Spike's Calculators

Area and Perimeter

Scalene Trapezoid

Spike VM

Calculate the area and perimeter of a scalene trapezoid. A scalene trapezoid is a shape where two different length bases run parallel to each, and the connecting legs have different lengths.

This calculator can be used for different types of trapezoids (isosceles, right-angled, obtuse) when you know the length of all four sides.

Scalene = trapezoid with all sides having a different length, and the four angles are unequal.

Scalene Trapezoid

Scalene Trapezoid Area and Perimeter

Base Length a ft in n
Base Length b ft in n
Length Leg c ft in n
Length Leg d ft in n
Decimal Precision


Height of the of the Trapezoid ft
Area of the Trapezoid
Decimal Square Feet ft²
Square Feet ft² in²
Decimal Square Inches in²
Square Inches in²
Square Metres
Perimeter of the Trapezoid
Decimal Feet ft
Feet ft in
Decimal Inches in
Inches in
Metres m


  1. enter the length of base a in feet and or inches
  2. length of base b in feet and or inches
  3. the length of leg c in feet and or inches
  4. length of leg d in feet and or inches
  5. the height of the trapezoid in feet and or inches
  6. decimal precision, the number of digits after the decimal point


  1. the height of the trapezoid in decimal feet
  2. the area of the scalene trapezoid 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 scalene trapezoid 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
0.5hy= √(s(s-c)(s-d)(s-y))
A = (a+b)/2*h
P = a+b+c+d
where h is the height of the trapezoid
y the length of the base = b  a
s = 0.5(c+ d + y)
a is the short base length
b the long base length
c the length of a leg
d the length of the other leg
A is the area
P the perimeter of the trapezoid

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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