Weight Converter: kg, g, lb, oz, stone, tonne
By Hesaplayıcı
The weight converter converts a weight between milligrams, grams, kilograms, metric tons, ounces, pounds and stones. Enter the value and choose the two units. You get the result and the same weight in all seven units. The factors come from exact definitions: one pound is exactly 0.45359237 kilograms.
Worked example: How many kilograms is 1 pound?
Result
0.45 kg
In other units
- Milligram
- 453,592.37 mg
- Gram
- 453.59 g
- Metric ton (tonne)
- 0.000454 t
- Ounce
- 16 oz
- Pound
- 1 lb
- Stone
- 0.07 st
Step by step
factor = from unit (g) / to unit (g)
factor = 453.59237 / 1,000 = 0.45
Result
result = value × factor
result = 1 × 0.45359237 = 0.45 kg
How to use
- Enter the Weight you want to convert.
- In From, choose the unit of the value.
- In To, choose the unit of the result and press Calculate.
Formula
result = value × factor, where factor = from unit in grams / to unit in grams.
The size of each unit in grams is exact by definition:
- 1 mg = 0.001 g; 1 kg = 1,000 g; 1 metric ton = 1,000 kg
- 1 pound = 453.59237 g (0.45359237 kg)
- 1 ounce = 1/16 pound = 28.349523125 g
- 1 stone = 14 pounds
Worked example
The worked example on this page converts 1 pound to kilograms. The first step gives the factor between the two units; the second gives the result.
Limits
Ounces, pounds and stones are avoirdupois units. The troy ounce, the US short ton and the British long ton are not included. What everyday language calls weight is mass; the converter converts between units of mass. Negative values are not accepted. Results are rounded to 12 significant digits; the page may shorten very small numbers.
Frequently Asked Questions
How many kilograms is a pound?
One pound is exactly 0.45359237 kilograms. The value was fixed by the 1959 international yard and pound agreement.
How many grams is an ounce?
One avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 grams. The troy ounce used for gold and silver is a different unit.
What is a stone?
The stone is a British unit used mostly for body weight. It equals 14 pounds.
How many pounds is a kilogram?
One kilogram is about 2.204623 pounds.
Calculation rules
- Ounces, pounds and stones are avoirdupois units: 1 pound = 0.45359237 kg exactly, 1 ounce = 1/16 pound = 28.349523125 g, 1 stone = 14 pounds = 6.35029318 kg.
- The ton is the metric ton (1,000 kg). The US short ton, the British long ton and the troy ounce used for precious metals are not used.
- What everyday language calls weight is mass; the conversion is between units of mass.
- Results are rounded to 12 significant digits, which only removes tiny floating-point errors. The page may shorten numbers; the API and MCP return all 12 digits.