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Ounces to Grams

1 ounce = 28.35 grams · 1 g = 0.035274 oz

1 ounce = 28.35 grams

How it’s calculated

g = oz × 28.34952313

  • Multiply the value in ounces by 28.34952313.
  • To go back, divide by 28.34952313 (or multiply by 0.03527396195).
  • 1 oz = 28.34952313 g · 1 g = 0.03527396195 oz
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 oz = 0.028349523125 kg and 1 g = 0.001 kg, so 1 oz = 28.349523125 g. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.).

  2. Multiply by the factor written as a fraction

    Put oz in the denominator so it cancels, leaving g.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 28.35 g

1 oz in other units

Batch convert oz → g
Results
  1. 1 oz = 28.35 g
  2. 5 oz = 141.75 g
  3. 10 oz = 283.5 g
  4. 25 oz = 708.74 g

Permanent link to this conversion

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Quick examples

  • 1 ounce = 28.35 grams
  • 5 ounces = 141.75 grams
  • 10 ounces = 283.5 grams
  • 25 ounces = 708.74 grams
  • 100 ounces = 2,835 grams

About these units

Ounce (oz)

US & imperial (identical)

Avoirdupois ounce, exactly 1/16 lb = 28.349 523 125 g. Not the same as a fluid ounce (volume).

1 oz = 0.02834952313 kg

Source: NIST SP 811 / Handbook 44

Gram (g)

SI (metric)

Exactly 1/1 000 of a kilogram.

1 g = 0.001 kg

Source: BIPM SI Brochure (9th ed.)

Ounces to grams conversion table

ounce (oz) to gram (g)
Ounces (oz)Grams (g)
0.1 oz2.835 g
0.5 oz14.175 g
1 oz28.35 g
2 oz56.699 g
3 oz85.049 g
4 oz113.4 g
5 oz141.75 g
6 oz170.1 g
7 oz198.45 g
8 oz226.8 g
9 oz255.15 g
10 oz283.5 g
15 oz425.24 g
20 oz566.99 g
25 oz708.74 g
30 oz850.49 g
40 oz1,134 g
50 oz1,417.5 g
75 oz2,126.2 g
100 oz2,835 g
250 oz7,087.4 g
500 oz14,175 g
1,000 oz28,350 g

Related conversions

Frequently asked questions

How do I convert ounces to grams?

Use g = oz × 28.34952313. Multiply the value in ounces by 28.34952313.

How many grams are in 1 ounce?

1 ounce (oz) equals 28.35 grams (g); more precisely 28.34952313.

How many ounces are in 1 gram?

1 gram (g) equals 0.035274 ounces (oz); more precisely 0.03527396195.

What is 10 oz in g?

10 ounces = 283.5 grams.

What is a ounce?

Avoirdupois ounce, exactly 1/16 lb = 28.349 523 125 g. Not the same as a fluid ounce (volume).

What is a gram?

Exactly 1/1 000 of a kilogram.

Formula: g = oz × 28.34952313. Factors last reviewed 2026-10-27.