Convert Long hundredweights per day to Grains per second
Convert Long hundredweights per day (cwt/d) to Grains per second (gr/s) instantly and accurately.
Conversion Formula
gr/s = cwt/d × 9.074074074
About Long hundredweights per day
The long hundredweight per day (cwt/d, UK) equals 50.80234544/86400 ≈ 5.880×10⁻⁴ kg/s, encountered in legacy British industrial reports for colliery output, port-handling capacity, and sugar-refinery throughput. Historical British coal-mine productivity was routinely expressed in long cwt per miner per day. 1 long cwt/d ≈ 5.880×10⁻⁴ kg/s = 112 lb/d.
About Grains per second
The grain per second (gr/s) equals 64.79891 mg/s or 6.479891×10⁻⁵ kg/s. The grain (= 1/7000 lb exactly) is the smallest avoirdupois mass unit, still used in ballistics for bullet and propellant-charge weights. A .308 Winchester rifle bullet of 168 gr fired in 1 s represents 168 gr/s; powder charge is typically 40-46 gr. 1 gr/s = 6.479891×10⁻⁵ kg/s = 64.79891 mg/s.
Quick Reference Table
| Long hundredweights per day (cwt/d) | Grains per second (gr/s) |
|---|---|
| 1 cwt/d | 9.07407 gr/s |
| 2 cwt/d | 18.1481 gr/s |
| 5 cwt/d | 45.3704 gr/s |
| 10 cwt/d | 90.7407 gr/s |
| 25 cwt/d | 226.852 gr/s |
| 50 cwt/d | 453.704 gr/s |
| 100 cwt/d | 907.407 gr/s |