Convert Grains to Metric Tons
Convert Grains (gr) to Metric Tons (t) instantly and accurately.
Conversion Formula
t = gr × 6.479891000e-8
About Grains
A grain (gr) is the smallest unit in both the avoirdupois and troy weight systems, equal to exactly 64.79891 milligrams. Originally defined as the mass of a single grain of barley or wheat from the middle of an ear, it has been a standard of weight since ancient times. Today, grains are used to weigh gunpowder charges and bullets (a standard .308 rifle bullet weighs 168 gr), pharmaceutical preparations in apothecary compounding, and the fineness of gold alloys. Arrowhead and fishing hook weights are also specified in grains.
About Metric Tons
A metric ton (t), also called a tonne, equals exactly 1,000 kilograms. It is the standard large mass unit in the international SI system, used worldwide for shipping, trade, agriculture, industry, and environmental monitoring. Global steel production, grain harvests, CO₂ emissions, shipping freight, and oil production are all reported in millions of metric tonnes. A standard TEU shipping container can carry up to approximately 28 metric tonnes of cargo. Carbon footprint calculators express emissions in CO₂ equivalent tonnes (tCO₂e).
Quick Reference Table
| Grains (gr) | Metric Tons (t) |
|---|---|
| 1 gr | 6.48 × 10-8 t |
| 2 gr | 1.296 × 10-7 t |
| 5 gr | 3.24 × 10-7 t |
| 10 gr | 6.48 × 10-7 t |
| 25 gr | 1.62 × 10-6 t |
| 50 gr | 3.24 × 10-6 t |
| 100 gr | 6.48 × 10-6 t |