Weight Converter
A weight converter turns a mass in one unit into another by going through grams: value × grams per source unit ÷ grams per target unit. One pound is exactly 0.45359237 kg, so a kilogram is 2.2046226 lb — 70 kg becomes 154.32 lb, or 11 stone 0.3 pounds.
Method and limits
Enter a complete number; dot decimals are accepted. A decimal comma also works in comma-decimal locales. Blank is unavailable, not zero. No grouping or unit suffixes. Maximum 100 significant digits, exponent −100…100, 256 characters. Display rounds half away from zero to the selected precision. Calculations run in your browser; surrounding site requests still exist.
Result
In stones and pounds:
All Conversions
Paste a spreadsheet column here. Commas, semicolons and spaces work as separators too. First 500 values.
| # | Input | Result |
|---|---|---|
Common Conversions
Reference Table
| From | g | kg | lb | oz |
|---|---|---|---|---|
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How do you convert kilograms to pounds?
Every conversion runs through grams. Multiply your value by the grams in the source unit, then divide by the grams in the target unit. Kilograms to pounds is the pair people search for most: divide the grams by 453.59237, or simply multiply the kilograms by 2.2046226. So 68 kg × 2.2046226 = 149.91 lb. Going the other way, multiply pounds by 0.45359237. That factor is exact by international agreement rather than a measurement, so it never changes and every correct converter uses the same number.
What are the exact weight conversion factors?
Factors marked exact are fixed by definition. The international yard and pound agreement of 1959 sets the pound at exactly 0.45359237 kg, and the ounce, stone and grain all follow from it. The rest are rounded decimals of those definitions. Multiply by the number in the middle column to convert in the direction shown. The troy ounce in the last row is there for bullion arithmetic only; it is not one of the nine units in the converter's menus.
| Conversion | Multiply by | Example |
|---|---|---|
| Pounds → Kilograms | 0.45359237(exact) | 154 lb = 69.85 kg |
| Kilograms → Pounds | 2.2046226 | 70 kg = 154.32 lb |
| Ounces → Grams | 28.349523125(exact) | 8 oz = 226.80 g |
| Grams → Ounces | 0.03527396 | 500 g = 17.64 oz |
| Stones → Pounds | 14(exact) | 11 st = 154 lb |
| Stones → Kilograms | 6.35029318(exact) | 12 st = 76.20 kg |
| Kilograms → Stones | 0.15747304 | 80 kg = 12.60 st |
| Metric Tons → Pounds | 2204.6226 | 1.5 t = 3306.93 lb |
| Grains → Grams | 0.06479891(exact) | 100 gr = 6.48 g |
| Carats → Grams | 0.2(exact) | 1.25 ct = 0.25 g |
| Troy ounces → Grams | 31.1034768(exact) | 1 ozt = 31.10 g |
How do you convert kg to stones and pounds?
British and Irish scales report body weight in stones and pounds, and one stone is exactly 14 pounds. Convert the kilograms to pounds first, then split the result: the whole stones are the pounds divided by 14, and what is left over is the pounds. 70 kg is 154.32 lb, and 154.32 ÷ 14 leaves 11 whole stones with 0.3 lb over, so 70 kg is 11 stone 0.3 pounds. The converter prints that line automatically for any body weight between 20 kg and 500 kg.
| Kilograms | Pounds | Stones and pounds |
|---|---|---|
| 45 kg | 99.2 lb | 7 st 1.2 lb |
| 50 kg | 110.2 lb | 7 st 12.2 lb |
| 55 kg | 121.3 lb | 8 st 9.3 lb |
| 60 kg | 132.3 lb | 9 st 6.3 lb |
| 65 kg | 143.3 lb | 10 st 3.3 lb |
| 70 kg | 154.3 lb | 11 st 0.3 lb |
| 75 kg | 165.3 lb | 11 st 11.3 lb |
| 80 kg | 176.4 lb | 12 st 8.4 lb |
| 85 kg | 187.4 lb | 13 st 5.4 lb |
| 90 kg | 198.4 lb | 14 st 2.4 lb |
| 95 kg | 209.4 lb | 14 st 13.4 lb |
| 100 kg | 220.5 lb | 15 st 10.5 lb |
Is weight the same as mass, and how do you convert it to newtons?
