Convert Furlong per Fortnight to Miles per Second
Convert Furlong per Fortnight (fur/fn) to Miles per Second (mi/s) instantly and accurately.
Conversion Formula
mi/s = fur/fn × 1.033399471e-7
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.
About Miles per Second
A mile per second (mi/s) = exactly 1,609.344 m/s - above the fastest air-breathing aircraft. NASA X-43A scramjet: 2.9 km/s ≈ 1.8 mi/s (Mach 9.6). Earth's orbital speed around the Sun: ~18.5 mi/s (29.8 km/s). Light travels ~186,282 mi/s in vacuum - the classic imperial figure still used in popular astronomy. Tunguska impactor entered Earth's atmosphere at ~9-11 mi/s. 1 mi/s = 3,600 mph = 3,128.3 kn.
Quick Reference Table
| Furlong per Fortnight (fur/fn) | Miles per Second (mi/s) |
|---|---|
| 1 fur/fn | 1.033 × 10-7 mi/s |
| 2 fur/fn | 2.067 × 10-7 mi/s |
| 5 fur/fn | 5.167 × 10-7 mi/s |
| 10 fur/fn | 1.033 × 10-6 mi/s |
| 25 fur/fn | 2.583 × 10-6 mi/s |
| 50 fur/fn | 5.167 × 10-6 mi/s |
| 100 fur/fn | 1.033 × 10-5 mi/s |