understanding data units is essential. 1 Kilobyte (KB) = 1,024 Bytes. 1 Megabyte (MB) = 1,024 KB. 1 Gigabyte (GB) = 1,024 MB. 1 Terabyte (TB) = 1,024 GB. Internet speed is measured in Megabits per second (Mbps) — note that 1 Byte = 8 bits, so a 100 Mbps connection downloads at about 12.5 MB per second.
Unit conversion errors have caused real, well-documented consequences beyond simple inconvenience — a famous example is NASA's Mars Climate Orbiter, lost in 1999 partly due to a mismatch between metric and imperial units used by different engineering teams working on the same mission. While most everyday unit conversion mistakes don't carry such dramatic stakes, the underlying lesson applies broadly: mixing unit systems without careful, explicit conversion is a genuine and surprisingly common source of costly errors across engineering, science, cooking, and international commerce.
The world operates on two primary measurement systems — metric (used by most countries) and imperial/US customary (used primarily in the US and a small number of other countries) — and navigating between them is a routine necessity for international business, travel, scientific collaboration, and even following recipes or instructions written for a different regional audience.
Length conversions matter for construction, travel distances, and everyday measurements. Weight and mass conversions matter for cooking, shipping, and medical dosing. Temperature conversions matter for weather, cooking, and scientific work, and are notably different from other conversions since they involve an offset in addition to a scaling factor (unlike most unit conversions, which are pure multiplication). Volume conversions matter for cooking, fuel, and liquid measurements broadly across countless everyday and professional contexts.
Converting a measurement to a different unit shouldn't imply more precision than the original measurement actually had — a length measured to the nearest inch doesn't become more precise just because it's converted to centimeters with several decimal places. Keeping converted results at an appropriate level of precision relative to the original measurement avoids implying false accuracy that the source data never actually supported.
Our unit converter handles length, weight, temperature, volume, speed, area, pressure, energy, and many other common measurement types.
Fahrenheit = (Celsius × 9/5) + 32. For example, 100°C = (100 × 9/5) + 32 = 212°F.
1 kilogram = 2.20462 pounds. Multiply your kg value by 2.20462 to get pounds. For example, 70 kg = 70 × 2.20462 = 154.3 pounds.
1 kilometer = 0.621371 miles. Multiply km by 0.621371. For example, 10 km = 6.21 miles.
Yes, this unit converter supports mass conversions including kilograms, grams, ounces, and pounds - just select your units and enter a value above.
