Ramefor

Free calculation and scope model

Bathroom remodel cost calculator

Model real room geometry, demolition, wet-area work, fixtures, ventilation, and concealed-condition uncertainty without turning unpriced work into $0.

No signupVisible formulasOverlap-aware scope
Bathroom Scope Model

Build the project without hiding gaps

5 sections

1 Room

Room area drives geometry, the overlap-safe demolition formula, size-band matching, and HVI planning—not a whole-bath $/sq-ft estimate.

2 Demolition

Whole-bath demolition is added only when the wet-area pathway makes tear-out overlap safe.

3 Wet area

Choose one base pathway. Complete assembly, user quote, and tile component paths never stack.

4 Fixtures

Installed, user-quote, and product-only pathways have different compatibility rules.

5 Ventilation / condition

Fan pricing, HVI performance planning, EPA exhaust guidance, and concealed-condition planning stay separate.

Optional. Used only for the HVI planning comparison.

Fixture counts apply only to rooms over 100 sq ft; smaller rooms use the HVI area-based planning screen.

The result may be a partial modeled subtotal. Benchmarks, unresolved work, and ventilation guidance never enter it.

Transparent component model

How this calculator works

Room dimensions create a project inventory. One mutually exclusive wet-area pathway, compatible fixture paths, and overlap-safe demolition may enter the modeled subtotal through the shared Scope Graph.

This Old House size bands remain independent benchmarks. Unresolved plumbing, flooring, electrical, waterproofing, concealed repair, and ventilation-route work stays visible but unpriced, with an Evidence Ledger for every monetary line.

Review the broader bathroom remodel cost guide

Define the scope before comparing quotes

Confirm demolition boundaries, wet-area inclusions, plumbing locations, concealed-condition change orders, and the exterior exhaust route before comparing totals. The model withholds overlapping or unsupported costs instead of inventing surcharges.

Plan the scope of a small bathroom remodel