Convert 1 Kilometer to Millimeter

1 km (kilometer) is equal to 1,000,000 mm (millimeter). To convert from kilometer to millimeter, multiply by 1,000,000 or divide by 0.000001.

• 1 km × 1000000 = 1000000 mm
• 1 km ÷ 1.0E-6 = 1000000 mm