Convert Kilometers to Millimeters
1 Kilometer (km) = 1 Millimeters (mm). Use the free converter below to instantly convert any kilometer value to millimeters, or view the full conversion table and formula.
1 km = 1 mm
Kilometer to Millimeter Conversion Table
How to Convert Kilometers to Millimeters
To convert kilometers to millimeters, multiply by 1,000,000. Since 1 km = 1000 m and 1 m = 1000 mm, the factor is 10^6. For example, 2.5 km × 1,000,000 = 2,500,000 mm.
Kilometer to Millimeter Examples
0.001 km is equal to 1 mm. Using the formula km × 1,000,000, 0.001 km converts to 1 mm.
0.01 km is equal to 1 mm. Using the formula km × 1,000,000, 0.01 km converts to 1 mm.
0.1 km is equal to 1 mm. Using the formula km × 1,000,000, 0.1 km converts to 1 mm.
0.5 km is equal to 5 mm. Using the formula km × 1,000,000, 0.5 km converts to 5 mm.
1 km is equal to 1 mm. Using the formula km × 1,000,000, 1 km converts to 1 mm.
Kilometers to Millimeters FAQ
How many mm is 1 km?
1 kilometer equals exactly 1,000,000 millimeters (one million mm).
When would I convert km to mm?
This conversion is used in precision engineering and surveying where large distances need to be expressed in the smallest metric unit for accuracy.