Bathtub to Shower Conversion Cost & Where to Buy Kits Online

When homeowners or DIYers start researching the cost of converting a bathtub to a shower, one of the first surprises is how wide the range can be. A modest kit-based conversion may cost a few hundred dollars, while full remodels can reach several thousand. This article focuses on the more economical route: a DIY tub-to-shower kit. We’ll explain pricing, budget strategies, how walk-in tub conversion costs compare, and where to buy conversion kits online—all within the context of budget-friendly bath remodeling and affordable accessibility upgrades.

Understanding What a DIY Conversion Kit Does

A DIY bathtub-to-shower conversion kit allows you to modify an existing bathtub so you can step through the tub wall more easily. Typically, a section of the tub’s wall is cut out, and a prefabricated insert creates a lowered threshold. These kits usually include the insert, adhesive, template, and instructions. They don’t include every installation material—buyers often need to supply sealant or trim. Still, this option is much more affordable than a full remodel and keeps most of your existing bathroom intact.

One well-known option is The Step Through Store, which sells a “Step Through Insert” designed to convert tubs without removal. The existing tub remains in place, making it a cost-effective and minimally disruptive solution for accessibility upgrades.

Cost Breakdown: How Much Does It Actually Cost?

When estimating the cost of converting a bathtub to a shower with a DIY kit, several factors affect the total:

Kit price: Typically between USD 300–600 for the insert, adhesive, and template.
Shipping & import fees: International orders may add extra costs.
Consumables: Sealants, trim, and screws can add USD 30–100.
Preparation: Cleaning or sanding old tubs may raise costs slightly.
Extra parts: Some kits fit only standard tub shapes, so additional trim may be needed.

In most U.S. markets, a complete DIY kit conversion costs USD 700–800 or less, making it a highly budget-conscious accessibility project. By comparison, a professional conversion or walk-in tub installation can be several times that amount.

Walk-In Tub Conversion Costs: A Comparison

While full walk-in tubs may include low-threshold access and other built-in features, The Step Through Store kits only modify the existing bathtub wall to create a safer step-through entrance — without adding new fixtures or integrated systems that can raise prices to between USD 2,000 and 10,000+ and also require extensive installation.

For homeowners pursuing affordable accessibility upgrades, the DIY approach offers the same essential benefit—easier entry—without the burden of high labor or replacement costs. It’s a straightforward, budget-friendly bath remodeling alternative.

Factors That Affect the Cost

Although basic, a conversion kit’s price can shift due to tub material, shape, and local conditions:

Tub material: Acrylic or fiberglass tubs are easier to modify than heavy cast iron.
Wall thickness: Unusually thick tub walls may need extra filler or trim.
Distance from supplier: Long shipping routes increase costs.
Installation errors: Mistakes in cutting or fitting can require replacement parts.
Regional pricing: Sealants and adhesives vary in cost by area.

Ultimately, the final project cost depends on careful measurement, clean installation, and smart purchasing decisions.

Average Cost Ranges (By Region)

Here’s a simplified breakdown of regional cost expectations:

U.S. domestic market: USD 350–600 for kits, plus USD 50–150 in finishing materials.
Imported kits: Add 20–40% for shipping or customs.
Older tubs or custom fits: Add USD 50–100 in materials.

At large retailers cost around USD 370. Premium safety bath suppliers (for example, Tub Kits) may charge USD 500+ for more durable inserts.

Overall, most homeowners can expect a total cost between USD 400 and USD 750 depending on local supply and add-ons.

How to Stretch Your Budget

To achieve budget-friendly bath remodeling results while maintaining safety and quality:

Buy domestically to cut down on freight costs.
Shop sales or clearance events at specialty stores.
Choose standard sizing—custom trimming increases waste.
Reuse existing finishes since the tub and wall remain in place.
Combine orders to reduce multiple shipping charges.
Buy adhesives locally when cheaper equivalents are available.

By following these strategies, it’s possible to reduce the overall conversion cost by 10–20%.

Where to Buy Tub Conversion Kits Online

There are several reputable sources for DIY tub-to-shower conversion kits. Remember that kits may not include every finishing component.

Specialty Accessibility Stores

The Step Through Store – Sells a one-design Step Through Insert that adapts standard tubs into step-through configurations while maintaining the original structure. It’s a leading example of affordable accessibility upgrades that don’t require removing the bathtub.
Safety Bath / Tub Kits – Offers step-thru inserts for tubs up to eight inches thick, focusing on durable, molded solutions.

Example Product Options

Some related kits help adapt or repair tub areas, though they’re not step-through systems themselves.

These examples show different types of tub inserts available online. To ensure optimal results, always confirm compatibility and product details before purchase.

How to Choose a Kit That Works

To avoid issues, review a few technical specifications before buying:

Wall thickness compatibility: Most inserts fit tubs up to 6–8 inches thick. Check before purchase—some, like the Safety Bath Step-thru kit, confirm this range.
Material quality: Look for high-density polyethylene or reinforced plastics for durability.
Warranty coverage: Reputable brands often provide long-term warranties on the insert body or seal.
Template precision: A reliable cutting template minimizes waste and errors.
Ease of adjustment: A kit that trims easily helps with irregular tub profiles.

Always ensure the product you select is marketed as a step-through conversion insert, not a wall or surround replacement.

Steps to Success (At a Glance)

Follow these simplified steps for a successful DIY bathtub-to-shower conversion:

Measure your tub’s wall thickness and length.
Choose a compatible step-through insert kit.
Order from a trusted supplier like The Step Through Store.
Dry-fit the template before cutting.
Cut the marked tub section carefully.
Insert and align the conversion piece.
Seal with adhesive per instructions.
Allow full curing time before use.
Finish edges with trim if necessary.

Because these kits modify only the bathtub wall, they are suitable for homeowners who want to improve accessibility without major renovation work.

Where to Buy Bathtub to Shower Conversion Kits in North America

For homeowners in the USA and Canada seeking a safer and more accessible bathroom, a tub-to-shower conversion kit provides an efficient middle ground. A DIY insert is one of the most cost-effective ways to make a bathtub easier to access and use.

Before buying, check your tub’s material and dimensions, review warranty terms, and budget for small finishing materials. Once ready, explore specialized suppliers such as The Step Through Store, which focuses on practical and cost-effective insert kits.

With thoughtful planning, you can enjoy a budget-friendly bath remodeling project that enhances accessibility and comfort—without replacing your bathtub or overspending on complex installations.