18 free calculators & tools — no sign-up required
Estimate materials.
Plan your project.
Precise calculators for concrete, roofing, paint, tile, and more. Save your dimensions, compare materials side-by-side, and generate a complete project plan.
18
Calculators & Tools
2
Unit Systems
0
Cookies Used
100%
Free Forever
Concrete
Volume, bags, and weight for any pour
Roofing
Pitch-corrected material estimates
Paint & Tile
Interior finishing estimates
Why trust our calculators
Open formulas
Every calculation shows its formula, a worked example, and common mistakes. Verify the math before ordering.
Imperial & metric
Switch between feet/inches and meters/centimeters on any calculator. Results update instantly.
Save your dimensions
Enter project dimensions once and reuse them across every calculator. No re-typing. Stored locally.
Frequently asked questions
Are these calculators free to use?
Yes. Every calculator on HomeProjectHub is completely free. No sign-up, no paywall, no data collection. Your dimensions are stored locally in your browser and never sent to a server.
How accurate are the calculations?
All formulas use standard engineering math: geometric volume calculations, pitch-corrected surface area, and manufacturer-published bag yields. Every calculator shows its formula and a worked example so you can verify the math yourself.
Can I save my project dimensions?
Yes. Use the Save Measurement feature on any calculator to store your dimensions in-browser via localStorage. Visit the Saved Rooms page to manage and reload them into any calculator instantly.
Do you support metric units?
Every concrete calculator supports both imperial (feet, inches, cubic yards) and metric (meters, centimeters, cubic meters) with a one-click toggle. Results update instantly.