How Many Grams Are in an Ounce?

Quick answer: one gram equals 0.035274 ounces (and one ounce is 28.3495 grams). To convert any value, multiply your grams by 0.03527396.

Converting grams to ounces looks trivial until precision matters — then the difference between an approximation and the exact factor shows up. This reference covers the precise conversion, quick estimation tricks, worked examples and complete tables in both directions.

Understanding the units

Gram (g)

The gram is the metric everyday unit for cooking ingredients, letters and jewelry. Originally defined as the mass of a cubic centimeter of water.

Ounce (oz)

The avoirdupois ounce is exactly 28.349523125 grams. It dominates American recipe and food-label weights and is one sixteenth of a pound.

The exact conversion formula

ounces = grams × 0.0352739619

How to convert grams to ounces, step by step

Take your value in grams.
Multiply by 0.03527396 (the number of ounces in one gram).
Round sensibly for your context — engineering needs more decimals than a shopping list.

Worked examples:

5 grams × 0.035274 = 0.17637 ounces
12 grams × 0.035274 = 0.423288 ounces
50 grams × 0.035274 = 1.7637 ounces
365 grams × 0.035274 = 12.875 ounces

Real-world reference points

Useful anchors: a paperclip weighs about a gram, a liter of water exactly one kilogram, a bag of sugar 2.2 pounds (1 kg), an average adult 62 kg globally, and a small car about 1.3 metric tons. When a converted number "feels" wrong against these anchors, double-check your factor.

Quick lookup: 1 to 100 grams in ounces

Scan this list for the exact value you need — each line is computed with the precise conversion factor, not an approximation.

1 gram = 0.035274 ounces
2 grams = 0.070548 ounces
3 grams = 0.105822 ounces
4 grams = 0.141096 ounces
5 grams = 0.17637 ounces
6 grams = 0.211644 ounces
7 grams = 0.246918 ounces
8 grams = 0.282192 ounces
9 grams = 0.317466 ounces
10 grams = 0.35274 ounces
11 grams = 0.388014 ounces
12 grams = 0.423288 ounces
13 grams = 0.458562 ounces
14 grams = 0.493835 ounces
15 grams = 0.529109 ounces
16 grams = 0.564383 ounces
17 grams = 0.599657 ounces
18 grams = 0.634931 ounces
19 grams = 0.670205 ounces
20 grams = 0.705479 ounces
21 grams = 0.740753 ounces
22 grams = 0.776027 ounces
23 grams = 0.811301 ounces
24 grams = 0.846575 ounces
25 grams = 0.881849 ounces
26 grams = 0.917123 ounces
27 grams = 0.952397 ounces
28 grams = 0.987671 ounces
29 grams = 1.0229 ounces
30 grams = 1.0582 ounces
31 grams = 1.0935 ounces
32 grams = 1.1288 ounces
33 grams = 1.164 ounces
34 grams = 1.1993 ounces
35 grams = 1.2346 ounces
36 grams = 1.2699 ounces
37 grams = 1.3051 ounces
38 grams = 1.3404 ounces
39 grams = 1.3757 ounces
40 grams = 1.411 ounces
41 grams = 1.4462 ounces
42 grams = 1.4815 ounces
43 grams = 1.5168 ounces
44 grams = 1.5521 ounces
45 grams = 1.5873 ounces
46 grams = 1.6226 ounces
47 grams = 1.6579 ounces
48 grams = 1.6932 ounces
49 grams = 1.7284 ounces
50 grams = 1.7637 ounces
51 grams = 1.799 ounces
52 grams = 1.8342 ounces
53 grams = 1.8695 ounces
54 grams = 1.9048 ounces
55 grams = 1.9401 ounces
56 grams = 1.9753 ounces
57 grams = 2.0106 ounces
58 grams = 2.0459 ounces
59 grams = 2.0812 ounces
60 grams = 2.1164 ounces
61 grams = 2.1517 ounces
62 grams = 2.187 ounces
63 grams = 2.2223 ounces
64 grams = 2.2575 ounces
65 grams = 2.2928 ounces
66 grams = 2.3281 ounces
67 grams = 2.3634 ounces
68 grams = 2.3986 ounces
69 grams = 2.4339 ounces
70 grams = 2.4692 ounces
71 grams = 2.5045 ounces
72 grams = 2.5397 ounces
73 grams = 2.575 ounces
74 grams = 2.6103 ounces
75 grams = 2.6455 ounces
76 grams = 2.6808 ounces
77 grams = 2.7161 ounces
78 grams = 2.7514 ounces
79 grams = 2.7866 ounces
80 grams = 2.8219 ounces
81 grams = 2.8572 ounces
82 grams = 2.8925 ounces
83 grams = 2.9277 ounces
84 grams = 2.963 ounces
85 grams = 2.9983 ounces
86 grams = 3.0336 ounces
87 grams = 3.0688 ounces
88 grams = 3.1041 ounces
89 grams = 3.1394 ounces
90 grams = 3.1747 ounces
91 grams = 3.2099 ounces
92 grams = 3.2452 ounces
93 grams = 3.2805 ounces
94 grams = 3.3158 ounces
95 grams = 3.351 ounces
96 grams = 3.3863 ounces
97 grams = 3.4216 ounces
98 grams = 3.4568 ounces
99 grams = 3.4921 ounces
100 grams = 3.5274 ounces

