Weight Converter

Convert weight and mass instantly

The Weight Converter converts between all the common units of weight and mass — milligrams, grams, kilograms, metric tons, ounces, pounds, and stones. Enter a value, choose your units, and get an accurate result immediately with one-click copy. It handles both the metric and imperial systems, so kilograms-to-pounds and grams-to-ounces are equally effortless.

When you need to convert weight

Weight conversions come up everywhere: cooking with a recipe from another country, tracking body weight in different units, shipping a parcel, dosing by milligrams, or comparing product specifications. Because metric and imperial units are both widely used, having a single tool that converts between them quickly saves time and prevents costly mistakes.

Common weight conversions

From	To	Multiply by
Kilograms	Pounds	2.2046
Pounds	Kilograms	0.4536
Grams	Ounces	0.0353
Ounces	Grams	28.3495
Stones	Kilograms	6.3503

How to use it

1. Type a value into the From field.
2. Pick the unit you are converting from and the unit you want.
3. Read the result instantly, or use the swap button to reverse it.

Weight vs mass

Strictly speaking, mass measures the amount of matter in an object (in grams or kilograms), while weight is the force gravity exerts on that mass. In everyday use the two terms are used interchangeably, and units like pounds and kilograms are applied to both. This converter follows everyday usage so you can convert "weight" the way most people mean it.

Tips for accurate conversions

• For cooking, weigh ingredients rather than using volume for the most consistent results.
• Remember a stone equals 14 pounds — useful when reading UK body-weight figures.
• A metric ton is 1,000 kilograms, not the same as a US "short ton" (about 907 kg).

Private and free

All calculations run in your browser using exact conversion factors. Nothing is uploaded or stored, and you can convert as many values as you like, completely free.