Convert Grains to Long Tons
Convert Grains (gr) to Long Tons (L/T) instantly and accurately.
Conversion Formula
L/T = gr × 6.377551020e-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 Long Tons
A long ton (UK ton, displacement ton) equals 2,240 pounds or exactly 1,016.0469088 kg. The standard ton in the United Kingdom and Commonwealth countries, it equals 20 long hundredweights of 112 lb each. Naval architecture and ship displacement are specified in long tons: the displacement of a warship or cargo vessel is the weight of water it displaces, expressed in long tons. The Titanic had a displacement of approximately 52,310 long tons. British agricultural, mining, and coal trade statistics from the 18th through mid-20th centuries used long tons exclusively.
Quick Reference Table
| Grains (gr) | Long Tons (L/T) |
|---|---|
| 1 gr | 6.378 × 10-8 L/T |
| 2 gr | 1.276 × 10-7 L/T |
| 5 gr | 3.189 × 10-7 L/T |
| 10 gr | 6.378 × 10-7 L/T |
| 25 gr | 1.594 × 10-6 L/T |
| 50 gr | 3.189 × 10-6 L/T |
| 100 gr | 6.378 × 10-6 L/T |