Bathroom Renovation Cost Calculator – Add Up Your Remodel Line by Line

Where the money goes

The table below breaks your total into shares, so you can see at a glance which line is driving the estimate. It updates live as you change any price.

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How it works

Budgeting a bathroom remodel, explained

Reading the estimate: total, shares, and cost per square foot

The result on this page has three layers, and each one answers a different question about the same remodel. The total estimate answers how much, in dollars, your entered lines add up to. The breakdown table answers where the money goes, line by line, as amounts and as shares of the total. The cost per square foot answers how the total compares with other quotes for the same bathroom, by dividing the total by the floor area. The default case shows all three layers at once: fixtures $8,000.00, tile $3,000.00, labour $2,500.00, and all other lines at $0.00, for a total estimate of $13,500.00, with shares of 59.3 percent fixtures, 22.2 percent tile, and 18.5 percent labour, and a cost of $90.00 per square foot for a 150 square foot bathroom. Every figure in this section was read from the calculator’s own displayed results for the stated inputs, and all figures here are the reader’s own entered prices, not averages or quoted rates.

Fill in every line, and the picture changes in a way that teaches how to read the result panel. Add plumbing $1,500.00, electrical $800.00, permits $300.00, and other $200.00 to the default lines, and the total becomes $16,300.00, with a cost of $108.67 per square foot for the same 150 square foot bathroom. The result panel shows fixtures $8,000.00, tile $3,000.00, labour $2,500.00, and then a single grouped line, all other lines combined $2,800.00, which is the sum of the four lines just added. The breakdown table beneath it shows each of those four lines separately, so the grouping in the panel is a summary, not a loss of detail: the panel answers how much at a glance, the table answers where exactly. If the grouped line surprises you, the table is where to look, and if a single line in the table surprises you, the quote behind that line is where to look, because the calculator only adds what you typed.

Shares are the diagnostic layer, and the base guide gives the rule for reading them: if one line is more than half the total, that is the line worth getting a second quote on first. On the default estimate, fixtures at 59.3 percent clear that threshold, so fixtures are the first line to re-quote, while tile at 22.2 percent and labour at 18.5 percent follow. On the full-lines estimate of $16,300.00, fixtures are $8,000.00 out of $16,300.00, which is about 49 percent, so no single line clears half, and the diagnostic shifts: the question becomes whether the four smaller lines, $2,800.00 combined, contain any single line that deserves a second quote, which the breakdown table answers line by line. Shares also reveal when a project changes character: moving a toilet or shower adds plumbing and wall work, which can push labour past fixtures, and the moment labour’s share passes fixtures’ share, the project’s risk has moved from product choice to installation complexity, which is a different conversation with a contractor.

Cost per square foot is the comparison layer, and the table shows why it must always be quoted with its area. The same $13,500.00 total is $90.00 per square foot in a 150 square foot bathroom and $135.00 per square foot in a 100 square foot bathroom, because the total did not change while the area did. Neither figure is wrong, and neither figure alone describes the remodel: the $135.00 figure describes a smaller bathroom with the same fixtures and labour, which is naturally more expensive per square foot, since fixtures cost the same whatever the floor area. Comparing two contractors’ per-square-foot figures is only fair when the areas are the same bathroom, and comparing two bathrooms’ per-square-foot figures is only fair when the fixture levels are similar, because a luxury fixture package raises the per-square-foot figure without any change in area. The base guide states the limit plainly: cost per square foot is a comparison tool, not a quality score, and a higher figure can mean better fixtures, not a worse deal.

The area-zero case in the table is the page’s honest handling of a missing input, and it is worth noting because many calculators invent a figure here. With the floor area left at 0, the total is still $13,500.00, because the total does not depend on area, but the cost per square foot shows the prompt “Enter floor area” instead of a number, because dividing by zero has no answer. That prompt is the correct behaviour, and it tells you exactly what is missing: enter the bathroom floor area, in square feet, and the figure appears. Measure the area as length times width in feet for a rectangular bathroom, and for an irregular bathroom, split the floor into rectangles, measure each, and add them, rather than guessing a single area, because every square foot of area error moves the per-square-foot figure, while the total stays correct. The total is robust to area errors; the per-square-foot figure is not, which is another reason to quote them together.

Budgeting line by line: what each line is, and what it hides

Each of the seven lines has a distinct character, and budgeting well means understanding what belongs on each line and what is commonly left off it. Fixtures are the visible products: bath, shower, toilet, basin, taps, and any fitted furniture, and they usually lead the total, as they do on the default estimate at 59.3 percent. Fixture prices vary more than any other line, because the same bathroom can be fitted at very different product levels, so a fixtures figure without a product list behind it cannot be compared with another fixtures figure: two $8,000.00 fixtures lines can describe entirely different bathrooms. Always attach the product list to the fixtures line, item by item, before comparing quotes, or the comparison will reward the quote that omitted the most.

