Spike's Calculators

Area and Perimeter

Isosceles Triangle

Spike VM

Calculate the area and perimeter of an isosceles triangle. This calculator uses feet for measurements.

Isosceles Triangle = a triangle that has two equal length sides.

Isosceles Triangle

Isosceles Triangle Area and Perimeter

Length of Base ft in n
Height ft in n
Decimal Precision


Length of the Diagonal ft
Area of the Isosceles Triangle
Decimal Square Feet ft²
Square Feet ft² in²
Decimal Square Inches in²
Square Inches in²
Square Metres
Perimeter of the Isosceles Triangle
Decimal Feet ft
Feet ft in
Decimal Inches in
Inches in
Metres m


  1. base length in feet and or inches
  2. height in feet and or inches
  3. decimal precision, the number of digits after the decimal point


  1. length of diagonal in decimal feett
  2. the area of the isosceles triangle in decimal square feet
  3. area in square feet and inches
  4. the area in decimal square inches
  5. the area in square inches
  6. the area in square metres
  7. the perimeter of the isosceles triangle in decimal feet
  8. the perimeter in lineal feet and inches
  9. the perimeter in decimal inches
  10. the perimeter in inches
  11. the perimeter in metres

A = bh/2
P =a*2+b
where A is the area of the ellipse
b the length of the base
h the height
P the perimeter of the triangle
a the length of a leg

one square foot ( ft²) = 144 square inches (in²)
one square inch (in²) = 0.00694444444444443 square feet (ft²)
one square foot ( ft²) = 0.09290304 square metres (m²)
square inch (in²) = 0.00064516 square metres (m²)
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