Work out building cost per square foot instantly with clear inputs, formula shown and shareable results.
Cost per square foot is the standard benchmark for comparing building projects because it normalises out size. Converting to cost per square metre multiplies by 10.764, and cost per floor is useful when the site is constrained and the decision is whether to add a storey rather than spread out.
Unit cost
Cost per ft² = total cost / built-up area; per m² = per ft² x 10.764
Cost per ft² = total cost / built-up area; per m² = per ft² x 10.764. Cost per square foot is the standard benchmark for comparing building projects because it normalises out size.
Be explicit and consistent: gross internal, built-up or super built-up areas can differ by 25 percent, which changes the benchmark far more than any real difference in build quality.
This calculator takes 3 inputs: Total construction cost, Built-up area, Number of floors. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.