A curated collection of the best free construction calculators for contractors, builders, and DIYers.
| Calculator | Use Case | Link |
|---|---|---|
| Concrete Calculator | Cubic yards for slabs, footings, walls | Use Free → |
| Drywall Calculator | Sheets, compound, tape, screws | Use Free → |
| Paint Calculator | Gallons with door/window cutouts | Use Free → |
| Gravel Calculator | Tons for driveways, drainage, fill | Use Free → |
| Mulch Calculator | Cubic yards for landscaping beds | Use Free → |
| Board Foot Calculator | Lumber pricing and ordering | Use Free → |
| Brick Calculator | Bricks and mortar for walls | Use Free → |
| Rebar Calculator | Rebar quantity and spacing | Use Free → |
| Calculator | Use Case | Link |
|---|---|---|
| Roofing Calculator | Shingles, underlayment, flashing | Use Free → |
| Deck Calculator | Boards, posts, footings, screws | Use Free → |
| Fence Calculator | Posts, rails, pickets, concrete | Use Free → |
| Siding Calculator | Squares and trim | Use Free → |
| Stair Calculator | Rise, run, stringer layout | Use Free → |
| Paver Calculator | Pavers, sand base, edge restraint | Use Free → |
| Calculator | Use Case | Link |
|---|---|---|
| Wire Size Calculator | AWG by amperage and distance | Use Free → |
| BTU Calculator | Heating/cooling load | Use Free → |
| CFM Calculator | Airflow requirements | Use Free → |
| Amp Calculator | Amperage from watts/volts | Use Free → |
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