From the side
Side a
A = a²; P = 4a; d = a√2
Open calculator ↗GEOMETRY, ONE FIGURE AT A TIMESquare.
Square.
Understand every measure.
Four equal sides. Four right angles. Four free tools, clear formulas and a little discovery along the way.
Find your calculator ↗FIGURE 062D / REFERENCE DRAWING
SQUARENOT TO SCALE
THE CALCULATOR DESK
Start with what you know.
4 calculators available
From area
Area A
a = √A
Open calculator ↗From the diagonal
Diagonal d
a = d/√2
Open calculator ↗From perimeter
Perimeter P
a = P/4
Open calculator ↗MEET THE FIGURE
A square, explained.
A square is a quadrilateral with four equal sides and four right angles. These two conditions matter together: equal sides alone describe a rhombus, while right angles alone describe a rectangle.
Understand the properties ↗LOOK A LITTLE CLOSER
More than a formula.
A square is both a rectangle and a rhombus under inclusive definitions.
A diagonal is longer than a side. Square units describe area; a number in cm² must not be interpreted as cm.
Explore three geometry facts ↗These tools use ideal Euclidean geometry. Every input must use the same unit. Numerical results are rounded and do not replace measurement, specialist design or safety checks. See worked examples.