Scales are used to measure weight

Convert Ounces to Milligrams

Convert from ounces to milligrams with this simple formula:
milligrams = ounces × 28349.523125
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1 Ounce = 28,349.523125 Milligrams

Learn How to Convert Ounces to Milligrams Using our Conversion Formula

Converting an ounce weight measurement to a milligram measurement involves multiplying your weight by the conversion ratio to find the result. An ounce is equal to 28349.523125 milligrams, so to convert simply multiply by 28349.523125.

For example, 5oz = (5 × 28349.523125) = 141,747.615625mg.

Ounces and milligrams are both units used to measure weight. Learn more about weight and find more weight measurement conversion calculators. An ounce is an imperial measurement and can be abbreviated as oz, for example 1oz. A milligram is a metric measurement and can be abbreviated as mg, for example 1mg. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

ounces and milligrams are units used to measure weight
Convert Milligrams to Ounces

More Weight Conversions

Convert to Tons Weight
1oz is equal to 3.125E-5 tons
Convert to Pounds Weight
1oz is equal to 0.0625 pounds
Convert to Metric Tons Weight
1oz is equal to 2.835E-5 metric tons
Convert to Kilograms Weight
1oz is equal to 0.02835 kilograms
Convert to Grams Weight
1oz is equal to 28.349523 grams
Convert to Carats Weight
1oz is equal to 141.747616 carats

Ounce Measurements and Equivalent Milligram Conversions

Common ounce values converted to the equivalent milligram value
Ounces Milligrams Ounces Milligrams Ounces Milligrams
1 28,350 21 595,340 41 1,162,330
2 56,699 22 623,690 42 1,190,680
3 85,049 23 652,039 43 1,219,029
4 113,398 24 680,389 44 1,247,379
5 141,748 25 708,738 45 1,275,729
6 170,097 26 737,088 46 1,304,078
7 198,447 27 765,437 47 1,332,428
8 226,796 28 793,787 48 1,360,777
9 255,146 29 822,136 49 1,389,127
10 283,495 30 850,486 50 1,417,476
11 311,845 31 878,835 51 1,445,826
12 340,194 32 907,185 52 1,474,175
13 368,544 33 935,534 53 1,502,525
14 396,893 34 963,884 54 1,530,874
15 425,243 35 992,233 55 1,559,224
16 453,592 36 1,020,583 56 1,587,573
17 481,942 37 1,048,932 57 1,615,923
18 510,291 38 1,077,282 58 1,644,272
19 538,641 39 1,105,631 59 1,672,622
20 566,990 40 1,133,981 60 1,700,971