Grams to oz converter
1 gram is 0.035274 ounces. To convert grams to oz, divide the grams by 28.3495.
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100 grams =
3.5274oz
Formula: oz = g ÷ 28.34952313
Show the steps
- Definition: 1 g = 0.001 kg; 1 oz = 28.349523125 g exactly (1/16 lb)
- 100 g ÷ 28.34952313 = 3.5274 oz
Definitions used: 1 g = 0.001 kg; 1 oz = 28.349523125 g exactly (1/16 lb).
Source: NIST SP 811, Appendix B.8 and NIST Handbook 44 (2026), Appendix C, checked on .
How to convert grams to ounces
Divide the value in grams by 28.34952313. The factor follows from the definitions: 1 g = 0.001 kg, and 1 oz = 28.349523125 g exactly (1/16 lb).
oz = g ÷ 28.34952313
Worked example: 100 g to oz
- Definition: 1 g = 0.001 kg; 1 oz = 28.349523125 g exactly (1/16 lb)
- 100 g ÷ 28.34952313 = 3.5274 oz
- Answer: 100 g = 3.5274 oz.
Grams to ounces chart
| Grams (g) | Ounces (oz) |
|---|---|
| 1 | 0.035274 |
| 5 | 0.17637 |
| 10 | 0.35274 |
| 15 | 0.529109 |
| 20 | 0.705479 |
| 25 | 0.881849 |
| 30 | 1.05822 |
| 50 | 1.7637 |
| 75 | 2.64555 |
| 100 | 3.5274 |
| 125 | 4.40925 |
| Grams (g) | Ounces (oz) |
|---|---|
| 150 | 5.29109 |
| 200 | 7.05479 |
| 225 | 7.93664 |
| 250 | 8.81849 |
| 300 | 10.5822 |
| 400 | 14.1096 |
| 454 | 16.0144 |
| 500 | 17.637 |
| 750 | 26.4555 |
| 1,000 | 35.274 |
Values rounded to 6 significant digits. Type any other number in the converter at the top of the page.
How many ounces is 100 grams?
100 g is 3.527 oz, about three and a half ounces. 250 g is 8.818 oz and 500 g is 17.64 oz (1 lb 1.6 oz).
How do you estimate grams in ounces?
Divide by 30 for a fast answer and by 28 for a closer one. 140 g ÷ 28 = 5 oz; the exact value is 4.938 oz.
More questions about grams and ounces
How many grams are in an ounce?
Exactly 28.349523125 g in one avoirdupois ounce.
How many ounces is 1 kg?
1,000 g is 35.274 oz, which is 2 lb 3.27 oz.
How many ounces is 454 grams?
454 g is 16.014 oz: practically one pound (453.59 g).
Can I convert grams to fluid ounces?
Only if you know the liquid. A fluid ounce is a volume; one US fluid ounce of water weighs about 29.6 g (USDA). For other foods use the cups to grams page.
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Sources and limits
- NIST SP 811, Appendix B.8
NIST Special Publication 811, Guide for the Use of the SI, Appendix B.8: Factors for Units Listed Alphabetically (page updated August 18, 2025).
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
- NIST Handbook 44 (2026), Appendix C
NIST Handbook 44-2026, Appendix C: General Tables of Units of Measurement.
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
This is a calculation aid, not an official measurement service. Results are rounded to 6 significant digits for display. For trade, engineering, medical dosing or legal documents, confirm the figure in the official source. Nothing you type leaves your browser.