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Ounces to kg Converter

Convert ounces to kg and back — 0.0283495 kg per ounce (35.2739619 oz per kg). Everything runs instantly in your browser; nothing is uploaded.

Convert ounces ⇄ kilograms

0.4536 kg
16 oz = 0.4536 kg (1 oz = 0.0283495 kg)

Formula: 16 oz × 0.0283495 = 0.4536 kg

How the ounces to kg conversion works

The converter applies kg = ounces × 0.0283495. The avoirdupois ounce is standardised at 28.3495 g, so one ounce is 28.3495 ÷ 1000 = 0.0283495 kg. Going the other way, ounces = kg ÷ 0.0283495, i.e. kg × 35.2739619 (≈ 35.274).

Worked example: 16 oz — one full pound — is 16 × 0.0283495 = 0.453592 kg. A 2 kg bag of flour is 2 × 35.2739619 = 70.5479 oz. And 100 oz is 2.83495 kg.

Parcel weights often sit between the two systems: a 12 oz package is 0.340194 kg (≈ 0.34 kg). For finer kitchen weights in grams, use our ounces to grams converter, and for the reverse direction, the kg to ounces converter.

ounces to kg questions

How many kg are in an ounce?
One avoirdupois ounce is 0.0283495 kg, i.e. 28.3495 g. That is the rounded standard used by postal scales, kitchens and this converter.
How do I convert ounces to kg?
Multiply by 0.0283495: kg = ounces × 0.0283495. So 100 oz is 100 × 0.0283495 = 2.83495 kg, and 16 oz (one pound) is 0.453592 kg. Type any figure above.
How do I convert kg back to ounces?
Divide by 0.0283495 — equivalently, multiply by 35.2739619 ≈ 35.274: oz = kg × 35.2739619. So 2 kg is 2 × 35.2739619 = 70.5479 oz. Switch the direction above to do it.
How many ounces are in half a kilogram?
Half a kilogram is 0.5 × 35.2739619 ≈ 17.637 oz — a handy kitchen benchmark: 500 g is 17.637 oz, 250 g is 8.818 oz.
How much is a 12 oz parcel in kg?
12 oz × 0.0283495 = 0.340194 kg, i.e. about 0.34 kg (340 g). Postage scales often weigh in ounces and charge by the kilogram, so this is the conversion couriers expect you to do.

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Sources & official guidance

Estimate only — conversions use 1 oz = 28.3495 g. See our disclaimer.