# Shower Conversion vs Acrylic Walk-In Tubs: A Cost.

> Compare shower conversion and acrylic walk-in tub costs, door seals, dimensions, and installation needs before you buy.

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Last updated: 2026-11-09

A shower conversion replaces a tub with a walk-in shower, while an acrylic walk-in tub keeps a seated bathing footprint with a sealed door. Acrylic tub units cost $1,500–$6,000, and installed standard tubs run $3,000–$10,000. Walk-in shower conversions cost $3,000–$12,000 installed, so the right choice depends on your bathroom dimensions, door seal maintenance, and budget.

## Measure the Space First

Before comparing materials, measure the room. A standard alcove tub fits a 5-foot by 32-inch opening in many US bathrooms. A walk-in shower conversion needs a clear curb-free entry, typically at least 32 inches wide for wheelchair access, and a floor slope of 1/4 inch per foot toward the drain. If your bathroom is 5 feet by 8 feet, a 60-inch tub leaves roughly 36 inches of walking space in front. A shower conversion may reclaim floor space but requires waterproofing the entire enclosure, including walls up to 72 inches high.

Door seals matter on walk-in tubs. A seal failure can leak 1–2 gallons per minute onto the floor. Door seal replacement costs $150–$500, and seals should be checked annually for cracks, compression loss, or mildew buildup. Acrylic tubs rely on a watertight door seal; shower conversions rely on a shower pan and wall membrane instead. Both systems fail if installation details are wrong.

## Acrylic Walk-In Tubs: Costs and Dimensions

Acrylic is a molded plastic reinforced with fiberglass. It is lightweight compared with cast iron, often weighing 100–200 pounds for an empty walk-in tub unit. Once filled with water and a bather, loads add up quickly. A 50-gallon fill weighs about 417 pounds at 8.34 pounds per gallon. Add a 200-pound person and a 150-pound tub, and the floor supports roughly 767 pounds, not including the tub’s internal structure. Over a 3-foot by 5-foot area, that is about 51 pounds per square foot, which most residential bathroom floors can handle, but you should verify joist spacing and subfloor condition before installation.

Acrylic tub units cost $1,500–$6,000. Gelcoat tub units cost $1,000–$3,500. Installed standard tubs cost $3,000–$10,000. The gap between unit price and installed price covers delivery, removal of the old tub, plumbing hookups, surround panels, and finishing. Electrical and permit costs add $300–$1,200 if a new circuit, GFCI protection, or local permit is required.

Acrylic retains heat better than gelcoat and resists chips, but it can scratch if cleaned with abrasive pads. Routine maintenance includes wiping the door seal and checking the latch mechanism. More detail is available in our walk-in tub maintenance guide.

## Walk-In Shower Conversion: Costs and Construction

A walk-in shower conversion removes the tub and installs a shower base, wall panels or tile, a drain, and a glass door or open entry. Costs range from $3,000–$12,000 installed. The wide range reflects whether you choose a one-piece acrylic shower base ($600–$2,000 estimate) or a custom tile pan with waterproof membrane ($1,500–$4,000 estimate). Labor for demolition, plumbing relocation, and tile work drives most of the price.

If the existing drain is in the tub alcove, a conversion may reuse the drain location. Moving a drain can add several hundred dollars in labor and may require opening the ceiling below to access plumbing. Wall height matters: a shower enclosure typically needs waterproofing to 72 inches above the finished floor, while a tub surround only needs protection to the rim height, usually 20–21 inches.

Shower conversions do not have a door seal like a walk-in tub, but they do have a shower door sweep or threshold seal that can wear out. Replacement sweeps cost less than tub door seals, but water containment depends on proper slope and caulk lines at corners.

## Side-by-Side Cost Table

| Item | Acrylic Walk-In Tub | Walk-In Shower Conversion |
|---|---|---|
| Unit or base | $1,500–$6,000 | $3,000–$12,000 installed |
| Gelcoat alternative | $1,000–$3,500 | Not applicable |
| Installed standard | $3,000–$10,000 | Included in conversion range |
| Door seal replacement | $150–$500 | Door sweep varies |
| Electrical and permit | $300–$1,200 | $300–$1,200 if needed |

These figures are estimates. Actual quotes depend on local labor rates, bathroom size, and whether walls or floors need repair. For a broader cost breakdown, see our walk-in tub cost per square foot article.

## Installation and Floor Load

Installation usually takes 1–3 days for a tub replacement and 3–5 days for a shower conversion, assuming no major structural repairs. Both require a level subfloor. A standard bathroom floor joist span of 16 inches on center can typically support a filled acrylic tub, but older homes with 24-inch spacing or rotted subflooring may need reinforcement.

Water weight is the main load concern. A 40-gallon tub holds 333.6 pounds of water. A 60-gallon tub holds 500.4 pounds. Add a 250-pound bather and a 175-pound tub, and a 60-gallon unit creates a concentrated load of about 925 pounds. Spread across a 15-square-foot footprint, that is roughly 62 pounds per square foot. Most code-compliant bathroom floors are designed for 40 pounds per square foot live load plus dead load, so point loads from tub feet and the weight of the water should be evaluated by a qualified installer or contractor.

Electrical requirements depend on features. A basic soaking tub may need no dedicated circuit. A tub with a heated seat or hydrotherapy pump may require a 20-amp GFCI circuit. Electrical and permit costs run $300–$1,200. Shower conversions rarely need new electrical unless you add a steam generator, exhaust fan upgrade, or lighting.

## Door Seals and Long-Term Maintenance

Walk-in tub doors seal with a compressible gasket that mates with the tub frame. Over time, the gasket can compress permanently, crack, or collect soap scum that prevents a full closure. A leaking seal can damage the subfloor and ceiling below. Door seal replacement costs $150–$500, including labor. Inspect the seal every six months and clean it with a non-abrasive cleaner.

Shower conversions use a door sweep or magnetic strip on the glass door, plus caulk at the wall joints. These materials degrade faster than tub door seals in some cases because they face direct spray and sliding wear. Recaulking a shower corner costs far less than a tub seal replacement, but it may be needed more often.

Both options benefit from regular maintenance. Our walk-in tub repair guide covers common seal and latch issues, while our walk-in tub installation article explains what to expect during a professional install.

## Which Option Fits Your Bathroom

Choose an acrylic walk-in tub if you want a seated bath, already have a tub alcove, and want to keep the footprint around 5 feet by 32 inches. The unit cost is $1,500–$6,000, and installed standard pricing is $3,000–$10,000. Budget $150–$500 every few years for door seal replacement and $300–$1,200 for electrical and permits if your panel needs work.

Choose a walk-in shower conversion if you prefer standing access, want to eliminate the tub step, and have space for a curbless or low-threshold shower. Costs run $3,000–$12,000 installed. You avoid a tub door seal, but you gain a larger waterproofed area that depends on slope, caulk, and door sweeps.

If you are still deciding between a tub and a shower, our walk-in tub vs walk-in shower comparison covers space and accessibility trade-offs in more detail. For help finding a model, see our best walk-in tub overview. All pricing here is an estimate; request a written quote before signing a contract.

Next, compare [how much does walk in tub cost](https://walkintublab.com/how-much-does-walk-in-tub-cost/), [walk in tub installation](https://walkintublab.com/walk-in-tub-installation/), [walk in tub repair](https://walkintublab.com/walk-in-tub-repair/) before you commit.