Distance divided by time.
Nautical mile per Days to Millimeter per Seconds Converter — nmi/d to mm/s
Convert Nautical mile per Days (nmi/d) to Millimeter per Seconds (mm/s) using the exact conversion factor (1 nautical mile per days = 21.43518519 millimeter per seconds). See the formula, worked examples, and conversion table.
Nautical mile per Days to Millimeter 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 0.02143518519 / 0.001.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nautical mile per Days to Millimeter per Seconds
Nautical mile per Days and Millimeter 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
millimeter per seconds = nautical mile per days × 21.4351851852
This factor comes from each unit's defined relationship to the category's base unit: 1 nautical mile per days equals 0.0214351851852 base units, and 1 millimeter per seconds equals 0.001 base units, so dividing one by the other gives the direct nautical mile per days-to-millimeter per seconds factor of 21.4351851852.
Simple example
1 nmi/d × 21.43518519 = 21.43518519 mm/s
1 nautical mile per days = 21.43518519 millimeter per seconds.
Real-world example
10 nmi/d × 21.43518519 = 214.3518519 mm/s
10 nautical mile per days = 214.3518519 millimeter per seconds.
Conversion table
| Nautical mile per Days (nmi/d) | Millimeter per Seconds (mm/s) |
|---|---|
| 1 nmi/d | 21.43518519 mm/s |
| 5 nmi/d | 107.1759259 mm/s |
| 10 nmi/d | 214.3518519 mm/s |
| 25 nmi/d | 535.8796296 mm/s |
| 50 nmi/d | 1,071.759259 mm/s |
| 100 nmi/d | 2,143.518519 mm/s |
Reverse conversion: Millimeter per Seconds to Nautical mile per Days
21.43518519 mm/s × 0.04665226782 = 1 nmi/d
21.43518519 millimeter per seconds = 1 nautical mile per days.
nautical mile per days = millimeter per seconds × 0.0466522678186
For a page dedicated to this direction, see Millimeter per Seconds to Nautical mile per Days.
Understanding the Nautical mile per Days (nmi/d)
Distance divided by time.
Understanding the Millimeter per Seconds (mm/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millimeter per seconds are in 1 nautical mile per days?
1 nautical mile per days equals 21.43518519 millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert nautical mile per days to millimeter per seconds?
Multiply the nautical mile per days value by 21.43518519. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per seconds back to nautical mile per days?
Use the reverse factor: 1 millimeter per seconds equals 0.0466522678 nautical mile per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a nautical mile per days?
Nautical mile per Days (nmi/d) is a unit of speed.
What is a millimeter per seconds?
Millimeter per Seconds (mm/s) is a unit of speed.
Is the nautical mile per days to millimeter per seconds conversion exact?
Yes. Both nautical mile per days and millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 21.43518519 used above is exact to as many digits as you choose to display.