Weight Converter
Convert kilograms, pounds, ounces, stones, grams, tons and more.
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Milligram (mg)
Gram (g)
| Unit | 1 mg equals |
|---|---|
| Milligram (mg) | 1 |
| Gram (g) | 0.001 |
| Kilogram (kg) | 0.000001 |
| Metric Ton (t) | 1e-9 |
| Ounce (oz) | 0.000035274 |
| Pound (lb) | 0.00000220462 |
| Stone (st) | 1.57473e-7 |
| US Ton (ton) | 1.10231e-9 |
How it works
- 1 kilogram = 2.20462 pounds
- 1 stone = 14 pounds
- 1 ounce = 28.3495 grams
Popular weight conversions
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Frequently asked
How many pounds in a kilogram?
1 kg ≈ 2.20462 lb.
What is a stone?
A stone is a British unit of mass equal to 14 pounds (≈ 6.35 kg).
Where you'll actually use this
Weight (technically mass) measures how much matter an object contains. The kilogram anchors the metric system, while pounds and ounces dominate everyday use in the United States.
- Shipping & freight
Postage, courier rates, and pallet weights swap between kg and lb depending on carrier and destination country.
- Cooking & baking
Precise recipes — especially European baking — call for grams instead of cups or ounces for repeatable results.
- Fitness & nutrition
Body weight, protein intake, and gym plates often need conversion between metric and imperial.
- Travel luggage
Airline weight limits are quoted in kilograms internationally but in pounds for many US domestic carriers.
Common mistakes to avoid
- Confusing mass and weight
Mass is constant; weight depends on gravity. On Earth they're proportional, so converters treat them interchangeably.
- Short ton vs metric ton
A US (short) ton is 2,000 lb ≈ 907 kg. A metric ton is exactly 1,000 kg ≈ 2,205 lb.
- Stone equals 14 pounds
Body weight in the UK is often given in stone — 11 st 4 lb means 158 lb, not 11.4.
Did you know?
In 2019 the kilogram stopped being defined by a physical platinum-iridium cylinder and switched to a fixed value of Planck's constant.
A troy ounce — used for precious metals — is about 31.1 g, around 10% heavier than the everyday avoirdupois ounce.
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Accuracy & sources
How this tool is built and verified.
- Source
- Standards-aligned factors
- Last reviewed
- Q2 2026
- Status
- Verified
- International System of Units (SI)BIPM — Bureau International des Poids et Mesures · The International System of Units (SI Brochure), 9th edition
- Handbook 44 — Weights & MeasuresNIST / National Conference on Weights and Measures · NIST Handbook 44
- Standards aligned
- Formula verified
- Editor reviewed
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