kilometre to millimetre Converter

What is a kilometre?

A kilometre is a unit of length equal to 1,000 metres, commonly used to measure long distances.

What is a millimetre?

A millimetre is a small metric unit of length, equal to one thousandth of a metre.

Conversion Formula

To convert from kilometre to millimetre, use the formula:

    millimetre = kilometre × (1000 / 0.001)

Which simplifies to:

    1 kilometre = 1.000000e+6 millimetre

To convert from millimetre to kilometre, use:

    kilometre = millimetre × (0.001 / 1000)

Which simplifies to:

    1 millimetre = 1.000000e-6 kilometre

This formula works by converting kilometre into meters as the base unit, then converting that result into millimetre. It's a two-step, accurate method based on SI units.

\ Example: Convert 10 kilometre to millimetre:
10 × (1000 ÷ 0.001) = 1.000000e+7 millimetre

Common kilometre to millimetre Conversions