Gram to Ounce conversion table

The extended table below covers fractional and large values for quick reference.

Gram (g)	Ounce (oz)
0.01 g	0.00035274 oz
0.05 g	0.001764 oz
0.1 g	0.003527 oz
0.2 g	0.007055 oz
0.25 g	0.008818 oz
0.3 g	0.010582 oz
0.4 g	0.01411 oz
0.5 g	0.017637 oz
0.75 g	0.026455 oz
1 g	0.035274 oz
1.25 g	0.044092 oz
1.5 g	0.052911 oz
1.75 g	0.061729 oz
2 g	0.070548 oz
2.5 g	0.088185 oz
3 g	0.105822 oz
3.5 g	0.123459 oz
4 g	0.141096 oz
4.5 g	0.158733 oz
5 g	0.17637 oz
6 g	0.211644 oz
7 g	0.246918 oz
8 g	0.282192 oz
9 g	0.317466 oz
10 g	0.35274 oz
11 g	0.388014 oz
12 g	0.423288 oz
13 g	0.458562 oz
14 g	0.493835 oz
15 g	0.529109 oz
16 g	0.564383 oz
17 g	0.599657 oz
18 g	0.634931 oz
19 g	0.670205 oz
20 g	0.705479 oz
22 g	0.776027 oz
24 g	0.846575 oz
25 g	0.881849 oz
26 g	0.917123 oz
28 g	0.987671 oz
30 g	1.0582 oz
32 g	1.1288 oz
35 g	1.2346 oz
40 g	1.411 oz
45 g	1.5873 oz
50 g	1.7637 oz
55 g	1.9401 oz
60 g	2.1164 oz
65 g	2.2928 oz
70 g	2.4692 oz
75 g	2.6455 oz
80 g	2.8219 oz
85 g	2.9983 oz
90 g	3.1747 oz
95 g	3.351 oz
100 g	3.5274 oz
110 g	3.8801 oz
120 g	4.2329 oz
125 g	4.4092 oz
150 g	5.2911 oz
175 g	6.1729 oz
200 g	7.0548 oz
250 g	8.8185 oz
300 g	10.5822 oz
350 g	12.3459 oz
400 g	14.1096 oz
450 g	15.8733 oz
500 g	17.637 oz
600 g	21.1644 oz
700 g	24.6918 oz
750 g	26.4555 oz
800 g	28.2192 oz
900 g	31.7466 oz
1,000 g	35.274 oz
1,500 g	52.9109 oz
2,000 g	70.5479 oz
2,500 g	88.1849 oz
5,000 g	176.3698 oz
10,000 g	352.7396 oz

