Construction Calculators

Every construction calculator on the site

Start with the Square Foot Calculator to measure your area, then jump to the materials calculator that matches your project.

• Square Foot Calculator

  Get the area of any room, wall, lot or roof in square feet — including circles, triangles and irregular shapes. Start here before pricing materials.

  Best for: measuring areas before estimating materials.

• Concrete Block (CMU) Calculator

  Convert wall area into the exact number of 8x8x16 concrete blocks (CMUs) or cinder blocks, plus mortar bags and core fill — with waste and cost.

  Best for: walls, foundations, retaining walls and masonry projects.

• Paver Calculator

  Turn patio area and paver dimensions into the exact paver count, base sand and joint sand needed — supports rectangular, circular and custom layouts.

  Best for: patios, walkways and driveways using brick or stone pavers.

• Asphalt & Bitumen Calculator

  Estimate asphalt tonnage and binder content from length × width × thickness — with cost per ton — for driveways, parking lots and small roads.

  Best for: asphalt driveways, parking lots and paving jobs.

A typical workflow

1. Measure the area. Use the Square Foot Calculator to get total square footage — it handles rectangles, circles, triangles and irregular shapes.
2. Pick the right materials calculator. Concrete blocks for walls, pavers for patios and walkways, asphalt for driveways and parking lots.
3. Add a waste percentage. 5–10% for simple layouts, 10–15% when there are lots of cuts, curves or openings.
4. Round up and order. Suppliers don't sell fractions of a block, paver or ton — and a few spares on site beat a second delivery.

Other helpful pages

• Browse the full index of free Calculator Friendly tools — finance, health, conversions and date calculators.
• Need a construction calculator we don't have yet? Request one on the help page.