Convert Pounds per minute to Long tons per day

Convert Pounds per minute (lb/min) to Long tons per day (long ton/d) instantly and accurately.

Pounds per minute (lb/min)
Long tons per day (long ton/d)

Conversion Formula

long ton/d = lb/min × 0.6428571429

About Pounds per minute

The pound per minute (lb/min) equals 0.45359237/60 ≈ 7.560×10⁻³ kg/s, the standard unit for US fire-suppression system design (sprinkler flow demand) and HVAC hydronic loop balancing. A fire-sprinkler head at 15 psi discharges roughly 30-40 lb/min of water; industrial humidifiers are rated in lb/min of steam. 1 lb/min ≈ 7.560×10⁻³ kg/s = 60 lb/h.

About Long tons per day

The long ton per day (long ton/d) equals 1 016.0469088/86400 ≈ 0.011760 kg/s, used in legacy British mining reports for daily colliery output and in Naval fuel-consumption logs. Historic British Admiralty fuel expenditure tables for Royal Navy warships used long ton/d for bunker coal or oil consumption at various speeds. 1 long ton/d ≈ 0.011760 kg/s ≈ 1.016 t/d.

Quick Reference Table

Pounds per minute (lb/min)Long tons per day (long ton/d)
1 lb/min0.642857 long ton/d
2 lb/min1.28571 long ton/d
5 lb/min3.21429 long ton/d
10 lb/min6.42857 long ton/d
25 lb/min16.0714 long ton/d
50 lb/min32.1429 long ton/d
100 lb/min64.2857 long ton/d

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