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Weight Converter

Enter one weight and instantly convert it to kilograms, grams, pounds, ounces, stones, tons, and troy and carat units.

Use a comma or period as the decimal separator; do not use thousands separators.

All units

Metric

Use as target unit: Nanogram
Nanogram (ng)
1e12
Use as target unit: Microgram
Microgram (µg)
1,000,000,000
Use as target unit: Milligram
Milligram (mg)
1,000,000
Use as target unit: Gram
Gram (g)
1,000
Use as target unit: Kilogram
Kilogram (kg)
From
1
Use as target unit: Metric tonne
Metric tonne (t)
0.001

US & imperial

Use as target unit: Grain
Grain (gr)
15,432.3583529
Use as target unit: Ounce (avoirdupois)
Ounce (avoirdupois) (oz)
35.2739619496
Use as target unit: Pound (avoirdupois)
Pound (avoirdupois) (lb)
To
2.20462262185
Use as target unit: Stone
Stone (st)
0.157473044418
Use as target unit: Short hundredweight (US, 100 lb)
Short hundredweight (US, 100 lb) (cwt (US))
0.0220462262185
Use as target unit: Long hundredweight (imperial, 112 lb)
Long hundredweight (imperial, 112 lb) (cwt (imp))
0.0196841305522
Use as target unit: Short ton (US)
Short ton (US) (US ton)
0.00110231131092
Use as target unit: Long ton (imperial)
Long ton (imperial) (imp ton)
0.000984206527611

Troy & gemstones

Use as target unit: Metric carat (mass)
Metric carat (mass) (ct)
5,000
Use as target unit: Pennyweight
Pennyweight (dwt)
643.014931373
Use as target unit: Troy ounce
Troy ounce (oz t)
32.1507465686
Use as target unit: Troy pound
Troy pound (lb t)
2.67922888072

Good to know

The weight converter converts directly in your browser between three unit groups: Metric, US & imperial, and Troy & gemstones. It converts mass units; the physical force of weight is measured in newtons and is not part of this tool.

Typical searches include kg to lb, grams to ounces, and convert weight. Calculation runs locally in the browser. Everyday language often uses “weight” for mass, but physically that is a distinction — this tool converts mass units exclusively.

Typical use cases

Everyday life, shipping, and fitness

Convert kg to lb, grams to ounces, or stones to kilograms, for example for shipping weights, recipes, or fitness and nutrition plans.

Correctly weigh precious metals and gemstones

Use the Troy & gemstones group for gold, silver, or diamonds, since troy ounces and carats are different units than everyday ones.

Convert mass for technical and scientific purposes

Convert precisely between metric and US/imperial mass units, for example for data sheets, lab records, or technical documentation.

Tips for better results

Don't confuse mass and weight-force

This tool converts mass (kg, lb, etc.). The physical force of weight is given in newtons and additionally depends on gravitational acceleration — it is not part of this conversion.

Don't confuse a troy ounce with a regular ounce

A troy ounce (about 31.1 g) used for precious metals is heavier than a regular ounce (about 28.35 g) — important for gold and silver prices.

How it works

Step by step

  1. 1

    Enter value and source unit

    Enter the weight value and choose the source unit from one of the three groups.

  2. 2

    Choose the target unit

    Choose the target unit, even from a different group, for example from kilograms to troy ounces.

  3. 3

    Copy the result or swap units

    Copy one result or all results at once, or swap the source and target unit for the next conversion.

Features

Three unit groups including Troy & gemstones

Metric, US & imperial, and troy & gemstones are cleanly separated.

Local conversion

Calculation happens directly in the browser, without transmission to a server.

Clear separation of mass and weight-force

A note makes clear that this converts mass and that weight-force in newtons is not included.

Frequently asked questions

Is weight the same as mass?

Colloquially yes, physically no. This tool converts mass units; the weight-force in newtons additionally depends on gravitational acceleration and is not included.

What is a troy ounce?

A troy ounce equals about 31.1035 grams and is used for precious metals such as gold and silver — it is heavier than the regular ounce at about 28.35 grams.

Are my inputs uploaded?

No. Conversion runs entirely locally in the browser.

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