Ounces to Pounds Converter — oz to lb, kg, Stones
Convert ounces to decimal pounds, whole lb + oz format, kilograms, grams and stones — all using the exact international avoirdupois definitions.
oz
Decimal pounds — 16 oz = 1 lb (exact)
- 1
Pounds per ounce
1 ÷ 16 = 0.0625Exact avoirdupois definition: 16 oz = 1 lb. - 2
Pounds
32 ÷ 16 = 2
How does this calculator work?
Pounds = ounces ÷ 16 (16 oz = 1 lb exactly). kg = oz × 0.028350. Common: 8 oz = ½ lb = 227 g, 16 oz = 1 lb = 454 g, 32 oz = 2 lb = 907 g. Converter also shows the UK stones format (1 stone = 14 lb = 224 oz) and kilograms.
Formula
How this is calculated
The international avoirdupois system defines exactly 16 ounces to a pound, and the pound is defined as exactly 0.45359237 kg. From those two exact values: 1 oz = 1/16 lb; 1 oz = 0.45359237/16 kg = 0.028349523125 kg = 28.349523125 g. All conversions here use those exact factors — nothing is approximated until the display step.
The stone (14 pounds = 224 ounces) is still commonly used for body weight in the United Kingdom and Ireland. The calculator decomposes your total into stones, remaining whole pounds and remaining ounces for quick reading.
Common reference points: 8 oz = ½ lb ≈ 226.8 g; 16 oz = 1 lb ≈ 453.6 g; 32 oz = 2 lb ≈ 907.2 g; 80 oz = 5 lb ≈ 2.268 kg.
Frequently asked questions
There are exactly 16 avoirdupois ounces in one pound. This is the standard used in the US and UK for everyday weight. (The troy system used for precious metals has 12 troy ounces per troy pound — a different unit.)
24 oz ÷ 16 = 1.5 lb = 1 lb 8 oz. In metric: 24 × 28.3495 ≈ 680.4 g or 0.680 kg. Enter 24 above to see the full breakdown.
A stone equals exactly 14 pounds (224 oz ≈ 6.35 kg). It is used for adult body weight in the UK and Ireland but not in the US or metric countries.
Also known as
TG we-Calculate Editorial Team. (2026). Ounces to Pounds Converter — oz to lb, kg, Stones [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/ounces-to-pounds-converter
TG we-Calculate Editorial Team. "Ounces to Pounds Converter — oz to lb, kg, Stones." TG we-Calculate. 2026. https://we-calculate.com/calculator/ounces-to-pounds-converter.
TG we-Calculate Editorial Team, "Ounces to Pounds Converter — oz to lb, kg, Stones," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/ounces-to-pounds-converter
@misc{wecalculate_ounces_to_pounds_converter, title = {Ounces to Pounds Converter — oz to lb, kg, Stones}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/ounces-to-pounds-converter}}, year = {2026}, note = {TG we-Calculate} }
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