Updated · Methodology: named formula library
1 oz = 28.35 g. To convert oz to g, multiply by 28.35. To convert g back to oz, multiply by 0.035274.
Ounces to Grams
Convert ounces to grams.
1 oz converts to 28.35 g.
1 oz = 28.3495 g. To convert oz to g, multiply by 28.3495. To go the other direction, multiply g by 0.035274.
How the conversion works
The relationship is linear: every value of oz maps to exactly 28.3495 g, scaling proportionally. 1 ounce (avoirdupois) equals exactly 28.349523125 grams, derived from the 1959 definition of the pound (1 lb = 453.59237 g, 1 lb = 16 oz).
Common conversion values
- 1 oz = 28.3495 g
- 10 oz = 283.5 g
- 100 oz = 2834.95 g
- 1,000 oz = 28,350 g
See the [forward](#chart) and [reverse](#reverse-chart) charts below for additional values.
Quick mental shortcut
Quick estimate: divide grams by 30 for an approximate ounce count.
Accuracy note
The factor used here (28.3495) is rounded to 6 significant figures, which is sufficient for most everyday use including cooking, fitness, height comparisons, and shipping. For scientific, engineering, or trade-regulated contexts, use the full-precision factor or the official defining relationship cited above. Conversions in this calculator are computed at full double-precision; only the displayed values are rounded.
Worked Example
Convert 1 oz to g
- value
- 1
- Result
- 28.3495 g
1 × 28.3495 = 28.3495 g.
oz to g Chart
| oz | g |
|---|---|
| 1 oz | 28.35 g |
| 2 oz | 56.699 g |
| 3 oz | 85.049 g |
| 5 oz | 141.75 g |
| 10 oz | 283.5 g |
| 20 oz | 566.99 g |
| 25 oz | 708.74 g |
| 50 oz | 1,417.47 g |
| 75 oz | 2,126.21 g |
| 100 oz | 2,834.95 g |
| 200 oz | 5,669.9 g |
| 500 oz | 14,175 g |
| 1,000 oz | 28,350 g |
| 5,000 oz | 141,748 g |
Multiplier: × 28.35
g to oz Chart
| g | oz |
|---|---|
| 1 g | 0.035274 oz |
| 2 g | 0.070548 oz |
| 3 g | 0.105822 oz |
| 5 g | 0.17637 oz |
| 10 g | 0.35274 oz |
| 20 g | 0.70548 oz |
| 25 g | 0.88185 oz |
| 50 g | 1.764 oz |
| 75 g | 2.646 oz |
| 100 g | 3.527 oz |
| 200 g | 7.055 oz |
| 500 g | 17.637 oz |
| 1,000 g | 35.274 oz |
| 5,000 g | 176.37 oz |
Multiplier: × 0.035274
Common Specific Values
10 oz to g
10 oz equals 283.5 g. (10 × 28.35 = 283.5)
25 oz to g
25 oz equals 708.74 g. (25 × 28.35 = 708.74)
50 oz to g
50 oz equals 1,417.47 g. (50 × 28.35 = 1,417.47)
100 oz to g
100 oz equals 2,834.95 g. (100 × 28.35 = 2,834.95)
500 oz to g
500 oz equals 14,175 g. (500 × 28.35 = 14,175)
When to Use This Calculator
- Convert between metric and imperial without searching for factors.
- Verify a unit-aware calculation in engineering, science, or cooking.
- Translate specifications across U.S. and international standards.
Limitations & Common Mistakes
- Results are estimates, real-world outcomes depend on factors not captured in a simplified calculation.
- Always verify critical numbers against an authoritative source or domain expert before acting on them.
Frequently Asked Questions
How do you convert oz to g?
Multiply by 28.3495. So 1 oz = 28.3495 g, and 10 oz = 283.495 g. This conversion factor is exact (or rounded to 2 decimals for practical use).
Where does the 28.3495 come from?
It's the standard SI/US-customary conversion factor for oz → g, defined by NIST and BIPM. The CalcIntel Ounces to Grams uses the same factor your physics textbook, government conversion table, and Wolfram Alpha would use.
How accurate is this conversion?
Mathematically exact. The only loss of precision comes from rounding the displayed result to 2 decimals. For scientific applications requiring more precision, multiply by the factor manually.
Can I convert in the other direction?
Yes — divide by 28.3495 to convert from g back to oz, or use the CalcIntel g-to-oz calculator if available.
Is 100g the same as 4 oz?
100 oz equals 2834.95 g — that's different from 4 oz. Use the chart below for exact values at common quantities.
Why is 1 oz gold 31 grams?
1 oz equals 28.3495 g — that's different from 31 grams. Use the chart below for exact values at common quantities.
Is 1 oz 30 g?
1 oz equals 28.3495 g — that's different from 30 g. Use the chart below for exact values at common quantities.
How many grams is an ounce of 24K gold?
1 oz = 28.3495 g. To convert oz to g, multiply by 28.3495; to convert g back to oz, multiply by 0.035274. See the conversion chart below for ready-made values.
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Source: BLS Consumer Price Index, 2026.