Explanation
Pounds, ounces and kilograms
Convert between metric masses and avoirdupois pounds and ounces, the everyday units on kitchen and bathroom scales. Everyday speech calls this weight; the arithmetic is the same.
y = x × k
| x | value in the unit you convert from |
|---|---|
| k | conversion factor: kilograms per source unit ÷ kilograms per target unit |
| y | value in the unit you convert to |
1 pound to kilograms
| Value | 1 |
|---|---|
| From | Pounds (lb) |
| To | Kilograms (kg) |
| Result | 0.45359237 kg |
1 lb = 0.45359237 kg
1 kilogram to grams
| Value | 1 |
|---|---|
| From | Kilograms (kg) |
| To | Grams (g) |
| Result | 1,000 g |
1 kg = 1,000 g
16 ounces to pounds
| Value | 16 |
|---|---|
| From | Ounces (oz) |
| To | Pounds (lb) |
| Result | 1 lb |
16 oz = 1 lb
Diagram of this result
The marker shows the entered mass on a scale in the source unit; the scale below it is drawn in the target unit, so the reading under the marker is the answer.
The answer and the steps state both values with their unit symbols.
Definitions and limits
One pound is exactly 0.45359237 kg and one ounce is exactly 1/16 lb (28.349523125 g). Troy ounces, used for precious metals, are not offered. Answers are shown to six significant figures; the calculation keeps every digit.
Common mistakes
A fluid ounce measures volume, not mass, so it cannot be converted here. A pound of flour and a pound of water fill different cups; converting to cups needs the ingredient's density.
How many kilograms is a pound?
Exactly 0.45359237 kg, a little under half a kilogram. So 150 lb is about 68.04 kg, and 1 kg is about 2.205 lb.
References
NIST SP 811, Guide for the Use of the International System of Units, including its conversion factors: https://www.nist.gov/pml/special-publication-811.