Distance divided by time.
Foot per Days to Mile per Seconds Converter — ft/d to mi/s
Convert Foot per Days (ft/d) to Mile per Seconds (mi/s) using the exact conversion factor (1 foot per days = 2.192059e-9 mile per seconds). See the formula, worked examples, and conversion table.
Foot per Days to 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 3.52777778e-6 / 1609.344.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot per Days to Mile per Seconds
Foot per Days and 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
mile per seconds = foot per days × 2.192059e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 foot per days equals 0.00000352777777778 base units, and 1 mile per seconds equals 1609.344 base units, so dividing one by the other gives the direct foot per days-to-mile per seconds factor of 2.192059e-9.
Simple example
1 ft/d × 2.192059e-9 = 2.192059e-9 mi/s
1 foot per days = 2.192059e-9 mile per seconds.
Real-world example
10 ft/d × 2.192059e-9 = 2.192059e-8 mi/s
10 foot per days = 2.192059e-8 mile per seconds.
Conversion table
| Foot per Days (ft/d) | Mile per Seconds (mi/s) |
|---|---|
| 1 ft/d | 2.192059e-9 mi/s |
| 5 ft/d | 1.09603e-8 mi/s |
| 10 ft/d | 2.192059e-8 mi/s |
| 25 ft/d | 5.480149e-8 mi/s |
| 50 ft/d | 1.09603e-7 mi/s |
| 100 ft/d | 2.192059e-7 mi/s |
Reverse conversion: Mile per Seconds to Foot per Days
2.192059e-9 mi/s × 456192000 = 0.9999997793 ft/d
2.192059e-9 mile per seconds = 0.9999997793 foot per days.
foot per days = mile per seconds × 456192000
For a page dedicated to this direction, see Mile per Seconds to Foot per Days.
Understanding the Foot per Days (ft/d)
Distance divided by time.
Understanding the Mile per Seconds (mi/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many mile per seconds are in 1 foot per days?
1 foot per days equals 2.192059e-9 mile per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert foot per days to mile per seconds?
Multiply the foot per days value by 2.192059e-9. The converter above does this instantly to whatever precision you set.
How do I convert mile per seconds back to foot per days?
Use the reverse factor: 1 mile per seconds equals 456,192,000 foot per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot per days?
Foot per Days (ft/d) is a unit of speed.
What is a mile per seconds?
Mile per Seconds (mi/s) is a unit of speed.
Is the foot per days to mile per seconds conversion exact?
Yes. Both foot per days and mile per seconds are defined by fixed standards rather than physical artifacts, so the factor of 2.192059e-9 used above is exact to as many digits as you choose to display.