How do I convert lbs and oz to kg?
Type the pounds and the ounces, and the kilograms show as you type. Fill any two of pounds, ounces, and kilograms to find the third.
- Kilograms (kg)
- 3.401943
7 lb 8 oz = 3.401943 kg.
Kilograms (kg): 3.401943. 7 lb 8 oz = 3.401943 kg.
Kilograms (kg) by pounds (lb)
How to calculate
Converts pounds and ounces to kilograms: kg = (lb × 16 + oz) × 0.028349523125.
Example with the default inputs (Pounds (lb) 7, Ounces (oz) 8): 7 lb 8 oz = 3.401943 kg.
Formula: kg = (lb × 16 + oz) × 0.028349523125
- 1 lb = 16 oz = 0.45359237 kg exactly, so 1 oz = 0.028349523125 kg (NIST SP 811). Ounces may be 16 or more.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up.
Worked examples
Each example is checked against the calculator on every build.
- Pounds (lb) 7, Ounces (oz) 8 gives Kilograms (kg) 3.401943.Source: NIST SP 811 (2008), Appendix B.8: 1 lb = 0.45359237 kg, 1 oz = 1/16 lb
- Pounds (lb) 1, Ounces (oz) 0 gives Kilograms (kg) 0.453592.Source: NIST SP 811 (2008), Appendix B.8: 1 lb = 0.45359237 kg, 1 oz = 1/16 lb
- Pounds (lb) 0, Ounces (oz) 16 gives Kilograms (kg) 0.453592.Source: NIST SP 811 (2008), Appendix B.8: 1 lb = 0.45359237 kg, 1 oz = 1/16 lb
Other questions people ask
How do I convert lbs and oz to kg?
Turn the weight into ounces, then multiply by 0.028349523125: kg = (lb × 16 + oz) × 0.028349523125. A pound is exactly 0.45359237 kg and an ounce is 1/16 of it.
What is 7 lb 8 oz in kg?
(7 × 16 + 8) × 0.028349523125 = 120 × 0.028349523125 = 3.401943 kg.
What is 8 lb 3 oz in kg?
131 oz × 0.028349523125 = 3.713788 kg.
Can I type ounces only?
Yes. Set the pounds to 0. 16 oz is 0.453592 kg, the same as 1 lb 0 oz. Ounces of 16 or more are fine.
How do I convert kg back to pounds and ounces?
Use the kg to lbs and oz converter, which gives whole pounds and the ounces left over. On this page, type the kilograms and the pounds, and the ounces show.