Convert Ounces to Milligrams

Enter your ounce value in the form below to get the value calculated in milligrams.

Results in Milligrams:

1 oz = 28,349.523125 mg

How to Convert Ounces to Milligrams Using an Easy Conversion Formula

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Convert ounces to milligrams with this simple formula:

milligrams = ounces × 28349.523125

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

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