Slab Designer
Draw the slab, its grades, footings, pipes, anchors and joints, then print draft sheets to take to your building department. Need only a concrete quantity? Use the concrete slab calculator.
Add shape
Layers
Select a shape to edit its size, snap it to others, or weld it into one slab.
Arrows nudge · ⌫ delete · ⌘C / ⌘V copy & paste
Penetration schedule
No pipes or drains placed yet.
Furniture and foot traffic. Wire mesh keeps it flat.
Vapor barrier
6-mil poly under interior / enclosed slabs
Include tool rental in total
Add advisory rental/buy estimates to the grand total
Extra concrete for spillage and uneven subgrade. 10% is typical.
Sheets are drafts. Every number is checked against a starting set of 2021 IRC rules that a licensed reviewer has not validated. Your building department has the final say.