2026 Bathroom Remodel Estimator
Bathtub to Shower Conversion Cost Calculator
Accurately calculate the true cost of converting your old bathtub into a modern walk-in shower. Estimates acrylic surrounds, custom tile, 2″ drain plumbing rough-in, and glass enclosures.
Popular Conversion Presets (Click to Load)
Estimated Conversion Cost
$5,845
Typical Range: $5,140 – $6,720
Turnkey Contractor Estimate
Est. Completion Time
3 – 4 Days
Shower Footprint
30″ x 60″ Tub
Wall Surround & Waterproofing Ceramic / Porcelain Tile
$1,450
Shower Pan & Drain Receptor Low-Threshold Acrylic Base
$480
Plumbing Rough-In & Valves 1.5″ to 2″ Code Drain & Valve
$830
Glass Door / Enclosure Semi-Frameless Sliding Glass
$550
Tub Demolition & Haul-Away Enameled Steel Tub Removal
$280
Professional Installation Labor Licensed Remodeling Contractor
$2,015
Built-In Add-ons & Niches Recessed Shower Niche
$240
Total Conversion Estimate
$5,845
Essential Tools for Your Bathroom Renovation
Converting a tub into a walk-in shower impacts your tiles, humidity control, and surrounding fixtures. Coordinate your whole bathroom remodel with our sister calculators:
Shower Tile Calculator →
Calculate square footage, box counts, thinset & grout for custom tiled walls.
Exhaust Fan Installation Cost →
Walk-in showers release high moisture. Size the correct CFM fan to stop mold.
Bathroom Vanity Replacement Cost →
Estimate single or double sink vanities and stone countertops to match your new shower.
Toilet Replacement Cost Calculator →
Plan plumbing labor and fixture costs for a complete bathroom suite refresh.
Bathtub to Shower Conversion: Cost by Material Type
The choice of shower walls and pan dictates nearly 65% of your total project investment. Here is how the most common configurations compare in 2026:
| Shower System | Materials Cost | Labor & Plumbing | Installation Time | Total Turnkey Cost |
|---|---|---|---|---|
| Prefab Acrylic / Fiberglass Kit | $900 – $1,800 | $1,200 – $2,200 | 1 – 2 Days | $2,100 – $4,000 |
| Solid Surface / Composite Slabs | $1,600 – $3,200 | $1,800 – $3,000 | 2 – 3 Days | $3,400 – $6,200 |
| Custom Ceramic / Subway Tile | $1,800 – $3,600 | $2,500 – $4,500 | 3 – 5 Days | $4,300 – $8,100 |
| Curbless Walk-In Tile (ADA) | $2,600 – $5,200 | $3,600 – $6,500 | 4 – 7 Days | $6,200 – $11,700 |
| Luxury Natural Marble & Spa Jets | $4,200 – $9,000 | $4,800 – $8,500 | 5 – 8 Days | $9,000 – $17,500+ |
Crucial Plumbing & Structural Considerations
- The 2-Inch Drain Pipe Mandate: Most building codes require upgrading the old 1.5-inch bathtub drain to a 2-inch shower drain. Shower floors lack the high water-retaining walls of a tub, so a faster drainage rate is required to avoid floor overflows.
- Cast Iron Bathtub Removal: Old cast iron tubs can weigh between 300 and 450 lbs. Rather than risking doorway damage, contractors typically break them with a heavy sledgehammer and haul the pieces out in sections.
- Subfloor Moisture Damage: After removing an old bathtub, contractors frequently find hidden water leaks around the plumbing wall or rotted wood under the tub base. Budget an additional $250 to $500 for subfloor sistering and moisture-resistant backing board.
Frequently Asked Questions
The national average cost for a bathtub to shower conversion ranges from $2,500 to $9,500, with most homeowners spending approximately $4,800 to $6,500 for a turnkey professional installation. A basic prefabricated acrylic or fiberglass kit installation starts around $2,000 to $4,000, while a custom floor-to-ceiling tile walk-in shower with frameless glass doors ranges from $6,500 to $12,000+.
Universal plumbing codes (IPC 417.3 and UPC) require showers to have a minimum 2-inch drain pipe, whereas standard bathtubs use a smaller 1.5-inch drain pipe. A licensed plumber must open the subfloor to replace the 1.5-inch waste line and P-trap with 2-inch pipe to prevent water pooling and standing overflow during high-volume showers.
A prefabricated acrylic or solid-surface wall surround conversion typically takes 1 to 2 days. A custom tiled walk-in shower takes 3 to 6 working days due to concrete backer board installation, multi-coat waterproof membrane curing (such as Schluter Kerdi or RedGard), mortar bed sloping, tile setting, and grout sealing.
Converting a bathtub to a shower increases home appeal and functionality as long as your home maintains at least one operational bathtub in another bathroom for young children and pets. Removing the only bathtub in a home can reduce buyer interest among young families, but converting an awkward master bathroom tub into an expansive walk-in shower yields an average 65% to 70% ROI.
A zero-threshold or barrier-free curbless walk-in shower typically adds $1,000 to $2,500 to standard conversion costs. It requires recessing and reinforcing the subfloor framing or using a pre-sloped structural pan to ensure the shower floor sits completely flush with the bathroom tile while maintaining code-compliant drainage.
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