Convert ounce to grain
1 oz = 437.5 gr
1 oz = 438 gr
1 oz in every mass unit
| microgram | 28,300,000 μg |
| milligram | 28,300 mg |
| gram | 28.3 g |
| kilogram | 0.0283 kg |
| metric tonne | 0.0000283 t |
| ounce | 1 oz |
| pound | 0.0625 lb |
| stone | 0.00446 st |
| US short ton | 0.0000313 ton |
| grain | 438 gr |
| unified atomic mass unit (dalton) | 1.71e+25 u |
How the conversion works
Multiply by 437.5 to go from ounce to grain, or divide by it to go back. Every conversion on this site routes through the SI value (kg) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? grain to ounce — 1 gr = 0.002285714286 oz.
ounce to grain — common values
| 1 oz | 437.5 gr |
| 2 oz | 875 gr |
| 3 oz | 1,312.5 gr |
| 5 oz | 2,187.5 gr |
| 10 oz | 4,375 gr |
| 15 oz | 6,562.5 gr |
| 20 oz | 8,750 gr |
| 25 oz | 10,937.5 gr |
| 50 oz | 21,875 gr |
| 75 oz | 32,812.5 gr |
| 100 oz | 43,750 gr |
| 250 oz | 109,375 gr |
| 500 oz | 218,750 gr |
| 1000 oz | 437,500 gr |