Troy ounce to Milligram Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert troy ounces [oz.tr.] to milligrams [mg] or milligrams [mg] to troy ounces [oz.tr.]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert troy ounces to milligrams
There are two simple ways to convert troy ounces [oz.tr.] to milligrams [mg]. In the first calculation method, the value in troy ounces [oz.tr.] is divided by the rounded conversion factor of 3.215 * 10-5. The second method multiplies the value in troy ounces [oz.tr.] by 31,103.4768.
- Milligrams [mg] ≈ troy ounces [oz.tr.] ÷ (3.215 * 10-5)
- Milligrams [mg] = troy ounces [oz.tr.] * 31,103.4768
The calculation method with a rounded conversion value is more suitable for rough conversions from troy ounces [oz.tr.] to milligrams [mg], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert milligrams to troy ounces
Converting milligrams [mg] to troy ounces [oz.tr.] is easy and can be done in two ways. The first method involves multiplication, in which the value in milligrams [mg] is multiplied by the rounded conversion factor of 3.215 * 10-5. The second variant is a division. Here, the value in milligrams [mg] is divided by 31,103.4768.
- Troy ounces [oz.tr.] ≈ milligrams [mg] * 3.215 * 10-5
- Troy ounces [oz.tr.] = milligrams [mg] ÷ 31,103.4768
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from milligrams [mg] to troy ounces [oz.tr.] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.
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To all available units
Troy ounces
Nanograms
Troy ounces
Picograms
Troy ounces
Short hundredweights
Troy ounces
Short tons
Troy ounces
Stone
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