Enter a value to any field - the others are calculated themselves. If you change a value in any field, the others are automatically recalculated.
For decimals you can enter either points or commas
as decimal marks (but only one decimal point in a value).

a = m
u = m
O = m
P = m²
to 6 digits

The result will be in the units that you enter into the fields.
For example: if you enter decimeters, calculation will be also in decimeters.

If appears an error NaN, check whether you enter to the field
a correct value, ie. without any letters and other characters.


O = 4 × a [m]
P = a × a = a² [m²]
u = a √2 ≈ a × 1,41 [m]
Square formula

a … length of one side

u … diagonal

The square and the circle (disc)

Diagonal (u) = Excircle diameter
Side of square (a) = Incircle diameter

Calculation of square online

Square calculator


How to calculate ...

Bold shapes and objects are already in operation. The others contain only a formula.

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