Construction & DIY calculators
Estimate materials, verify nominal lumber, size openings, and model rises and runs, with inches as the job-site default.
Popular build calculators
High-impact tools for installs and takeoffs.
Tile Calculator
Tile counts from inch-based room dimensions and grout lines.
Flooring Calculator
Area, waste, and packages for floors in feet/inches workflows.
Lumber Size Calculator
Nominal vs actual dimensions for studs and boards.
Drywall Calculator
Sheet counts from room perimeters and heights.
Floors, walls & ceilings
Framing, openings & systems
Lumber Size Calculator
Convert nominal vs actual lumber dimensions in inches
Door Size Guide
Standard door sizes and clearances in inches
Window Size Calculator
Calculate window rough opening size in inches
Pipe Size Calculator
Calculate pipe diameter, circumference, and area
Roof Pitch Calculator
Calculate roof pitch from rise and run in inches
Stair Rise & Run Calculator
Calculate stair dimensions from height in inches
Quick reference: nominal lumber (softwood)
Common boards: actual thickness × width
| Nominal | Actual (in) |
|---|---|
| 2×4 | 1½ × 3½ |
| 2×6 | 1½ × 5½ |
| 2×8 | 1½ × 7¼ |
Always verify with a tape; moisture and milling vary.
Stairs & pitch
Rise and run are often tracked in inches per step; roof pitch pairs rise and run over the same span. Use the dedicated calculators for code limits in your area.
Explore more categories
Area and volume for takeoffs; length for layout; cooking for kitchen installs.