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Square Kilometre To Square Mile Calculator

Work out square kilometre to square mile instantly with clear inputs, formula shown and shareable results.

About Square Kilometre To Square Mile Calculator

Converting Square kilometres to Square miles is a single multiplication: one km² equals 0.38610216 mi², so the amount is multiplied by that factor. Switching the direction divides by the same factor instead. This factor is an exact definition, not a rounded approximation, so the conversion is precise at any scale.

Formulas

Square kilometres → Square miles

mi² = km² × 0.38610216

Square miles → Square kilometres

km² = mi² ÷ 0.38610216

Worked example

With the default values below, Square Kilometre To Square Mile Calculator returns Converted Value of 0.386102. Change any input above and every figure here is recalculated in your browser.

Inputs used

Amount to convert
1
Directionone of Square kilometres → Square miles, Square miles → Square kilometres
Square kilometres → Square miles

Results

Converted Value
0.386102
Result Unit
mi²
Multiplier Applied
0.38610216
Conversion Used
1 km² = 0.38610216 mi²

Step by step

  1. 1Values used
  2. 2Square kilometres → Square miles
  3. 3Square miles → Square kilometres
  4. 4Converted Value= 0.386102
  5. 5Result Unit= mi²
  6. 6Multiplier Applied= 0.38610216
  7. 7Conversion Used= 1 km² = 0.38610216 mi²

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How many mi² are in one km²?

One km² is 0.38610216 mi². That figure is exact by definition.

How do I convert Square miles back to Square kilometres?

Divide by 0.38610216 instead of multiplying — or just switch the direction selector, which does it for you.

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