Distance divided by time.
Foot per Hours to Nautical mile per Seconds Converter — ft/h to nmi/s
Convert Foot per Hours (ft/h) to Nautical mile per Seconds (nmi/s) using the exact conversion factor (1 foot per hours = 4.571634e-8 nautical mile per seconds). See the formula, worked examples, and conversion table.
Foot per Hours to Nautical mile per Seconds converter
Converter
Speed Converter
Convert road, aviation, marine, lab, and scientific speed units.
Context values
Some unit families need one extra value for a physically accurate result.
Distance divided by time.
Result = input x 8.46666667e-5 / 1852.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot per Hours to Nautical mile per Seconds
Foot per Hours and Nautical mile per Seconds both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). Both are distance divided by time units.
Formula
nautical mile per seconds = foot per hours × 4.571634e-8
This factor comes from each unit's defined relationship to the category's base unit: 1 foot per hours equals 0.0000846666666667 base units, and 1 nautical mile per seconds equals 1852 base units, so dividing one by the other gives the direct foot per hours-to-nautical mile per seconds factor of 4.571634e-8.
Simple example
1 ft/h × 4.571634e-8 = 4.571634e-8 nmi/s
1 foot per hours = 4.571634e-8 nautical mile per seconds.
Real-world example
10 ft/h × 4.571634e-8 = 4.571634e-7 nmi/s
10 foot per hours = 4.571634e-7 nautical mile per seconds.
Conversion table
| Foot per Hours (ft/h) | Nautical mile per Seconds (nmi/s) |
|---|---|
| 1 ft/h | 4.571634e-8 nmi/s |
| 5 ft/h | 2.285817e-7 nmi/s |
| 10 ft/h | 4.571634e-7 nmi/s |
| 25 ft/h | 0.0000011429 nmi/s |
| 50 ft/h | 0.0000022858 nmi/s |
| 100 ft/h | 0.0000045716 nmi/s |
Reverse conversion: Nautical mile per Seconds to Foot per Hours
4.571634e-8 nmi/s × 21874015.75 = 0.9999999411 ft/h
4.571634e-8 nautical mile per seconds = 0.9999999411 foot per hours.
foot per hours = nautical mile per seconds × 21874015.748
For a page dedicated to this direction, see Nautical mile per Seconds to Foot per Hours.
Understanding the Foot per Hours (ft/h)
Distance divided by time.
Understanding the Nautical mile per Seconds (nmi/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nautical mile per seconds are in 1 foot per hours?
1 foot per hours equals 4.571634e-8 nautical mile per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert foot per hours to nautical mile per seconds?
Multiply the foot per hours value by 4.571634e-8. The converter above does this instantly to whatever precision you set.
How do I convert nautical mile per seconds back to foot per hours?
Use the reverse factor: 1 nautical mile per seconds equals 21,874,015.75 foot per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot per hours?
Foot per Hours (ft/h) is a unit of speed.
What is a nautical mile per seconds?
Nautical mile per Seconds (nmi/s) is a unit of speed.
Is the foot per hours to nautical mile per seconds conversion exact?
Yes. Both foot per hours and nautical mile per seconds are defined by fixed standards rather than physical artifacts, so the factor of 4.571634e-8 used above is exact to as many digits as you choose to display.