Project Cost Calculator

Estimate the total cost of a DIY or remodel project. Enter materials, labor, any other costs, and a contingency to get a planning total.

cost breakdownmaterialslaborplus other costs and contingency
Project Total
Materials, labor, extras, and contingency.

Usage Tip

Get at least two or three quotes for both materials and labor. The contingency line is not padding — it is the money that keeps a surprise from stalling the project.

THE MATH
Materials = quantity × unit price
Labor = hours × rate
Total = (materials + labor + other) × (1 + contingency%)
Quantity and unit price cover materials — for example square feet of flooring at a price per square foot. Labor is your hours times an hourly rate, or a contractor quote.
Contingency covers tax, surprises, and small extras.
A 10 to 20% contingency is normal — renovation surprises like rot, old wiring, and code upgrades are common.
For several materials, total them separately and enter the sum, or run the calculator once per material.
This excludes permits and equipment rental unless you add them under other costs, and sales tax varies by location.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.