Convert Newtons to Grains
Convert Newtons (N) to Grains (gr) instantly and accurately.
Conversion Formula
gr = N × 1573.662602
About Newtons
The newton (N) is the SI unit of force, but because weight is technically the gravitational force on a mass, newtons are the scientifically correct unit for what most people call 'weight.' At standard gravity (9.80665 m/s²), 1 kg of mass exerts a weight force of approximately 9.81 N. Scales in physics labs and engineering contexts display results in newtons rather than kilograms. The distinction matters in aerospace and high-altitude contexts: an astronaut's mass stays constant at, say, 70 kg, but their weight in newtons changes from ~686 N on Earth's surface to nearly 0 N in free-fall orbit.
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.
Quick Reference Table
| Newtons (N) | Grains (gr) |
|---|---|
| 1 N | 1573.66 gr |
| 2 N | 3147.33 gr |
| 5 N | 7868.31 gr |
| 10 N | 15736.6 gr |
| 25 N | 39341.6 gr |
| 50 N | 78683.1 gr |
| 100 N | 157366 gr |