Ounce to Kilogram (oz to kg)
Result
0.02834952313 Kilogram
Formula
kg = oz × 0.02834952313
1 oz = 0.02834952313 kg, and 1 kg = 35.27396195 oz.
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019. The international avoirdupois pound is exactly 0.45359237 kg; the ounce is 1/16 lb and the stone 14 lb.
Worked examples
- 1 oz × 0.02834952313 = 0.028349523 kg
- 10 oz × 0.02834952313 = 0.28349523 kg
- 100 oz × 0.02834952313 = 2.8349523 kg
Common mistakes
- Precious metals use the troy ounce (31.1034768 g), about 10% heavier than the avoirdupois ounce (28.349523125 g) used for food and parcels.
- "Ton" is ambiguous: the metric tonne used here is 1,000 kg, the US short ton 907.18474 kg and the UK long ton 1,016.0469088 kg.
- Kilograms and pounds measure mass. Pound-force (lbf) and newtons measure force — they are not interchangeable with kg.
Ounce to Kilogram table
| Ounce (oz) | Kilogram (kg) |
|---|---|
| 1 | 0.028349523 |
| 2 | 0.056699046 |
| 5 | 0.14174762 |
| 10 | 0.28349523 |
| 20 | 0.56699046 |
| 50 | 1.4174762 |
| 100 | 2.8349523 |
| 1,000 | 28.349523 |
The units
- Ounce (oz)
- The avoirdupois ounce, 1/16 lb = 28.349523125 g. Not the troy ounce used for gold.
- Kilogram (kg)
- The SI base unit of mass, defined through the Planck constant since May 2019.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy