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Ounces to Kilograms (oz to kg)

Convert ounces to kilograms: 1 oz = 0.0283495 kg. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

Formula

1 oz = 0.0283495 kg

kilograms = ounces × 0.02834952313 — reverse: ounces = kilograms × 35.27396195

The factor is derived from the SI definitions of both units (base unit: kg) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.

Worked examples

Ounces to kilograms conversion table

Ounces (oz)Kilograms (kg)
10.0283495
20.056699
30.0850486
40.113398
50.141748
60.170097
70.198447
80.226796
90.255146
100.283495
150.425243
200.56699
250.708738
300.850486
401.13398
501.41748
752.12621
1002.83495
2005.6699
2507.08738
50014.1748
100028.3495

FAQ

How many kilograms are in one ounce?

1 oz = 0.0283495 kg. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

What is the formula to convert ounces to kilograms?

Multiply the value in ounces by 0.02834952313: kilograms = ounces × 0.02834952313. For example, 5 oz = 0.141748 kg.

How do I convert kilograms back to ounces?

Multiply by the inverse factor 35.27396195 (ounces = kilograms × 35.27396195), or use the kilograms-to-ounces page.

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