How do you convert ounces to grams?
Multiply the number of ounces by 28.35. For quick mental math, count 30 g per ounce and knock off 5%: 8 oz → 240 − 12 = 228 g, against an exact 226.8 g.
ounces = grams ÷ 28.35
Common recipe quantities
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 4 oz (1/4 lb) | 113.40 g |
| 8 oz (1/2 lb) | 226.80 g |
| 12 oz | 340.19 g |
| 16 oz (1 lb) | 453.59 g |
| 32 oz | 907.18 g |
Show every value
- 1 oz = 28.35 g
- 2 oz = 56.7 g
- 3 oz = 85.05 g
- 4 oz = 113.4 g
- 5 oz = 141.75 g
- 6 oz = 170.1 g
- 7 oz = 198.45 g
- 8 oz = 226.8 g
- 9 oz = 255.15 g
- 10 oz = 283.5 g
- 11 oz = 311.84 g
- 12 oz = 340.19 g
- 13 oz = 368.54 g
- 14 oz = 396.89 g
- 15 oz = 425.24 g
- 16 oz = 453.59 g
- 17 oz = 481.94 g
- 18 oz = 510.29 g
- 19 oz = 538.64 g
- 20 oz = 566.99 g
- 21 oz = 595.34 g
- 22 oz = 623.69 g
- 23 oz = 652.04 g
- 24 oz = 680.39 g
- 25 oz = 708.74 g
- 26 oz = 737.09 g
- 27 oz = 765.44 g
- 28 oz = 793.79 g
- 29 oz = 822.14 g
- 30 oz = 850.49 g
- 31 oz = 878.84 g
- 32 oz = 907.18 g
- 33 oz = 935.53 g
- 34 oz = 963.88 g
- 35 oz = 992.23 g
- 36 oz = 1,020.58 g
- 37 oz = 1,048.93 g
- 38 oz = 1,077.28 g
- 39 oz = 1,105.63 g
- 40 oz = 1,133.98 g
- 41 oz = 1,162.33 g
- 42 oz = 1,190.68 g
- 43 oz = 1,219.03 g
- 44 oz = 1,247.38 g
- 45 oz = 1,275.73 g
- 46 oz = 1,304.08 g
- 47 oz = 1,332.43 g
- 48 oz = 1,360.78 g
- 49 oz = 1,389.13 g
- 50 oz = 1,417.48 g
- 51 oz = 1,445.83 g
- 52 oz = 1,474.18 g
- 53 oz = 1,502.52 g
- 54 oz = 1,530.87 g
- 55 oz = 1,559.22 g
- 56 oz = 1,587.57 g
- 57 oz = 1,615.92 g
- 58 oz = 1,644.27 g
- 59 oz = 1,672.62 g
- 60 oz = 1,700.97 g
- 61 oz = 1,729.32 g
- 62 oz = 1,757.67 g
- 63 oz = 1,786.02 g
- 64 oz = 1,814.37 g
- 65 oz = 1,842.72 g
- 66 oz = 1,871.07 g
- 67 oz = 1,899.42 g
- 68 oz = 1,927.77 g
- 69 oz = 1,956.12 g
- 70 oz = 1,984.47 g
- 71 oz = 2,012.82 g
- 72 oz = 2,041.17 g
- 73 oz = 2,069.52 g
- 74 oz = 2,097.86 g
- 75 oz = 2,126.21 g
- 76 oz = 2,154.56 g
- 77 oz = 2,182.91 g
- 78 oz = 2,211.26 g
- 79 oz = 2,239.61 g
- 80 oz = 2,267.96 g
- 81 oz = 2,296.31 g
- 82 oz = 2,324.66 g
- 83 oz = 2,353.01 g
- 84 oz = 2,381.36 g
- 85 oz = 2,409.71 g
- 86 oz = 2,438.06 g
- 87 oz = 2,466.41 g
- 88 oz = 2,494.76 g
- 89 oz = 2,523.11 g
- 90 oz = 2,551.46 g
- 91 oz = 2,579.81 g
- 92 oz = 2,608.16 g
- 93 oz = 2,636.51 g
- 94 oz = 2,664.86 g
- 95 oz = 2,693.2 g
- 96 oz = 2,721.55 g
- 97 oz = 2,749.9 g
- 98 oz = 2,778.25 g
- 99 oz = 2,806.6 g
- 100 oz = 2,834.95 g
- 125 oz = 3,543.69 g
- 150 oz = 4,252.43 g
- 175 oz = 4,961.17 g
- 200 oz = 5,669.9 g
- 225 oz = 6,378.64 g
- 250 oz = 7,087.38 g
- 275 oz = 7,796.12 g
- 300 oz = 8,504.86 g
- 325 oz = 9,213.6 g
- 350 oz = 9,922.33 g
- 375 oz = 10,631.07 g
- 400 oz = 11,339.81 g
- 425 oz = 12,048.55 g
- 450 oz = 12,757.29 g
- 475 oz = 13,466.02 g
- 500 oz = 14,174.76 g
- 550 oz = 15,592.24 g
- 600 oz = 17,009.71 g
- 650 oz = 18,427.19 g
- 700 oz = 19,844.67 g
- 750 oz = 21,262.14 g
- 800 oz = 22,679.62 g
- 850 oz = 24,097.09 g
- 900 oz = 25,514.57 g
- 950 oz = 26,932.05 g
- 1,000 oz = 28,349.52 g
- 1,500 oz = 42,524.28 g
- 2,000 oz = 56,699.05 g
- 2,500 oz = 70,873.81 g
- 3,000 oz = 85,048.57 g
- 3,500 oz = 99,223.33 g
- 4,000 oz = 113,398.09 g
- 4,500 oz = 127,572.85 g
- 5,000 oz = 141,747.62 g
- 5,500 oz = 155,922.38 g
- 6,000 oz = 170,097.14 g
- 6,500 oz = 184,271.9 g
- 7,000 oz = 198,446.66 g
- 7,500 oz = 212,621.42 g
- 8,000 oz = 226,796.19 g
- 8,500 oz = 240,970.95 g
- 9,000 oz = 255,145.71 g
- 9,500 oz = 269,320.47 g
- 10,000 oz = 283,495.23 g
The ordinary ounce, called avoirdupois to distinguish it from the troy ounce used for precious metals, is exactly 28.349523125 g, one sixteenth of the international pound (453.59237 g) fixed by the 1959 agreement. Methodology & sources.
Frequently asked questions
How many grams is 1 ounce?
1 avoirdupois ounce equals 28.35 grams. It is one sixteenth of a pound, which is why American recipes switch from 16 oz to 1 lb for the same amount.
Is the troy ounce for gold the same?
No. The troy ounce, used for precious metals, is 31.103 g, nearly 10% heavier than the avoirdupois ounce in recipes. A one-ounce bullion bar weighs more than an ounce of flour.
Is a fluid ounce (fl oz) the same thing?
No: a fluid ounce measures volume (29.57 ml in the US), not weight. A recipe listing fl oz means liquid measured in a jug, not on a scale.
What does 12 oz on a pair of jeans mean?
Not 12 ounces of fabric, but 12 ounces per square yard, which is a surface density. One ounce per square yard is 33.9 g/m², so 12 oz denim weighs about 407 g/m². On a boxing glove, by contrast, 10 oz really is a mass: 283 g per glove.
What does the ounce divide into?
Into 16 drams or 437.5 grains, the grain being exactly 64.79891 mg. The grain has not gone away: the American 325 mg aspirin tablet is the old 5-grain tablet, 324 mg rounded up, and water hardness is still rated in grains per gallon in the United States, one grain per gallon being 17.1 mg per litre.