Tile is the line most often underestimated, because it is quoted by area while its cost drivers are edge work, pattern, and waste. A plain field tile in a rectangular room is the cheapest tile job; a patterned tile, a mosaic border, a tiled niche, or a room full of corners and pipework adds cutting time and waste that a per-square-foot tile price alone does not capture. Labour is the line that moves most when the layout moves: keeping every fixture where it already is keeps labour near its simplest, while moving a toilet or shower adds plumbing, wall work, and floor work, and can push labour past fixtures as the largest line. Plumbing, electrical, and permits are the lines most often assumed to be included in another line, and the base guide warns against exactly that assumption for permits: permit rules and fees vary by location, so check with the local authority and add the fee on the permits line rather than assuming it is included in a labour quote. The same discipline applies to plumbing and electrical: if a quote does not itemise them, ask whether they are included, and if they are not, add them as their own lines rather than discovering them mid-project.

The Other line is the catch-all, and catch-alls deserve suspicion in both directions. Legitimate Other items include anything unusual that fits no standard line: a heated floor element, a custom mirror, a ventilation upgrade, or disposal of the old suite. Illegitimate Other items are standard lines hidden in the catch-all to make the standard lines look smaller, which defeats the whole purpose of a line-by-line estimate. If the Other line grows larger than any standard line, unpack it: list its contents, price each, and move anything standard back to its own line. The full-lines case on this page keeps Other at $200.00, the smallest line, which is how a catch-all should look: a home for genuine extras, not a hiding place for real costs.

Contingency is not a line on this page, and that absence is deliberate, because contingency is a budgeting decision, not a remodel cost. The base FAQ reports that most remodel guides suggest holding back 10 to 20 percent for surprises behind walls, such as water damage or old wiring, and adding that amount to the total shown here when setting a real budget. On the default total of $13,500.00, 10 percent is $1,350.00, for a budget of $14,850.00, and 20 percent is $2,700.00, for a budget of $16,200.00. Those budget figures are arithmetic on the displayed total, not separate calculator displays, and they should be written down as budget figures, not typed into the calculator as costs, because typing contingency into a cost line would corrupt the shares and the per-square-foot comparison. Keep the estimate, the contingency, and the budget as three separate numbers: the estimate is what the lines add to, the contingency is what surprises might add, and the budget is the sum, held aside before work starts.

Comparing contractor quotes on this page’s basis is the whole point of the per-square-foot figure, and it works only if the quotes are itemised on the same lines. Ask each contractor for the same seven lines, fixtures, tile, labour, plumbing, electrical, permits, and other, plus the floor area used, and enter each quote separately, noting the total and the per-square-foot figure for each. If one quote’s total is far higher per square foot, the breakdown table shows exactly which line to ask about, as the base guide says, and the question to ask is specific: which product, which scope, or which fee explains this line’s difference. A quote that cannot be itemised on these lines cannot be compared on this page’s basis, and that itself is information: an unitemised quote hides exactly the differences the line-by-line method exists to expose. The calculator’s estimate is a planning figure built from your entered prices, not a contractor quote, and a contractor quote is the binding figure, which should itemise the same lines so the two can be compared line by line.

What the estimate does not include, and the checks before committing

The estimate includes exactly what you typed, and nothing else, which means the gaps are yours to list, not the page’s to guess. It does not include a contingency unless you add one to your budget separately, as described above. It does not include permit fees unless you entered them on the permits line, and permit rules vary by location, so the local authority is the source, not any national figure. It does not include hidden conditions behind walls, such as water damage or old wiring, which are precisely what contingency is for. It does not include the cost of alternative accommodation during the work, time off work, or any finish or fixture you forgot to list, and a forgotten line is the most expensive gap of all, because it is discovered after the budget is set. Run through the bathroom physically, fixture by fixture and surface by surface, and confirm each has a line and a price, before treating any total as final.

Three checks, done before committing to a budget, catch most errors. First, re-read the breakdown shares: any line at 0 percent that should not be zero, such as permits on a job that needs them, or electrical on a job that moves lighting, is a missing price, not a saving. Second, re-read the per-square-foot figure against the area: if the area is wrong, the figure is wrong, and the total alone will not reveal it, because the total does not depend on area. Third, compare the total with at least one itemised contractor quote, line by line, and investigate every line where the two differ by more than a small amount, because a large difference on one line usually means a scope difference, a product difference, or a missing item, and each of those has a different remedy. A quote that matches your estimate on every line is a quote you can trust; a quote that differs on one line is a conversation, not a rejection, and the line tells you what to ask about.

The page’s own disclaimer frames all of this correctly: this calculator gives a planning estimate from the prices you enter, it is not a contractor quote, and real remodel costs vary with location, fixture choices, hidden conditions behind walls, and permit rules. Get itemised quotes from licensed contractors before committing to a budget, and let those quotes, not this page, be the binding figures. The page’s job is to make your own numbers add up transparently, to show where the money goes, and to give you a fair basis for comparing quotes. Used that way, it saves money not by finding a cheaper total, but by finding the line where a cheaper total would come from, and the question that unlocks it.

