Plan with confidence.Buy only what you need.
Purchase-ready estimates for building, renovation, and landscaping materials.
Browse calculators by project
Built for real purchases
The result should help at the store—not stop at square feet.
Each calculator shows the assumptions behind the answer, rounds to practical package quantities, and gives you a result you can copy or save as a PDF.
Example estimatePaint · bedroom
- Paintable area
- 624 sq ft
- Two coats
- 3.57 gal
- Full cans to buy
- 4 × 1 gal
Coverage and openings remain editable.
Complete project workflows
One calculation is not the whole order.
Follow a measured path from project scope to product quantities, missing accessories, cost assumptions, and supplier verification.
Plan 01
Plan a roof replacement
Build a roof-material takeoff from measured planes through shingles, system accessories, delivery, disposal, and final supplier verification.
Open the complete workflow →Plan 02Plan a room renovation
Plan paint, flooring, preparation, trim, labor, delivery, contingency, and tax as one reviewable room-renovation budget.
Open the complete workflow →Plan 03Plan deck materials and cost
Turn deck dimensions into a board layout, surface-material order, separate structural checklist, and comparable project budget.
Open the complete workflow →Planning guides
Know what the number means before you buy.
Practical guides for measuring, choosing assumptions, checking packages, and building a budget you can explain.
01→02→03→04→05→
Estimate project cost
Build a clear project cost estimate from measured quantities, material rates, labor, delivery, contingency, and tax.
Roofing squares & bundles
Learn how roof area, pitch, roofing squares, bundle coverage, and waste work together in a shingle estimate.
Material waste allowance
Choose a waste allowance based on cuts, breakage, patterns, package sizes, and project complexity instead of one universal percentage.
Estimating checklist
A repeatable checklist for measuring a project, verifying product coverage, rounding packages, pricing the order, and reviewing the result.
Methodology & assumptions
How BuildWise calculators handle measurements, units, product coverage, waste, package rounding, cost, examples, and limitations.
BW
Simple tools. Clear assumptions.
BuildWise turns basic dimensions into transparent planning estimates. Calculations run in your browser, require no account, and can be checked against the formulas shown on every calculator page.