Convert Feet per Second to Furlong per Fortnight
Convert Feet per Second (ft/s) to Furlong per Fortnight (fur/fn) instantly and accurately.
Conversion Formula
fur/fn = ft/s × 1832.727273
About Feet per Second
A foot per second (ft/s) = exactly 0.3048 m/s - the primary speed unit in US ballistics, hydraulics, and gas dynamics. .308 Winchester muzzle velocity ~2,750 ft/s; 9mm pistol 1,200-1,400 ft/s; .50 BMG 2,910 ft/s. Speed of sound at sea level 1,116 ft/s. River channel mean velocities 0.5-6 ft/s; NFPA sprinkler pipe flows also in ft/s. 1 ft/s = 0.3048 m/s = 1.09728 km/h = 60 ft/min.
About Furlong per Fortnight
A furlong per fortnight (fur/fn) is a deliberately archaic unit equal to exactly 201.168 ÷ 1,209,600 m/s ≈ 1.663 × 10⁻⁴ m/s - just slightly faster than a garden snail at full creep. One furlong (one-eighth of a mile = 201.168 m) and one fortnight (14 days = 1,209,600 s) are both perfectly legitimate historical measures, but their combination is cherished in physics teaching as a cautionary example of needlessly exotic unit choices. Expressing kinetic energy in kg·fur²/fn² or force in kg·fur/fn² illustrates instantly why the SI was universally adopted. The unit appears in satirical physics papers, recreational mathematics columns, and Terry Pratchett's Discworld novels as the native velocity unit of magical phenomena. The speed of light expressed in furlongs per fortnight is approximately 1.803 × 10¹² fur/fn. Snails travel at roughly 0.5-1 fur/fn; strong tidal rip currents reach 100-200 fur/fn. 1 fur/fn ≈ 1.663 × 10⁻⁴ m/s ≈ 0.599 km/h ≈ 0.372 mph.
Quick Reference Table
| Feet per Second (ft/s) | Furlong per Fortnight (fur/fn) |
|---|---|
| 1 ft/s | 1832.73 fur/fn |
| 2 ft/s | 3665.45 fur/fn |
| 5 ft/s | 9163.64 fur/fn |
| 10 ft/s | 18327.3 fur/fn |
| 25 ft/s | 45818.2 fur/fn |
| 50 ft/s | 91636.4 fur/fn |
| 100 ft/s | 183273 fur/fn |