Remodeling
Bathtub Replacement Cost Calculator
Prices a bathtub, where getting the old one out and the new one in is often the hard part.
Result
A planning estimate, not a quote. Access, the age of the equipment, what is found once it is opened up and local labour rates all move the real figure, sometimes a long way.
Get a Free Business AuditHow the calculation works
Hours times crew times rate, plus materials and the call-out. Replacing a tub in the same position with a similar unit is a bounded job: remove the old, adjust the drain and supply as needed, set the new tub, and make good the surround. The cost rises sharply when the position or type changes, because the drain and overflow locations are fixed in the floor and moving them means opening the floor or ceiling below. A freestanding tub is a different proposition again, with exposed plumbing and a significant point load.
What moves the number
- Whether the drain location suits the new tub, since moving it means opening the floor.
- Alcove, drop-in or freestanding, which changes both plumbing and support.
- Access, as a cast iron tub is extremely heavy and may have to be broken up to remove.
- Whether the surround and waterproofing are being redone at the same time.
Where this one goes wrong
A filled freestanding tub is a large concentrated load on a small footprint, and a heavy material such as cast iron or stone resin with water and a person in it can exceed what a typical bathroom floor was designed for. That is a structural question worth asking rather than assuming, particularly on an upper floor or an older building. Removal is the other practical issue: a cast iron tub is extremely heavy and frequently cannot be carried out of a finished bathroom intact, so breaking it up in place is normal and is noisy, messy work that belongs in the quote. Mixing valve and scald protection requirements apply to the new installation.
Before you quote
- Check the floor structure for a heavy freestanding tub, especially upstairs.
- Confirm the existing drain location suits the new tub before quoting.
- Plan removal of a cast iron tub, including breaking it up if needed.
Where the rules come from
Questions
About this calculator
Can I put a freestanding tub anywhere?
Not without checking two things. The drain and supply have to reach the new position, which may mean opening the floor below, and a filled heavy tub with a person in it is a large concentrated load that a typical bathroom floor may not have been designed for. Both are worth establishing first.
Why is removing an old tub difficult?
A cast iron tub is extremely heavy and often cannot be carried out of a finished bathroom in one piece, so it is broken up in place. That is noisy, messy and takes time, and it belongs in the quote rather than being discovered. Modern acrylic tubs come out far more easily.
Does moving the tub cost much more?
Usually yes, because the drain and overflow positions are fixed in the floor structure. Relocating them means opening the floor, or the ceiling below, to reroute the waste with the correct fall. Keeping the new tub where the old one was avoids the largest single variable.
The formula
total = hours x people x rate + parts + call-out, then sales tax
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How to use this calculator
- Hours on site (h). Enter your own figure; the page starts at 160 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $88.
- Parts and materials ($). Enter your own figure; the page starts at $11,000.
- Call-out or diagnostic fee ($). Enter your own figure; the page starts at $95.
- Sales tax (%). Leave at zero if you are quoting before tax.
The result updates as you type, so you can try a figure, see what it does to estimated total, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Hours on site | 160 h |
| People needed | 1 |
| Labour rate charged | $88 |
| Parts and materials | $11,000 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $25,175 |
| Labour | $14,080 |
| Before tax | $25,175 |
| Sales tax | $0 |
About $25,175: $14,080 of labour, $11,000 of parts and a $95 call-out.
How sensitive the answer is
Holding everything else steady and changing only labour rate charged, this is what happens to estimated total. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Labour rate charged ($) | Estimated total |
|---|---|
| $44 | $18,135 |
| $66 | $21,655 |
| $88 example above | $25,175 |
| $132 | $32,215 |
| $176 | $39,255 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 160 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $88.
- Parts and materials ($)
- A money amount, starting at $11,000.
- Call-out or diagnostic fee ($)
- A money amount, starting at $95.
- Sales tax (%)
- Leave at zero if you are quoting before tax.
What the results tell you
| Result | What it is |
|---|---|
| Estimated total | The headline result. A money figure. |
| Labour | A money figure. |
| Before tax | A money figure. |
| Sales tax | A money figure. |
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.