# Weight Converter

> Free weight converter: convert between milligrams, grams, kilograms, tonnes, ounces, pounds and stone instantly.

Convert between milligrams, grams, kilograms, tonnes, ounces, pounds and stone. Type an amount, pick the units, get the answer instantly.

*Interactive tool: enter your values at https://toollantern.win/weight-converter/ and results update instantly in your browser.*

## How the conversion works

Every unit is defined as an exact number of kilograms: 1 pound is **0.45359237 kg** exactly, 1 ounce is **1/16 of a pound** (28.349523125 g) exactly, 1 stone is **14 pounds** exactly. Your amount is converted to kilograms first, then to the target unit.

## Worked example

Convert **150 pounds** to kilograms: 150 × 0.45359237 = **68.0388555 kg**.

## Mass vs weight

Strictly speaking, kilograms measure mass and pounds measure force, but in everyday language and commerce both are used as units of weight. This converter follows the everyday convention, like bathroom and kitchen scales do.

## Frequently asked questions
### How many kilograms are in a pound?

0.45359237 kg, exactly, by international definition since 1959.

### What is a stone in weight?

14 pounds, or 6.35029318 kg exactly. It is still the everyday unit for body weight in the UK and Ireland.

### How many grams are in an ounce?

28.349523125 grams, exactly one sixteenth of a pound.

### Is a tonne the same as a ton?

Yes. The tonne (1,000 kg) is the metric ton; the US ton (2,000 lb) and UK long ton (2,240 lb) are not included, since tonne is the unambiguous metric unit.

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Interactive version: https://toollantern.win/weight-converter/