Convert between kilograms, pounds, stones, ounces and tonnes. Free, exact, and it works without an internet connection.
Every unit in this converter carries one number, its size in kilograms. The kilogram is the base, and its own number is 1. A gram is 0.001. A pound is 0.45359237.
A conversion is two steps. The tool multiplies your value by the number of the unit you entered, which gives the mass in kilograms. It then divides by the number of the unit you asked for.
result = value * fromFactor / toFactor
Both fields accept a number. Type into the second field and the first one follows, so a conversion runs in either direction.
Seven units are available: kilogram, gram, milligram, metric tonne, pound, ounce and stone. Each one also answers to its symbol and common names, so lbs finds the pound and kilos finds the kilogram.
A result is rounded to 12 significant digits. The whole conversion runs in your browser.
70 kilograms is 154.323583529 pounds. The same weight is 11.0231131092 stone.
Read it the other way and 150 pounds is 68.0388555 kilograms. 200 pounds is 90.718474 kilograms, and 80 kilograms is 12.5978435534 stone.
100 grams is 3.52739619496 ounces. One ounce is 28.349523125 grams, and one kilogram is 35.2739619496 ounces.
A pound holds exactly 16 ounces and weighs 453.59237 grams. Half a kilogram, 500 grams, is 1.10231131092 pounds.
2.20462262185 pounds. The reverse is exact: 1 pound is 0.45359237 kilograms. For larger weights, 5 kilograms are 11.0231131092 pounds and 100 kilograms are 220.462262185 pounds.
6.35029318 kilograms. A stone is exactly 14 pounds and 224 ounces. A weight of 70 kilograms is 11.0231131092 stone, and 10 stone is 63.5029318 kilograms.
The metric tonne only, which is exactly 1,000 kilograms. There is no short ton and no long ton in the unit list. Enter the weight in pounds to reach either one. A US short ton of 2,000 pounds is 907.18474 kilograms, or 0.90718474 metric tonnes. A long ton of 2,240 pounds is 1016.0469088 kilograms, or 1.0160469088 metric tonnes.
The avoirdupois ones, the pair used for food, freight and body weight. The pound is 0.45359237 kilograms and holds 16 ounces. The troy ounce used for precious metals is a different weight, and this converter does not offer it. There is no carat and no grain either.
Mass. A kilogram, a gram and a pound here all name an amount of matter, and that amount does not change with location. Weight is the force gravity applies to that mass, so it does change. In daily use the two words are one, and these are the numbers a scale reports.
No. There is no account, and nothing you type reaches a server. The application is stored in the browser after your first visit, so the converter works with no internet connection. No result is written down.
The pound is exactly 0.45359237 kilograms. The international yard and pound agreement of 1959 fixed that number, and this converter uses it. The ounce and the stone follow from it exactly, so pound to kilogram is a definition rather than a measurement. Kilogram to pound is that definition read backwards, and 2.20462262185 is a rounded view of it.
Common weight conversions:
Rounding is easy to see at the small end. Convert 1 gram to milligrams and the answer is 1000, which is right. The arithmetic behind it lands a fraction above 1000, because a computer holds 0.001 in binary. The rounding at 12 significant digits removes the difference.
The nine converters share one workspace, so a value typed here is still in the field when you open another measurement. For what a container holds rather than what it weighs, use the Volume Converter. For arithmetic on a result, use the Calculator.