Transparent math
See how material width, margins, count, and spacing produce the result.
Practical layout math, made visible
Plan the spacing.
See every mark.
Clear DIY calculators that show the formula, draw the layout, and give you a printable measurement list—before you make the first cut.
Built for the jobsite
Results you can check, not black-box answers
Every finished tool pairs precise calculations with a scaled diagram, explicit assumptions, and mark-by-mark positions.
Useful on mobile
Touch-friendly controls and readable plans work at the wall or workbench.
Ready to print
Take inputs, results, diagrams, assumptions, and position lists to the project.
Calculator library
Thirteen complete tools for accurate project planning
Board-and-batten spacing
Equalize open gaps or centerlines and get every batten position.
Calculate spacing →Gallery-wall layout
Arrange mixed frame sizes and get exact centers and hook positions.
Plan a gallery wall →Fence-picket spacing
Set a maximum gap or picket count and get every picket position.
Calculate spacing →Deck materials
Estimate stock boards, rows, seams, waste, joists, and fasteners.
Estimate materials →Roof pitch
Convert roof measurements into pitch, angle, slope, and rafter length.
Calculate roof pitch →Deck joist size
Compare prescriptive joist sizes and spacing for a required clear span.
Compare joist sizes →Patio paver materials
Estimate pavers, base, sand, edging, slope, excavation, and optional costs.
Estimate patio materials →Stair layout
Calculate equal risers, tread count, total run, angle, and straight-flight geometry.
Calculate stairs →Flooring materials
Turn multi-room measurements into waste-adjusted boxes, pieces, surplus, and cost.
Estimate flooring →Baluster spacing
Calculate railing baluster count, equal gaps, centerline marks, and material length.
Space balusters →Mulch and landscape rock
Combine multiple beds and shapes into bag, bulk-yard, and optional rock-ton estimates.
Estimate landscaping materials →Wainscoting panel layout
Equalize panel openings and get stile marks, rail lengths, molding, and waste.
Lay out wainscoting →Tile layout
Balance edge cuts, compare center starts, draw the grid, and estimate the order.
Plan a tile layout →