Site information
About ProjectCalc
A free, browser-based set of material estimation tools for the planning stage of home improvement projects.
What ProjectCalc does
ProjectCalc answers a practical question: how much material do I need to buy? Its calculators take your measurements, apply coverage rates and waste allowances, and convert the theoretical requirement into purchase quantities — whole gallons, boxes, and bags — with an estimated cost when you supply prices.
Who it is for
- Homeowners tackling DIY renovation and repair projects.
- People painting rooms, installing flooring, or pouring small concrete slabs.
- Small contractors who need quick, checkable estimates on site.
How the estimates work
Every calculation runs locally in your browser. Nothing you type is stored, sent, or shared — there is no account, no backend, and no tracking of your inputs. Prices are entirely user-defined: ProjectCalc never invents prices, and cost rows simply do not appear until you enter one.
The limits of estimates
Results are planning estimates, not construction specifications. Real-world coverage varies by product and surface condition; actual waste depends on layout, skill, and site conditions; and structural or safety-critical decisions — foundations, reinforcement, load-bearing design — always require qualified professionals. Every calculator states its formula and assumptions so you can check the math, not just the answer.
The name
ProjectCalc is a working product name and may change.