Distance divided by time.
Kilometer per Seconds to Millimeter per Seconds Converter — km/s to mm/s
Convert Kilometer per Seconds (km/s) to Millimeter per Seconds (mm/s) using the exact conversion factor (1 kilometer per seconds = 1,000,000 millimeter per seconds). See the formula, worked examples, and conversion table.
Kilometer per Seconds 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 1000 / 0.001.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilometer per Seconds to Millimeter per Seconds
Kilometer per Seconds 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 = kilometer per seconds × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 kilometer per seconds equals 1000 base units, and 1 millimeter per seconds equals 0.001 base units, so dividing one by the other gives the direct kilometer per seconds-to-millimeter per seconds factor of 1000000.
Simple example
1 km/s × 1000000 = 1,000,000 mm/s
1 kilometer per seconds = 1,000,000 millimeter per seconds.
Real-world example
10 km/s × 1000000 = 10,000,000 mm/s
10 kilometer per seconds = 10,000,000 millimeter per seconds.
Conversion table
| Kilometer per Seconds (km/s) | Millimeter per Seconds (mm/s) |
|---|---|
| 1 km/s | 1,000,000 mm/s |
| 5 km/s | 5,000,000 mm/s |
| 10 km/s | 10,000,000 mm/s |
| 25 km/s | 25,000,000 mm/s |
| 50 km/s | 50,000,000 mm/s |
| 100 km/s | 100,000,000 mm/s |
Reverse conversion: Millimeter per Seconds to Kilometer per Seconds
1 mm/s × 0.000001 = 0.000001 km/s
1 millimeter per seconds = 0.000001 kilometer per seconds.
kilometer per seconds = millimeter per seconds × 0.000001
For a page dedicated to this direction, see Millimeter per Seconds to Kilometer per Seconds.
Understanding the Kilometer per Seconds (km/s)
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 kilometer per seconds?
1 kilometer per seconds equals 1,000,000 millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert kilometer per seconds to millimeter per seconds?
Multiply the kilometer per seconds value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per seconds back to kilometer per seconds?
Use the reverse factor: 1 millimeter per seconds equals 0.000001 kilometer per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilometer per seconds?
Kilometer per Seconds (km/s) is a unit of speed.
What is a millimeter per seconds?
Millimeter per Seconds (mm/s) is a unit of speed.
Is the kilometer per seconds to millimeter per seconds conversion exact?
Yes. Both kilometer per seconds and millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.