Stone to Milligram Conversion Calculator: Free Online Tool
Convert stones to milligrams with our free online weight converter.
Stone to Milligram Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Stone).
- The converted value in Milligram will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Weight category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Stone to Milligram
Converting Stone to Milligram involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Stone = 6350290 milligramsExample Calculation:
Convert 5 stones: 5 × 6350290 = 31751500 milligrams
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Stone and a Milligram?
The stone (st) is a unit of mass in the British imperial system, defined as exactly 14 avoirdupois pounds. This is equivalent to approximately 6.35 kilograms.
The milligram is a unit of mass in the metric system equal to one-thousandth of a gram (1/1000 g) or one-millionth of a kilogram (1/1,000,000 kg). It is commonly used for measuring very small quantities.
Note: The Stone is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Milligram belongs to the metric (SI) system.
History of the Stone and Milligram
The stone has historical roots in trade, where actual stones were used as weights. Its value varied significantly by commodity and region before being standardized at 14 pounds in Britain for general purposes.
Like the gram, the milligram's definition is derived directly from the kilogram. Its use became prevalent with the need for precise measurements in science and medicine as the metric system was adopted globally.
Common Uses for stones and milligrams
Explore the typical applications for both Stone (imperial/US) and Milligram (metric) to understand their common contexts.
Common Uses for stones
- Body Weight: Primarily used in the UK and Ireland to express human body weight.
- Animal Weighing: Occasionally used informally for weighing large animals or agricultural produce in some Commonwealth countries.
- Historical Usage: Largely historical or colloquial use outside of body weight context.
Common Uses for milligrams
- Pharmaceuticals: Measuring the dosage of medications, pills, and active ingredients in drugs.
- Scientific Research: Common unit for mass measurements in chemistry labs, biology, and physics experiments for very small quantities.
- Nutrition & Supplements: Used for labeling the content of vitamins, minerals, and other nutrients in dietary supplements.
- Precision Manufacturing: Weighing very lightweight items like microelectronic components, fine powders, or precious materials.
- Analytical Chemistry: Standard unit for quantifying trace elements and compounds in samples.
Frequently Asked Questions
Questions About Stone (st)
How many pounds are in a stone?
There are 14 pounds (lb) in 1 stone (st).
Is the stone used outside the UK and Ireland?
Its use is very limited outside the UK and Ireland, mainly for historical context or by people familiar with imperial body weight measurements.
Why is it called a stone?
The name originates from the historical practice of using stones of a standardized size as weight standards in trade.
About Milligram (mg)
How many milligrams are in a gram?
There are 1,000 milligrams (mg) in 1 gram (g).
Is the milligram used in everyday life?
Its most common everyday use is in medication dosages and supplement information. It's less common for general weighing compared to grams or kilograms.
What does 'milli' mean in milligram?
The prefix 'milli' denotes one-thousandth (1/1000).
Conversion Table: Stone to Milligram
| Stone (st) | Milligram (mg) |
|---|---|
| 1 | 6,350,293.18 |
| 5 | 31,751,465.9 |
| 10 | 63,502,931.8 |
| 25 | 158,757,329.5 |
| 50 | 317,514,659 |
| 100 | 635,029,318 |
| 500 | 3,175,146,590 |
| 1,000 | 6,350,293,180 |
All Weight Conversions
Other Units from Weight
- Kilogram (kg)
- Gram (g)
- Pound (lb)
- Ounce (oz)
- Ton (metric) (t)
- Ton (US) (ton)
- Ton (UK) (long ton)
- Microgram (µg)
- Carat (ct)
- Slug (sl)
- Troy Ounce (oz t)
- Pennyweight (dwt)
- Grain (gr)
- Dram (dr)
- Quintal (q)
- Atomic Mass Unit (u)
- Pavan (India) (pavan)
- Kati (India) (kati)
- Masha (India) (masha)
- Dina (India) (dina)
- Pras (India) (pras)
- Lota (India) (lota)