Strictly, mass is how much matter an object contains and weight is the force gravity applies to it. Kilograms, grams, pounds and stones are all mass units, so converting between them gives the same answer on Earth, on the Moon or in orbit. Turning a mass into a force means multiplying by standard gravity: 70 kg × 9.80665 m/s² = 686.5 newtons at sea level. That newton figure changes with location; the 70 kg does not. Scales, shipping labels and recipes all mean mass, which is what this tool converts.
How do you convert ounces to grams for a recipe?
American recipes measure dry ingredients in ounces by weight, and one ounce is exactly 28.349523125 grams. So 8 oz of chocolate is 226.80 g and 1 lb of butter is 453.59 g. The trap is the fluid ounce, which measures volume and not weight: a US fluid ounce is 29.5735 ml and a UK imperial fluid ounce is 28.4131 ml, so neither can be converted with the factors on this page unless the ingredient has the density of water. Weigh the dry ingredients, pour the liquids.
Can a weight converter turn kilograms into litres or millilitres?
Not on its own. Kilograms measure mass and litres measure volume, and the bridge between them is density, which depends on the substance. Water is the easy case everyone relies on: one litre of water weighs almost exactly 1 kg, so 500 ml is 500 g. Everything else differs, and some ingredients differ from themselves: plain flour runs roughly 0.45 to 0.60 kg per litre depending on whether it is sifted or scooped, while olive oil is around 0.92 kg and honey around 1.42 kg. The same litre jug can hold anywhere from half a kilogram to nearly one and a half.
What is a troy ounce and why is it heavier?
Gold, silver and platinum are priced per troy ounce, which is exactly 31.1034768 grams — about 9.7% heavier than the everyday avoirdupois ounce of 28.3495 g. The troy pound is stranger still: it holds only 12 troy ounces, so it weighs 373.24 g against the 453.59 g of a standard pound. When a bullion quote says one ounce it always means the troy ounce, so converting a gold weight with the ordinary ounce understates the metal by about 2.75 g per ounce.
Which units does this weight converter support?
Nine units, in every direction: milligram (mg), gram (g), kilogram (kg), metric ton (t), ounce (oz), pound (lb), stone (st), carat (ct) and grain (gr). The All conversions panel shows your value in all nine at once, and precision runs from 2 to 8 decimal places for laboratory, pharmacy or shipping work. The carat here is the metric carat of 0.2 g used to weigh gemstones, not the karat that describes the purity of gold.
Sources
The definitions and conversion factors on this page come from the standards bodies and the legislation that set them.
- NIST Special Publication 811 — Guide for the Use of the International System of Units, Appendix B conversion factors
- NIST Office of Weights and Measures — SI units: mass, and the definition of the kilogram
- BIPM — The International System of Units (SI Brochure), definition of the kilogram
- Weights and Measures Act 1985, Schedule 1 (United Kingdom) - legal definitions of the pound, stone, grain, metric carat and troy ounce
About Weight Converter
Convert mass units, show stones and pounds, and process a batch. 1 lb = 453.59237 g; 1 oz = 28.349523125 g; 1 st = 14 lb.
1 lb → 453.59237 g; 72.5 kg → 159.835780084 lb (≈).
Illustrative examples; no publication or accuracy certification.
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How to use
Choose units, enter a number, then read or copy the current result.
Pro Tips
- Change the precision to control display rounding.
Frequently Asked Questions
The pound is the international avoirdupois pound, exactly 453.59237 grams. An avoirdupois ounce is 1/16 pound, exactly 28.349523125 grams. A stone is 14 pounds; a troy ounce is not offered.
No. Mass and volume need a substance density to relate them. This converter uses mass factors, not density or gravitational force.