Length, Weight & Temperature Converter

What Is a Unit Converter?

A unit converter turns a measurement in one system into the equivalent value in another, so you can compare lengths, weights, and temperatures across metric and imperial systems used in cooking, travel, construction, fitness, shipping, and science. This free length, weight, and temperature converter handles everyday conversions — from centimeters to inches and kilograms to pounds, to Celsius and Fahrenheit — instantly and accurately.

How Does a Length Converter Work?

A length converter changes a distance measurement, such as meters, feet, miles, or kilometers, into a different unit using a fixed conversion factor. Every unit is first converted to a common base unit (meters), then converted from meters into the target unit — so 1 meter equals 100 centimeters, and 1 mile equals 1.609344 kilometers.

How Does a Weight Converter Work?

A weight (mass) converter works the same way, using kilograms as its base unit. Grams, ounces, pounds, stone, and tonnes are each converted to kilograms first, then to the target unit. It's worth noting that a metric tonne, a US short ton, and an imperial long ton are all different weights — this converter keeps each one distinct and accurate.

How Does a Temperature Converter Work?

Temperature conversion is different from length and weight because it can't use a simple multiplication factor — Celsius, Fahrenheit, Kelvin, and Rankine each have different starting points (zero points), so dedicated formulas are used for each pair, such as F = C × 9/5 + 32.

Why Are Celsius and Fahrenheit Different?

Celsius and Fahrenheit use different reference points: Celsius sets water's freezing point at 0° and boiling point at 100°, while Fahrenheit sets freezing at 32° and boiling at 212°. That's why the same temperature reads as different numbers on each scale, and why a formula — not a simple ratio — is required to convert between them.

How many centimeters are in a meter?
There are 100 centimeters in 1 meter.

How many pounds are in a kilogram?
1 kilogram is approximately 2.20462 pounds.

How many miles are in a kilometer?
1 kilometer is approximately 0.621371 miles.