Construction Calculators

Calculate area and perimeter for rectangles, circles, triangles and trapezoids in sq ft and sq m.

Calculate how much paint you need for a room based on dimensions, doors, windows and coats.

Calculate how many tiles you need for a floor or wall area with waste allowance and box count.

Calculate cement bags, sand and gravel needed for a concrete slab using standard 1:2:3 mix ratio.

Calculate cubic feet from length, width and height. Convert to cubic yards, cubic meters, liters and gallons.

Calculate board feet for lumber. Enter thickness, width, length and quantity to find total board feet and cost.