Convert Ounces to Kilograms
4 ounces is 0.11 kg. One ounce is exactly 0.028349523125 kilograms.
4 ounces is 0.11339809 kilograms, because one ounce is 0.028349523 kilograms. To convert ounces to kilograms, multiply by 0.028349523; to go the other way, divide by 0.028349523 or multiply by 35.273962. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. One sixteenth of a pound.
Factor checked against the defining standard · How we check
- Ounces × 0.028349523
4 * 0.02834950.113 kg
4 ounces in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces (as entered) | 4 oz | — |
| pounds | 0.25 lb | × 0.0625 |
| stone | 0.01785714286 st | × 0.00446428571429 |
| US tons | 0.000125 ton | × 0.00003125 |
| micrograms | 113,398,092.5 mcg | × 28,349,523.125 |
| milligrams | 113,398.0925 mg | × 28,349.523125 |
| centigrams | 11,339.80925 cg | × 2,834.9523125 |
| grams | 113.3980925 g | × 28.349523125 |
| kilograms | 0.1133980925 kg | × 0.028349523125 |
| slugs | 0.007770237543 slug | × 0.00194255938572 |
| tonnes | 0.0001133980925 t | × 0.000028349523125 |
| carats | 566.9904625 ct | × 141.747615625 |
| troy ounces | 3.645833333 ozt | × 0.911458333333 |
| grains | 1,750 gr | × 437.5 |
| long tons | 0.0001116071429 LT | × 0.0000279017857143 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert ounces to kilograms? The converter and the working
- 1.Take the measurement in ounces.
- 2.Multiply by 0.028349523 — that is how many kilograms fit in one ounce.
- 3.To go back the other way, divide by 0.028349523, or multiply by 35.273962.
Worked example: 25 ounces to kilograms
- Formula
- oz × 0.028349523 = kg
- Arithmetic
- 25 × 0.028349523 = 0.71 kg
- Answer
- 25 oz = 0.71 kg
The factor is rounded for display; the figure above is computed from the full value.
Ounces to kilograms conversion table
| Ounces | Kilograms |
|---|---|
| 1 oz | 0.03 kg |
| 2 oz | 0.06 kg |
| 3 oz | 0.09 kg |
| 4 oz | 0.11 kg |
| 5 oz | 0.14 kg |
| 6 oz | 0.17 kg |
| 7 oz | 0.2 kg |
| 8 oz | 0.23 kg |
| 9 oz | 0.26 kg |
| 10 oz | 0.28 kg |
| 12 oz | 0.34 kg |
| 15 oz | 0.43 kg |
| 20 oz | 0.57 kg |
| 25 oz | 0.71 kg |
| 50 oz | 1.42 kg |
| 100 oz | 2.83 kg |
| 200 oz | 5.67 kg |
| 300 oz | 8.5 kg |
| 500 oz | 14.17 kg |
| 1000 oz | 28.35 kg |
| 2000 oz | 56.7 kg |
| 5000 oz | 141.75 kg |
| 10000 oz | 283.5 kg |
A troy ounce is ten per cent heavier
This page uses the avoirdupois ounce, 28.349523125 g, which is the ounce on a kitchen scale and a shipping label. Gold, silver and platinum are quoted in troy ounces of 31.1034768 g. Converting a bullion weight with the ordinary factor understates it by about ten per cent.
NIST Handbook 44, Appendix C — general tables of units of measurement
What is an ounce?
One sixteenth of a pound. Not to be confused with the fluid ounce, which measures volume.
What is a kilogram?
The SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
How many kilograms are in an ounce?
One ounce is 0.028349523 kilograms. Going the other way, one kilogram is 35.273962 ounces. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to an ounce.
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- APA
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- Chicago
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Questions people actually ask
- How many kilograms are in an ounce?
- 0.028349523. The SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
- How do I convert kilograms back to ounces?
- Divide by 0.028349523, or multiply by 35.273962 — they are the same operation.
The values people look up
Each one is this page with the value filled in, and each answers in its own title.
Other weight conversions
Kilograms to ounces — the same conversion the other way.