For a calculation or source correction, include the calculator URL, the non-sensitive inputs you used, the result shown, and what appears incorrect. If you refer to a source, include its public URL and observation date.
Which calculator you used.
Which input was confusing.
Whether the formula explanation was clear enough.
Which exclusions or professional warnings should be more visible.
What not to send
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No insurance claim documents.
No urgent repair or safety issues.
Before hiring
Use the calculators as a starting point, then compare local written estimates from qualified professionals.
Ask each contractor to list materials, labor, permit assumptions, removal/disposal, and exclusions.
Compare scope line by line rather than only comparing the total price.
Confirm licensing, insurance, warranty, payment schedule, and local permit responsibilities.
For project pricing decisions, use the calculators as a starting point and compare written local estimates before hiring.
Start with a calculator
Each calculator page explains its inputs, estimate range, formula, exclusions, and professional boundary.