Convert Grains to US tons
1 grain is 7.14e-8 ton. One grain is exactly 7.14285714286e-8 US tons.
One grain is 7.1429 × 10^-8 US tons. To convert grains to US tons, multiply by 7.1429 × 10^-8; to go the other way, divide by 7.1429 × 10^-8 or multiply by 14000000. 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. Exactly 64.79891 milligrams, the unit both the avoirdupois and troy systems are built from.
Factor checked against the defining standard · How we check
- Grains × 7.1429 × 10^-8
1 * 7.1428571e-80 ton
1 grain in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.002285714286 oz | × 0.00228571428571 |
| pounds | 0.0001428571429 lb | × 0.000142857142857 |
| stone | 0.00001020408163 st | × 0.0000102040816327 |
| US tons | 0.00000007142857143 ton | × 0.0000000714285714286 |
| micrograms | 64,798.91 mcg | × 64,798.91 |
| milligrams | 64.79891 mg | × 64.79891 |
| centigrams | 6.479891 cg | × 6.479891 |
| grams | 0.06479891 g | × 0.06479891 |
| kilograms | 0.00006479891 kg | × 0.00006479891 |
| slugs | 0.000004440135739 slug | × 0.0000044401357388 |
| tonnes | 0.00000006479891 t | × 0.00000006479891 |
| carats | 0.32399455 ct | × 0.32399455 |
| troy ounces | 0.002083333333 ozt | × 0.00208333333333 |
| grains (as entered) | 1 gr | — |
| long tons | 0.0000000637755102 LT | × 0.0000000637755102041 |
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 grains to US tons? The converter and the working
- 1.Take the measurement in grains.
- 2.Multiply by 7.1429 × 10^-8 — that is how many US tons fit in one grain.
- 3.To go back the other way, divide by 7.1429 × 10^-8, or multiply by 14000000.
Worked example: 25 grains to US tons
- Formula
- gr × 7.1429 × 10^-8 = ton
- Arithmetic
- 25 × 7.1429 × 10^-8 = 0.000001786 ton
- Answer
- 25 gr = 0.000001786 ton
The factor is rounded for display; the figure above is computed from the full value.
Grains to US tons conversion table
| Grains | US tons |
|---|---|
| 1 gr | 7.14e-8 ton |
| 2 gr | 1.43e-7 ton |
| 3 gr | 2.14e-7 ton |
| 4 gr | 2.86e-7 ton |
| 5 gr | 3.57e-7 ton |
| 6 gr | 4.29e-7 ton |
| 7 gr | 5.00e-7 ton |
| 8 gr | 5.71e-7 ton |
| 9 gr | 6.43e-7 ton |
| 10 gr | 7.14e-7 ton |
| 12 gr | 8.57e-7 ton |
| 15 gr | 0.000001071 ton |
| 20 gr | 0.000001429 ton |
| 25 gr | 0.000001786 ton |
| 50 gr | 0.000003571 ton |
| 100 gr | 0.000007143 ton |
| 200 gr | 0.00001429 ton |
| 300 gr | 0.00002143 ton |
| 500 gr | 0.00003571 ton |
| 1000 gr | 0.00007143 ton |
| 2000 gr | 0.0001429 ton |
| 5000 gr | 0.0003571 ton |
| 10000 gr | 0.0007143 ton |
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.
What is a US ton?
The short ton: 2,000 pounds. A metric tonne is about 10% heavier and a British long ton about 12%.
How many US tons are in a grain?
One grain is 7.1429 × 10^-8 US tons. Going the other way, one US ton is 14000000 grains. 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 grain.
Cite this page
- APA
- Rule Calculator. (2026). Convert Grains to US tons. Rule Calculator. https://rulecalculators.com/convert/grain-to-ton
- MLA
- "Convert Grains to US tons." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/grain-to-ton.
- Chicago
- Rule Calculator. "Convert Grains to US tons." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/grain-to-ton.
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Questions people actually ask
- How many US tons are in a grain?
- 7.1429 × 10^-8. The short ton: 2,000 pounds. A metric tonne is about 10% heavier and a British long ton about 12%.
- How do I convert US tons back to grains?
- Divide by 7.1429 × 10^-8, or multiply by 14000000 — they are the same operation.
Other weight conversions
US tons to grains — the same conversion the other way.