acalculator

How do I convert oz to kg?

Type a value in either box, and the answer shows it in the other unit as you type.

Your numbers

Kilograms (kg)
0.02835

1 oz = 0.02835 kg.

Kilograms (kg): 0.02835. 1 oz = 0.02835 kg.

Kilograms (kg) by ounces (oz)

How to calculate

Converts ounces (oz) to kilograms (kg) and back, with the exact unit definitions.

Example with the default inputs (Ounces (oz) 1): 1 oz = 0.02835 kg.

Formula: kg = oz × 0.028349523125

  • 1 ounce = 0.028349523125 kilograms, from the exact definitions in NIST SP 811.
  • Ounces here are avoirdupois ounces, a weight: 1 oz = 1/16 lb = 28.349523125 g. A US fluid ounce is a volume.
  • The answer shows at most 6 decimal places; the calculation keeps full precision.

Machine-readable copies: Markdown, JSON.

Worked examples

Each example is checked against the calculator on every build.

  1. Ounces (oz) 1 gives Kilograms (kg) 0.02835.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
  2. Ounces (oz) 16 gives Kilograms (kg) 0.453592.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
  3. Kilograms (kg) 0.453592 gives Ounces (oz) 16.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8

Other questions people ask

How many kilograms are in a ounce?

1 ounce is 0.02835 kilograms, from the exact unit definitions (NIST SP 811).

How do I convert oz to kg?

Multiply by 0.02835: kg = oz × 0.028349523125. For example, 1 oz × 0.02835 = 0.02835 kg.

How do I convert kg back to oz?

Multiply by 35.273962, or type the kilograms into the second box and the converter works it out. 1 kilogram is 35.273962 ounces.

Is an ounce here a weight or a volume?

A weight: the avoirdupois ounce, 1/16 of a pound (28.349523125 g exactly). A US fluid ounce (29.57 mL) measures volume, as on cups-to-ounces pages.