Construction cost
Use a floor area and a rate you enter to calculate a straightforward estimate.
Your result will appear here as you enter measurements.
This is only a simple estimate based on the rate you entered. Actual construction costs vary by location, specification, scope and project conditions.
Save or share this estimate
Saved estimates stay in this browser only; they are not sent to a server or an account. A shared link includes your entered inputs in the web address.
Saved estimates
Backups include all saved area, cost and roof estimates, with full inputs, results, project names and save dates, but not saved comparisons. Keep the downloaded JSON file somewhere safe; it is not encrypted. Imports add to this browser’s collection, never replace it.
No saved estimates for this calculator yet.
Compare scenarios
Add the inputs above, then edit each scenario independently. Rates are always per m², including when area is in ft². Different currencies are not converted. Save the whole comparison below to reopen it later; saving or sharing above applies only to the main estimate.
Enter a positive area and rate and a 3-letter currency code above to add a scenario.
No scenarios yet. Add two or more to compare estimates side by side.
Save this comparison
Add at least one scenario and make every scenario valid before saving.
Saved comparisons keep every scenario’s area, unit, rate and currency in this browser only, without an account or server copy. They do not sync across devices and may be lost if browser data is cleared or private browsing ends. Single-estimate share links and downloaded estimate backups do not include comparisons.
Saved comparisons
Reopening replaces the scenarios currently on this page, but leaves the main estimate unchanged. Save any comparison you want to keep first.
No saved comparisons in this browser yet.