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Practical guides for planning a project, the method behind every estimate on this site, and a glossary of the terms contractors use when they quote.

In-depth guides

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Quick tips

Budgeting a remodel without surprises

Set a contingency of 10% for cosmetic work and 15–20% for anything that opens a wall. Contingency is not waste: it is the part of the budget you have not discovered yet.

Ordering materials with the right waste factor

Straight runs need 5–8% extra, rooms with many corners need 10%, and diagonal or pattern-matched layouts need 15%. Under-ordering a single dye lot is the most common costly mistake.

Reading a contractor quote

A usable quote separates labor, materials, permits and disposal. If it does not, ask for a breakdown — and confirm whether the price includes tear-out and haul-away.

When to rent equipment instead of hiring

Concrete mixers, plate compactors and insulation blowers are cheap to rent for a day. If the rental plus your time is under half the labor line, do it yourself.

How we estimate

Each calculator turns your measurements into the unit suppliers sell, using standard industry figures: 1.4 tons per cubic yard of crushed stone, 350–400 square feet of wall per gallon of paint, 100 square feet per roofing square, and similar constants.

Prices come from national average material and labor ranges, reviewed each season. We publish a range rather than a single number because the same project varies by region, season and access. Where labor is normally bundled — concrete delivery, roof installation, blown-in insulation — it is included in the range.

No manufacturer or contractor pays to appear in a calculator, and the order of calculators on the site is set by how often people search for them.

Glossary

Square (roofing)
100 square feet of roof surface. Shingles are priced by the square.
Cubic yard
27 cubic feet. Concrete and gravel are sold by volume in this unit.
R-value
A measure of resistance to heat flow. Higher values insulate better.
Waste factor
The extra material added to cover cuts, breakage and errors.
Change order
A written amendment to a signed contract that changes scope or price.
Punch list
The list of small unfinished items the contractor completes before final payment.

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