Distance divided by time.
Millimeter per Days to Nautical mile per Hours Converter — mm/d to nmi/h
Convert Millimeter per Days (mm/d) to Nautical mile per Hours (nmi/h) using the exact conversion factor (1 millimeter per days = 2.24982e-8 nautical mile per hours). See the formula, worked examples, and conversion table.
Millimeter per Days to Nautical mile per Hours 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 1.15740741e-8 / 0.5144444444.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millimeter per Days to Nautical mile per Hours
Millimeter per Days and Nautical mile per Hours 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 hours = millimeter per days × 2.24982e-8
This factor comes from each unit's defined relationship to the category's base unit: 1 millimeter per days equals 1.157407e-8 base units, and 1 nautical mile per hours equals 0.514444444444 base units, so dividing one by the other gives the direct millimeter per days-to-nautical mile per hours factor of 2.24982e-8.
Simple example
1 mm/d × 2.24982e-8 = 2.24982e-8 nmi/h
1 millimeter per days = 2.24982e-8 nautical mile per hours.
Real-world example
10 mm/d × 2.24982e-8 = 2.24982e-7 nmi/h
10 millimeter per days = 2.24982e-7 nautical mile per hours.
Conversion table
| Millimeter per Days (mm/d) | Nautical mile per Hours (nmi/h) |
|---|---|
| 1 mm/d | 2.24982e-8 nmi/h |
| 5 mm/d | 1.12491e-7 nmi/h |
| 10 mm/d | 2.24982e-7 nmi/h |
| 25 mm/d | 5.62455e-7 nmi/h |
| 50 mm/d | 0.0000011249 nmi/h |
| 100 mm/d | 0.0000022498 nmi/h |
Reverse conversion: Nautical mile per Hours to Millimeter per Days
2.24982e-8 nmi/h × 44448000 = 0.9999999936 mm/d
2.24982e-8 nautical mile per hours = 0.9999999936 millimeter per days.
millimeter per days = nautical mile per hours × 44448000
For a page dedicated to this direction, see Nautical mile per Hours to Millimeter per Days.
Understanding the Millimeter per Days (mm/d)
Distance divided by time.
Understanding the Nautical mile per Hours (nmi/h)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nautical mile per hours are in 1 millimeter per days?
1 millimeter per days equals 2.24982e-8 nautical mile per hours, using the exact defined conversion factor rather than an estimate.
How do I convert millimeter per days to nautical mile per hours?
Multiply the millimeter per days value by 2.24982e-8. The converter above does this instantly to whatever precision you set.
How do I convert nautical mile per hours back to millimeter per days?
Use the reverse factor: 1 nautical mile per hours equals 44,448,000 millimeter per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a millimeter per days?
Millimeter per Days (mm/d) is a unit of speed.
What is a nautical mile per hours?
Nautical mile per Hours (nmi/h) is a unit of speed.
Is the millimeter per days to nautical mile per hours conversion exact?
Yes. Both millimeter per days and nautical mile per hours are defined by fixed standards rather than physical artifacts, so the factor of 2.24982e-8 used above is exact to as many digits as you choose to display.