How to convert milligrams to stones
Milligrams and Stones both measure weight, so converting is a single multiplication. One mg equals 1.5747e-7 st, so you multiply your milligrams value by 1.5747e-7.
Formula: stones = milligrams × 1.5747e-7. For example, 10 mg = 1.5747e-6 st.
Milligrams to Stones conversion table
| Milligrams (mg) | Stones (st) |
|---|---|
| 1 | 1.5747e-7 |
| 2 | 3.1495e-7 |
| 5 | 7.8737e-7 |
| 10 | 1.5747e-6 |
| 25 | 3.9368e-6 |
| 50 | 7.8737e-6 |
| 100 | 0.000016 |
| 1,000 | 0.000157 |
Milligrams and Stones explained
Milligrams (mg): One-thousandth of a gram, used for medication doses and nutrition labels.
Stones (st): Fourteen pounds (6.35 kg), used for body weight in the UK and Ireland.
When you'd convert milligrams to stones
You'll convert milligrams to stones whenever a measurement is given in one unit but you need it in the other — comparing milligrams and stones figures across regions, following a recipe or spec, or double-checking a number. Because 1 mg is exactly 1.5747e-7 st, the result is precise every time.
Frequently asked questions
How many stones are in a milligram?
One mg equals 1.5747e-7 st. Multiply your milligrams figure by 1.5747e-7 to get stones.
What is the formula to convert milligrams to stones?
stones = milligrams × 1.5747e-7. The factor 1.5747e-7 is exact.
What is 2 milligrams in stones?
2 mg = 3.1495e-7 st. You can enter any value in the converter above to get an instant result.
Is this Milligrams to Stones converter accurate?
Yes. It uses the standard conversion factor (1 mg = 1.5747e-7 st) defined by BIPM — SI Brochure (definition of the kilogram), so results are exact to several decimal places.