Milligram to Stone (mg to st)
Result
1.574730444e-7 Stone
Formula
st = mg × 1.574730444e-7
1 mg = 1.574730444e-7 st, and 1 st = 6,350,293.18 mg.
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019. The international avoirdupois pound is exactly 0.45359237 kg; the ounce is 1/16 lb and the stone 14 lb.
Worked examples
- 1 mg × 1.574730444e-7 = 1.5747304e-7 st
- 10 mg × 1.574730444e-7 = 0.00000157473 st
- 100 mg × 1.574730444e-7 = 0.000015747304 st
Common mistakes
- Precious metals use the troy ounce (31.1034768 g), about 10% heavier than the avoirdupois ounce (28.349523125 g) used for food and parcels.
- "Ton" is ambiguous: the metric tonne used here is 1,000 kg, the US short ton 907.18474 kg and the UK long ton 1,016.0469088 kg.
- Kilograms and pounds measure mass. Pound-force (lbf) and newtons measure force — they are not interchangeable with kg.
Milligram to Stone table
| Milligram (mg) | Stone (st) |
|---|---|
| 1 | 1.5747304e-7 |
| 2 | 3.1494609e-7 |
| 5 | 7.8736522e-7 |
| 10 | 0.00000157473 |
| 20 | 0.000003149461 |
| 50 | 0.000007873652 |
| 100 | 0.000015747304 |
| 1,000 | 0.00015747304 |
The units
- Milligram (mg)
- One millionth of a kilogram (0.001 g).
- Stone (st)
- 14 pounds, exactly 6.35029318 kg. Used for body weight in the UK and Ireland.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy