Convert weight, volume, length, area, and temperature instantly.
Whether you're following a recipe from another country, checking a product's weight before shipping, converting a room's dimensions for furniture shopping, or making sense of a temperature reading from an unfamiliar system, unit conversion comes up constantly in everyday life. Rather than remembering dozens of individual formulas or searching for a separate converter for each unit type, this tool covers the five most commonly needed categories — weight, volume, length, area, and temperature — in one place, so you can switch between them instantly without leaving the page.
Most of the world uses the metric system (kilograms, liters, meters, Celsius), built on clean base-10 relationships that make conversions between units within the system simple. The United States, however, still primarily uses the imperial/US customary system (pounds, gallons, feet, Fahrenheit) for everyday measurements, which is why converting between the two — kg to lb, liters to gallons, meters to feet — is one of the most searched conversion needs online. This tool handles both directions equally, so it doesn't matter which system you're starting from or converting to.
Weight, volume, length, and area conversions are all simple multiplication — multiply by a fixed factor and you're done. Temperature is the exception: Celsius to Fahrenheit requires the formula (C × 9/5) + 32, and Celsius to Kelvin is simply C + 273.15, because these scales don't share a common zero point the way metric weight or length units do. This tool applies the correct formula automatically based on which temperature units you select, so you don't need to remember or manually calculate any of these formulas yourself.
A common mistake is confusing similarly named units across systems — a US gallon and a UK (imperial) gallon differ by about 20%, and a US fluid ounce differs slightly from a UK fluid ounce, so always double check which regional standard applies to your situation, especially for cooking or shipping across countries. Another common error is rounding too early in multi-step conversions, which compounds small errors — this tool carries full decimal precision through the calculation and only rounds the final displayed result, giving you a more accurate number than doing the math in stages by hand.
Select Weight, choose kg as the 'from' unit and lb as the 'to' unit, then enter your value — 1 kg equals approximately 2.20462 lb.
Yes, it uses standard internationally defined conversion factors for every unit, giving results accurate to several decimal places.
Yes — select the Temperature category, since temperature conversion uses a formula rather than a simple multiplier like other unit types.
Weight, Volume, Length, Area, and Temperature, each with the most commonly used metric and imperial units.
Yes, completely free, and it runs entirely in your browser — no data is uploaded or stored anywhere.