Worked comparisons: the same bathroom, three budgets

The clearest way to use this page is to run the same bathroom three times, once per quote, and compare the three runs line by line. Take the default bathroom at 150 square feet. Quote A is the default lines: fixtures $8,000.00, tile $3,000.00, labour $2,500.00, rest $0.00, total $13,500.00, $90.00 per square foot. Quote B is the full-lines case: the same three lines plus plumbing $1,500.00, electrical $800.00, permits $300.00, and other $200.00, total $16,300.00, $108.67 per square foot. The $2,800.00 difference between the two quotes is entirely the four lines Quote A left at zero, which means Quote A was not cheaper, it was less complete, and the per-square-foot gap of $18.67 is the price of completeness, not of quality. A reader who compared only the totals would choose Quote A and discover the missing $2,800.00 during the work; a reader who compared line by line sees that Quote B includes work Quote A omitted, and can ask Quote A to price those lines before deciding.

A third run shows the area trap in the same format. Quote C is the default lines in a 100 square foot bathroom: total $13,500.00, $135.00 per square foot. Quote C’s total equals Quote A’s total, but its per-square-foot figure is $45.00 higher, because the same fixtures and labour are spread over fewer square feet. A reader comparing Quote A and Quote C on per-square-foot figures alone would call Quote C expensive, but the totals are identical, and the difference is entirely the bathroom size. The remedy is always the same: compare totals for the same bathroom, compare per-square-foot figures only across quotes for the same bathroom, and never compare per-square-foot figures across different bathrooms as if they measured the same thing. Fixtures cost the same whatever the floor area, so smaller bathrooms are always more expensive per square foot at the same fixture level, and that is arithmetic, not overcharging.

Keep a record of each run, because a remodel decision is rarely made in one sitting. The page’s copy control copies the result text, which includes the total and the lines shown, and that text pasted into a note, together with the area and the date, is enough to reconstruct any run later. Label each run with the contractor or the scenario, such as “Quote A, fixtures as listed, permits excluded” or “Quote B, all lines included”, because an unlabelled total from last week cannot be compared with a new quote this week. The estimate is only as useful as its labels: a total without its lines, its area, and its inclusions is a number without a meaning, and a number without a meaning cannot support a budget decision.

Measuring the area, and why small bathrooms look expensive per square foot

Floor area is the only input that moves the per-square-foot figure without moving the total, so it deserves a measurement method, not a guess. For a rectangular bathroom, measure length times width in feet, wall to wall, ignoring the fixtures, because the floor area is the floor, not the free floor after the bath and basin are placed. For an L-shaped bathroom, split the floor into two rectangles, measure each, and add them. For a bathroom with a curved or angled wall, split it into a rectangle plus a triangle, measure both, and add them, accepting that the triangle is an approximation unless the angle is exactly 45 or 90 degrees. Write the measurements down, not just the product, because a per-square-foot figure challenged later can only be defended from its measurements, and a single area number without its length and width behind it cannot be checked.

Small bathrooms always look expensive per square foot at the same fixture level, and the reason is arithmetic, not overcharging. Fixtures cost the same whatever the floor area: the same $8,000.00 fixtures line in a 150 square foot bathroom gives $90.00 per square foot on the default total, while in a 100 square foot bathroom it gives $135.00 per square foot on the same total, because the total is unchanged while the divisor shrank by a third. A powder room with a small area and a full fixture set will therefore show a per-square-foot figure far above a primary bathroom’s, even when its total is far below, and comparing the two figures as if they measured value would punish the smaller room for being small. Compare per-square-foot figures only across quotes for the same bathroom, compare totals across bathrooms, and never let a per-square-foot figure alone decide whether a small bathroom’s remodel is good value, because the figure is dominated by the area, not by the work.

There is a related trap in the other direction: a large bathroom with a modest fixture level can show a low per-square-foot figure while its total is high, because the area divisor is large. A $16,300.00 total in a 150 square foot bathroom is $108.67 per square foot, but the same total in a 300 square foot bathroom would be about $54.33 per square foot, which sounds economical until the total itself is read. The per-square-foot figure rewards large areas and punishes small ones, whatever the work costs, so it must always travel with its total and its area, as the page’s result does. A quote described only by its per-square-foot figure, without its total and its area, is undescribed, and a budget built on such a quote is built on a ratio, not on a price.

Finally, measure twice when the area is disputed, because area disputes are the cheapest disputes to settle and the most expensive to leave. Two people measuring the same bathroom should agree within a square foot or two on a rectangular room, and a larger disagreement means one of them measured to the wrong points, included or excluded an alcove, or used inches where feet were needed. Resolve the measurement before comparing quotes, not after choosing one, because every per-square-foot comparison inherits the area error, while the totals do not. The total is the money; the per-square-foot figure is the comparison; and the area is the bridge between them, so the bridge must be measured, not assumed.

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