Distance divided by time.
Foot per Days to Kilometer per Seconds Converter — ft/d to km/s
Convert Foot per Days (ft/d) to Kilometer per Seconds (km/s) using the exact conversion factor (1 foot per days = 3.527778e-9 kilometer per seconds). See the formula, worked examples, and conversion table.
Foot per Days to Kilometer 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 / 1000.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot per Days to Kilometer per Seconds
Foot per Days and Kilometer 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
kilometer per seconds = foot per days × 3.527778e-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 kilometer per seconds equals 1000 base units, so dividing one by the other gives the direct foot per days-to-kilometer per seconds factor of 3.527778e-9.
Simple example
1 ft/d × 3.527778e-9 = 3.527778e-9 km/s
1 foot per days = 3.527778e-9 kilometer per seconds.
Real-world example
10 ft/d × 3.527778e-9 = 3.527778e-8 km/s
10 foot per days = 3.527778e-8 kilometer per seconds.
Conversion table
| Foot per Days (ft/d) | Kilometer per Seconds (km/s) |
|---|---|
| 1 ft/d | 3.527778e-9 km/s |
| 5 ft/d | 1.763889e-8 km/s |
| 10 ft/d | 3.527778e-8 km/s |
| 25 ft/d | 8.819444e-8 km/s |
| 50 ft/d | 1.763889e-7 km/s |
| 100 ft/d | 3.527778e-7 km/s |
Reverse conversion: Kilometer per Seconds to Foot per Days
3.527778e-9 km/s × 283464566.9 = 1.000000063 ft/d
3.527778e-9 kilometer per seconds = 1.000000063 foot per days.
foot per days = kilometer per seconds × 283464566.929
For a page dedicated to this direction, see Kilometer per Seconds to Foot per Days.
Understanding the Foot per Days (ft/d)
Distance divided by time.
Understanding the Kilometer per Seconds (km/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilometer per seconds are in 1 foot per days?
1 foot per days equals 3.527778e-9 kilometer per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert foot per days to kilometer per seconds?
Multiply the foot per days value by 3.527778e-9. The converter above does this instantly to whatever precision you set.
How do I convert kilometer per seconds back to foot per days?
Use the reverse factor: 1 kilometer per seconds equals 283,464,566.9 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 kilometer per seconds?
Kilometer per Seconds (km/s) is a unit of speed.
Is the foot per days to kilometer per seconds conversion exact?
Yes. Both foot per days and kilometer per seconds are defined by fixed standards rather than physical artifacts, so the factor of 3.527778e-9 used above is exact to as many digits as you choose to display.