Reverse table: ounces to grams

Ounce (oz)	Gram (g)
0.1 oz	2.835 g
0.25 oz	7.0874 g
0.5 oz	14.1748 g
1 oz	28.3495 g
2 oz	56.699 g
3 oz	85.0486 g
4 oz	113.3981 g
5 oz	141.7476 g
6 oz	170.0971 g
7 oz	198.4467 g
8 oz	226.7962 g
9 oz	255.1457 g
10 oz	283.4952 g
12 oz	340.1943 g
15 oz	425.2428 g
20 oz	566.9905 g
25 oz	708.7381 g
30 oz	850.4857 g
40 oz	1,133.98 g
50 oz	1,417.48 g
60 oz	1,700.97 g
75 oz	2,126.21 g
100 oz	2,834.95 g
150 oz	4,252.43 g
200 oz	5,669.9 g
250 oz	7,087.38 g
500 oz	14,174.76 g
750 oz	21,262.14 g
1,000 oz	28,349.52 g
5,000 oz	141,747.62 g

Reverse lookup: ounces in grams

1 ounce = 28.3495 grams
2 ounces = 56.699 grams
3 ounces = 85.0486 grams
4 ounces = 113.3981 grams
5 ounces = 141.7476 grams
6 ounces = 170.0971 grams
7 ounces = 198.4467 grams
8 ounces = 226.7962 grams
9 ounces = 255.1457 grams
10 ounces = 283.4952 grams
11 ounces = 311.8448 grams
12 ounces = 340.1943 grams
13 ounces = 368.5438 grams
14 ounces = 396.8933 grams
15 ounces = 425.2428 grams
16 ounces = 453.5924 grams
17 ounces = 481.9419 grams
18 ounces = 510.2914 grams
19 ounces = 538.6409 grams
20 ounces = 566.9905 grams
21 ounces = 595.34 grams
22 ounces = 623.6895 grams
23 ounces = 652.039 grams
24 ounces = 680.3886 grams
25 ounces = 708.7381 grams
26 ounces = 737.0876 grams
27 ounces = 765.4371 grams
28 ounces = 793.7866 grams
29 ounces = 822.1362 grams
30 ounces = 850.4857 grams

Common mistakes to avoid

Watch out for the difference between mass and weight in physics contexts, between the avoirdupois ounce (28.35 g) and the troy ounce used for precious metals (31.1 g), and between the US ton (907 kg), UK ton (1,016 kg) and metric ton (1,000 kg) — three different "tons" that are routinely confused.

Precision and rounding

The tables above round to a few decimal places for readability. When you need full precision — engineering drawings, scientific work, legal documents — use the exact factor 0.0352739619 and round only at the very end of your calculation. Rounding intermediate steps is the most common source of conversion drift, especially when several conversions are chained together.

Convert it instantly

Skip the arithmetic entirely: our free Gram to Ounce converter computes any value as you type, and the Ounce to Gram converter handles the reverse direction. For every other weight unit, see the complete weight conversion guide.

Frequently asked questions

How many ounces are in one gram?

Exactly 0.035274 ounces. This factor comes from the internationally agreed definitions of both units.

How do I convert ounces back to grams?

Divide by 0.03527396 — or equivalently multiply by 28.34952313, since one ounce equals 28.3495 grams.

Can I do this conversion in my head?

For estimates, round the factor: one gram ≈ 0.04 ounces. That's usually close enough for shopping or travel; reach for the exact factor when precision matters.

What is 2.5 grams in ounces?

2.5 grams equal 0.088185 ounces. Multiply 2.5 by the factor 0.035274.

What is 500 grams in ounces?

500 grams equal 17.637 ounces (500 × 0.035274).

Where does the conversion factor come from?

Both units are legally defined against the same SI base unit (the kilogram), so the factor 0.0352739619 is a mathematical consequence of those definitions — it is exact, permanent, and the same everywhere in the world.

How Many Grams Are in an Ounce? (g to oz Explained)