Weight and Mass conversion

Convert Ounce to Milligram

1 ounce (oz) equals 28,349.523125000003 milligram (mg). Enter any value below to convert from oz to mg.

Enter a value and choose units. Results update instantly.

1 oz = 28,349.523125 mg

All Mass units

From 1 oz
UnitValue
Kilogram kg 0.0283495231
Gram g 28.349523125
Milligram mg 28,349.523125
Metric ton t 0.0000283495
Pound lb 0.0625
Ounce oz 1
Stone st 0.0044642857
US short ton short ton 0.00003125
Imperial long ton long ton 0.0000279018
Carat ct 141.747615625
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Formula

oz to mg conversion formula

Use this relationship for a direct conversion:

mg = oz x 28,349.523125000003

Worked example

2 oz = 56,699.04625 mg.

International avoirdupois and metric mass definitions are exact; displayed results are rounded only for readability.

Quick reference

Ounce to Milligram table

Ounce (oz)Milligram (mg)
0.01283.49523125
0.12,834.9523125
128,349.523125
256,699.04625
5141,747.615625
10283,495.2312500001
25708,738.078125
501,417,476.15625
1002,834,952.3125
1,00028,349,523.1250000037

From unit

About the ounce

One sixteenth of an international avoirdupois pound.

Symbol: oz

To unit

About the milligram

One millionth of a kilogram.

Symbol: mg

Keep converting

Related conversions

Milligram to OunceReverse this conversion Ounce to Kilogramoz to kgOunce to Gramoz to gOunce to Metric tonoz to tOunce to Poundoz to lbOunce to Stoneoz to stOunce to US short tonoz to short ton

Source

Conversion standard

Definitions are checked against NIST SP 811: Units outside the SI. Calculations use full internal precision before display rounding.

View the complete weight and mass converter

Questions

oz to mg FAQ

How do you convert ounce to milligram?

Use the formula mg = oz x 28,349.523125000003. 1 ounce (oz) equals 28,349.523125000003 milligram (mg).

Is the oz to mg conversion exact?

Both unit definitions use exact factors. Only the displayed decimal may be rounded.