A stone is a unit of weight used primarily in the United Kingdom and Ireland to measure body weight. One stone equals 14 pounds or approx. 6.35 kilograms. It's not part of the official metric or imperial systems, but it remains a widely recognized standard in health, fitness, and everyday conversation in the UK. If someone says they weigh "11 stone," they mean 154 pounds (11 × 14).
The stone has historical roots going back to ancient Europe, where stones of specific weight were used in trade. Over time, England standardized the stone to mean 14 pounds in 1835, and that value is still used today. While most countries have adopted the metric system, the stone remains part of British culture—primarily when referring to personal weight.
How is the Stone Used: The stone is most commonly used to express body weight in the UK and Ireland. You'll often hear weights given in stone and pounds together, like "11 stone 4 pounds" instead of 158 pounds or 71.6 kg. It's rarely used in scientific, industrial, or commercial applications today. The metric system has replaced it in those contexts.
A milligram (mg) is a unit of mass in the metric system, equal to one-thousandth of a gram (1 mg = 0.001 g). It's one of the smallest standard units used in everyday measurements and is essential when dealing with very light weights. Milligrams are especially useful for measuring things that are too small to be weighed in grams—like medication doses, vitamins, or trace ingredients in scientific experiments.
The word "milligram" is derived from Latin roots: milli-, meaning "one-thousandth," and gramma meaning "a small weight." It became part of the International System of Units (SI) as countries adopted metric standards for more precise and consistent measurements.
How is the Milligram Used: The milligram plays a vital role in fields where accuracy matters most. Because it's a tiny measurement, even slight errors can affect results—especially in health and science.
1 st = 6350293.18 mg
Let’s say you want to convert 100 st to mg.
Using the formula:
100 × 6350293.18 = 635029318 mg
So, 100 st is approximately 635029318 mg.
| Stone (st) | Milligram (mg) |
|---|---|
| 1 st | 6350293.18 mg |
| 2 st | 12700586.36 mg |
| 3 st | 19050879.54 mg |
| 4 st | 25401172.72 mg |
| 5 st | 31751465.9 mg |
| 6 st | 38101759.08 mg |
| 7 st | 44452052.26 mg |
| 8 st | 50802345.44 mg |
| 9 st | 57152638.62 mg |
| 10 st | 63502931.8 mg |
| 11 st | 69853224.98 mg |
| 12 st | 76203518.16 mg |
| 13 st | 82553811.34 mg |
| 14 st | 88904104.52 mg |
| 15 st | 95254397.7 mg |