Convert Grams to Grains
1 gram is 15.43 gr. One gram is exactly 15.4323583529 grains.
One gram is 15.432358 grains. To convert grams to grains, multiply by 15.432358; to go the other way, divide by 15.432358 or multiply by 0.06479891. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. One thousandth of a kilogram, and the unit nutrition labels use worldwide.
Factor checked against the defining standard · How we check
- Grams × 15.432358
1 * 15.43235815.432 gr
1 gram in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.03527396195 oz | × 0.0352739619496 |
| pounds | 0.002204622622 lb | × 0.00220462262185 |
| stone | 0.0001574730444 st | × 0.000157473044418 |
| US tons | 0.000001102311311 ton | × 0.00000110231131092 |
| micrograms | 1,000,000 mcg | × 1,000,000 |
| milligrams | 1,000 mg | × 1,000 |
| centigrams | 100 cg | × 100 |
| grams (as entered) | 1 g | — |
| kilograms | 0.001 kg | × 0.001 |
| slugs | 0.00006852176586 slug | × 0.0000685217658568 |
| tonnes | 0.000001 t | × 0.000001 |
| carats | 5 ct | × 5 |
| troy ounces | 0.03215074657 ozt | × 0.0321507465686 |
| grains | 15.43235835 gr | × 15.4323583529 |
| long tons | 0.0000009842065276 LT | × 0.000000984206527611 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert grams to grains? The converter and the working
- 1.Take the measurement in grams.
- 2.Multiply by 15.432358 — that is how many grains fit in one gram.
- 3.To go back the other way, divide by 15.432358, or multiply by 0.06479891.
Worked example: 25 grams to grains
- Formula
- g × 15.432358 = gr
- Arithmetic
- 25 × 15.432358 = 385.81 gr
- Answer
- 25 g = 385.81 gr
The factor is rounded for display; the figure above is computed from the full value.
Grams to grains conversion table
| Grams | Grains |
|---|---|
| 1 g | 15.43 gr |
| 2 g | 30.86 gr |
| 3 g | 46.3 gr |
| 4 g | 61.73 gr |
| 5 g | 77.16 gr |
| 6 g | 92.59 gr |
| 7 g | 108.03 gr |
| 8 g | 123.46 gr |
| 9 g | 138.89 gr |
| 10 g | 154.32 gr |
| 12 g | 185.19 gr |
| 15 g | 231.49 gr |
| 20 g | 308.65 gr |
| 25 g | 385.81 gr |
| 50 g | 771.62 gr |
| 100 g | 1,543.24 gr |
| 200 g | 3,086.47 gr |
| 300 g | 4,629.71 gr |
| 500 g | 7,716.18 gr |
| 1000 g | 15,432.36 gr |
| 2000 g | 30,864.72 gr |
| 5000 g | 77,161.79 gr |
| 10000 g | 154,323.58 gr |
What is a gram?
One thousandth of a kilogram, and the unit nutrition labels use worldwide.
What is a grain?
Exactly 64.79891 milligrams, the unit both the avoirdupois and troy systems are built from. Bullet weights and powder charges are still measured in it, and so are some pharmaceutical doses.
How many grains are in a gram?
One gram is 15.432358 grains. Going the other way, one grain is 0.06479891 grams. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a gram.
Cite this page
- APA
- Rule Calculator. (2026). Convert Grams to grains. Rule Calculator. https://rulecalculators.com/convert/gram-to-grain
- MLA
- "Convert Grams to grains." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/gram-to-grain.
- Chicago
- Rule Calculator. "Convert Grams to grains." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/gram-to-grain.
The date is when the figures on this page were last checked against their source, not the day you opened it. Add your own access date if your style needs one.
Questions people actually ask
- How many grains are in a gram?
- 15.432358. Exactly 64.79891 milligrams, the unit both the avoirdupois and troy systems are built from. Bullet weights and powder charges are still measured in it, and so are some pharmaceutical doses.
- How do I convert grains back to grams?
- Divide by 15.432358, or multiply by 0.06479891 — they are the same operation.
Other weight conversions
Grains to grams — the same conversion the other way.