How to Use This Calculator
- Enter the total project area in square feet.
- Replace the example material and labor rates with your own assumptions.
- Set contractor and contingency percentages, then select Calculate Cost.
Calculation Formula
Worked Example
For 2,000 sq ft at $85 for materials and $55 for labor, direct cost is $280,000. A 12% contractor fee is $33,600. A 10% contingency on the subtotal is $31,360, producing an estimated total of $344,960.
Factors That Affect the Estimate
- Project location and accessibility
- Building type and design complexity
- Site preparation and utility work
- Finish selections and material availability
- Permit, tax, insurance, and financing costs
Frequently Asked Questions
Is this calculator based on current local prices?
No. Default amounts are editable examples. Enter rates from your own research or project quotes.
Does the total include permits and taxes?
Not automatically. Add those items to your assumptions or contingency if they apply.
What area should I enter?
Use the total floor area covered by the rates you enter, measured in square feet.
Why is contingency calculated after the contractor fee?
This model applies contingency to the working subtotal so the reserve covers both direct cost and contractor fee uncertainty.
Can I print the estimate?
Yes. Calculate the result and use the Print Results button.
Important Disclaimer
This calculator provides a planning estimate only. It is not a bid, appraisal, or professional construction advice. Confirm quantities, code requirements, labor, permits, taxes, site conditions, and current local prices with qualified professionals before making financial decisions.