How the Weight Converter Works
This converter converts between common metric and imperial weight units, including micrograms, milligrams, grams, kilograms, ounces, and pounds. Enter a value, choose the starting and target units, and the conversion is calculated instantly.
1 pound (lb) = 453.59237 grams (g) 1 ounce (oz) = 28.349523125 grams (g) 1 kilogram (kg) = 1,000 grams (g) 1 gram (g) = 1,000 milligrams (mg) 1 milligram (mg) = 1,000 micrograms (mcg) The international avoirdupois pound is defined as exactly 453.59237 grams. The ounce used in this conversion system is one sixteenth of a pound, or exactly 28.349523125 grams. Metric conversions between kilograms, grams, milligrams, and micrograms are based on powers of 10.
Common weight conversions
These examples cover some of the most common conversions between kilograms, pounds, grams, and ounces.
| From | Equivalent |
|---|---|
| 1 kg | 2.20462 lb |
| 2 kg | 4.40925 lb |
| 5 kg | 11.02311 lb |
| 10 kg | 22.04623 lb |
| 1 lb | 453.59237 g |
| 2 lb | 907.18474 g |
| 5 lb | 2.26796 kg |
| 10 lb | 4.53592 kg |
| 1 oz | 28.34952 g |
| 16 oz | 1 lb |
Metric and imperial weight units
Metric weight units are based on powers of 10, which makes conversions between them straightforward. One kilogram contains 1,000 grams, one gram contains 1,000 milligrams, and one milligram contains 1,000 micrograms.
Pounds and ounces are commonly used in the United States and are also encountered in some other contexts. One pound contains 16 ounces, and one pound equals exactly 453.59237 grams.
If you need to convert between kilograms and pounds specifically, use the KG to LBS converter or the LBS to KG converter. For smaller quantities, the Grams to Ounces converter and Ounces to Grams converter provide direct conversions.
Metric weight conversion chart
| Unit | Equivalent |
|---|---|
| 1 kilogram (kg) | 1,000 g |
| 1 gram (g) | 1,000 mg |
| 1 milligram (mg) | 1,000 mcg |
| 1,000 mcg | 1 mg |
| 1,000 mg | 1 g |
| 1,000 g | 1 kg |
Frequently Asked Questions
How many pounds are in 1 kilogram?
1 kilogram equals approximately 2.20462 pounds. For the exact conversion, 1 kg equals 2.2046226218 pounds.
How many kilograms are in 1 pound?
1 pound equals exactly 0.45359237 kilograms.
How many grams are in an ounce?
1 ounce equals exactly 28.349523125 grams in the avoirdupois system used for common weight measurements.
How many ounces are in a pound?
There are exactly 16 avoirdupois ounces in 1 pound.
What is the difference between mcg and µg?
There is no difference. mcg and µg are two ways of writing microgram. The abbreviation mcg is commonly used where the Greek letter µ may not display clearly.
Are these conversion calculations exact?
The underlying conversion factors are exact for the units used here. Displayed results may be rounded to make them easier to read.