Grain to Stone Converter
Weight · unit-converter
Convert Grain to Stone with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Grain (gr)
To: Stone (st)
About Grain
The grain is 1/7000 of a pound (exactly 64.79891 mg). It is used in ballistics, pharmacy, and precious-metal contexts.
About Stone
The stone is 14 pounds (UK and Ireland). It is often used for human body weight in those regions.
How to convert grains to stone
1 grain is equal to 0.00001020408163 stone:
1 gr = (0.06479891 g ÷ 6350.29318 g) st = 0.00001020408163 st
Each grain is defined as 0.06479891 g and each stone as 6350.29318 g, so one gr equals 0.06479891 ÷ 6350.29318 st = 0.00001020408163 st.
Let w(gr) be the numeric value of the same mass measured in Grain (gr), and w(st) the value in Stone (st). Then:
w(st) = w(gr) × (0.06479891 / 6350.29318)
Equivalently, divide by how many gr fit into one st (grams per st divided by grams per gr):
w(st) = w(gr) ÷ 98000
Or: stone = grain ÷ 98000
Examples
Example #1: Convert 20 gr to stone
20 gr = 20 gr × (0.06479891/6350.29318) st = 0.0002040816 st
20 gr = 20 gr ÷ 98000 = 0.0002040816 st
Example #2: Convert 50 gr to stone
50 gr = 50 gr × (0.06479891/6350.29318) st = 0.0005102041 st
50 gr = 50 gr ÷ 98000 = 0.0005102041 st
Summary
To convert Grain to Stone, multiply the value in gr by the ratio of grams per gr divided by grams per st. Equivalently: value_st = value_gr × (0.06479891 / 6350.29318). Numerically, 1 gr equals 0.000010204081632653061 st.
Relationship context
Both units belong to imperial / UK (stone, long ton, pound, ounce). Relationships such as 16 oz per lb and 14 lb per stone are exact in the avoirdupois system; tons use fixed pound counts. This tool uses international definitions tied to the kilogram.
Conversion tables
| Grain (gr) | Stone (st) |
|---|---|
| 0.1 | 0.0000010204 |
| 1 | 0.0000102041 |
| 2 | 0.0000204082 |
| 3 | 0.0000306122 |
| 4 | 0.0000408163 |
| 5 | 0.0000510204 |
| 6 | 0.0000612245 |
| 7 | 0.0000714286 |
| 8 | 0.0000816327 |
| 9 | 0.0000918367 |
| Grain (gr) | Stone (st) |
|---|---|
| 10 | 0.0001020408 |
| 20 | 0.0002040816 |
| 30 | 0.0003061224 |
| 40 | 0.0004081633 |
| 50 | 0.0005102041 |
| 60 | 0.0006122449 |
| 70 | 0.0007142857 |
| 80 | 0.0008163265 |
| 90 | 0.0009183673 |
| 100 | 0.0010204082 |