This converter turns stones into grains instantly, using the exact factor 1 stone = 98000 grains. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Fourteen pounds — still the customary way to state body weight in the UK and Ireland. The oldest English mass unit, now used for bullets, arrows and propellant charges.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
stones- The amount you are converting, measured in stones
98000- The exact number of grains in one stone
grains- The converted result
How it works, step by step
- Enter the number of stones you want to convert.
- The value is multiplied by 98000, the exact conversion factor.
- The result is displayed in grains, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 stones
Multiply 5 by 98000. That gives 490,000 grains. A quick sanity check: one stone is larger than one grain, so the number should get bigger — and it does.
Converting 72 stones
72 × 98000 = 7,056,000 grains. Working backwards, 7,056,000 ÷ 98000 returns 72 stones, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many grains are in one stone?
Exactly 98000. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert stones to grains?
Grains = stones × 98000. To reverse it, divide instead: stones = grains ÷ 98000, which is the same as multiplying by 1.020408163e-05.
Is the stone bigger than the grain?
Yes. One stone equals 98000 grains, so it is the larger unit.
Why does my answer differ slightly from other stones to grains converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a stone?
Fourteen pounds — still the customary way to state body weight in the UK and Ireland.
What is a grain?
The oldest English mass unit, now used for bullets, arrows and propellant charges.
Stones to grains reference table
| Stones | Grains |
|---|---|
| 0.5 st | 49,000 gr |
| 1 st | 98,000 gr |
| 2 st | 196,000 gr |
| 3 st | 294,000 gr |
| 5 st | 490,000 gr |
| 10 st | 980,000 gr |
| 15 st | 1,470,000 gr |
| 20 st | 1,960,000 gr |
| 25 st | 2,450,000 gr |
| 50 st | 4,900,000 gr |
| 75 st | 7,350,000 gr |
| 100 st | 9,800,000 gr |
| 250 st | 24,500,000 gr |
| 500 st | 49,000,000 gr |
| 1000 st | 98,000,000 gr |
Exact factor: 1 stone = 98000 grains. Values rounded for display.