Calculator
Labor Hours & Cost Calculator
A production rate tells you how many labour hours a job takes; it does not tell you how many calendar days it takes, and those two numbers move in opposite directions the moment more than one person shows up. Doubling the crew roughly halves the calendar, but it does not halve — or even necessarily lower — the bill, because setup and cleanup are charged per person, not per job, and a bigger crew means more of both.
This calculator keeps those two results separate on purpose: labour hours and the cost that follows from them, and calendar time, which is labour hours divided by however many people are actually swinging tools. It also checks whether the job fits inside a weekend at the crew size you entered, because that's usually the real question behind 'how long will this take' — not the total hours, but whether it finishes before Monday.
Calculate your quantity
sq ft per labour hour — painting runs 150-200, tiling 25-40.
Labour hours
16.3 hours
Labour cost
735 currency
- Production hours
- 8.3 hours
- Setup and cleanup
- 8 hours
- Calendar time with this crew
- 8.2 hours
- Working days
- 1.02 days
- Cost per square foot
- 1.47 currency/sq ft
- At 8.2 hours with 2 people, this fits a weekend.
- Adding people shortens the calendar, never the labour bill. Setup and cleanup are per person and get worse with a bigger crew.
Shopping summary
- • 16.3 labour hours at 45 per hour
- • 2 people for 1 working day(s)
This is an estimate — confirm structural work with a professional.
How this calculation works
Production hours come first, from area divided by a production rate expressed in square feet per labour hour — a rate that already represents combined effort, so it does not change when the crew size changes. A 500 sq ft paint job at 180 sq ft per labour hour is 2.8 labour hours whether one person does it in 2.8 hours or four people do it in 42 minutes; the total effort is fixed, only the calendar changes.
Setup and cleanup are different: they're entered per person and multiplied by crew size, because loading tools, mixing material, and packing up at the end genuinely happen once per worker, not once per job. That's the piece that keeps a bigger crew from being a pure win — it shortens the calendar reliably, but it adds real hours (and real cost) to the fixed side of the job that a smaller crew wouldn't have spent.
- Calendar time is labour hours divided by crew size — it shrinks with more people, but not in exact proportion, because the fixed hours grow with the crew at the same time.
- Cost is labour hours multiplied by the hourly rate, and labour hours include the fixed portion — so cost per square foot typically rises with a bigger crew even as the job finishes sooner.
- The weekend check compares calendar hours to twice the working-day length you entered, since a weekend is generally two working days regardless of how long each one runs.
- This page has no material cost in it at all; pair it with the material cost calculator for the other half of a job budget.
The formula
labourHours = area/productionRate + (setupHours + cleanupHours) x crewSize; cost = labourHours x hourlyRate; calendarHours = labourHours ÷ crewSize
- area / productionRate
- Production hours: the pure work content of the job, in labour hours, independent of how many people share it. Production rate is expressed as area covered per labour hour, which is why crew size doesn't appear in this half of the sum.
- (setupHours + cleanupHours) x crewSize
- Fixed hours: the per-person overhead of getting started and finishing up, multiplied by however many people are on site. This is the term that grows when you add crew, and it's what keeps a bigger crew from being cost-neutral.
- labourHours
- Total person-hours billed for the job — production plus fixed — the number the cost is calculated from. It is not the same as how long the job takes on the calendar once more than one person is involved.
- calendarHours
- labourHours divided by crewSize: how much real time passes with everyone working simultaneously. This is the number that answers 'when will it be done', as distinct from 'how much will it cost'.
- workdayHours
- The length of a single working day, used to convert calendar hours into working days and to test whether the job fits inside a two-day weekend at the crew size entered.
Production hours never change with crew size in this formula; only the fixed hours do. That's a deliberate simplification — it assumes the work itself parallelises perfectly across however many people show up, which is close to true for painting or tiling and less true for a job with a genuine sequencing bottleneck, like waiting for one coat to dry before the next person can start the next.
Where these numbers come from
- Production rate as sq ft per labour hour
- A convention this page adopts rather than a published figure: expressing a rate in labour hours (not calendar hours, not per-person hours) is what lets the same rate apply regardless of crew size. Actual rates vary enormously by trade, material and finish quality, which is why it's an input here rather than a constant — the field hint gives painting and tiling as reference points, not as fixed values.
- Setup and cleanup counted per person
- Derived on this page from how job sites actually run: each worker loads their own tools, mixes or fetches their own material, and packs up individually, so the time cost scales with headcount rather than being a single fixed block for the whole crew.
- Weekend feasibility at twice the working-day length
- A working convention this page uses for a specific, common question — does this fit a weekend — rather than a labour-law or scheduling standard. Adjust the working-day-length field for a crew that works longer or shorter days than the 8-hour default.
Worked examples
A one-person weekend paint job
| Area to cover | 400 sq ft |
|---|---|
| Production rate | 180 |
| Crew size | 1 |
| Hourly rate | 35 |
| Setup hours per person | 1 |
| Cleanup hours per person | 1 |
| Working day length | 8 |
| Labour hours | 4.2 hours |
|---|---|
| Labour cost | 147.78 currency |
| Production hours | 2.2 hours |
| Setup and cleanup | 2 hours |
| Calendar time with this crew | 4.2 hours |
| Working days | 0.53 days |
| Cost per square foot | 0.37 currency/sq ft |
Production alone is 2.2 hours on this job; the other 2 hours are entirely one person's own setup and cleanup, which is nearly half the total time for a job this size. At a single worker, labour hours and calendar hours are identical — 4.2 of each — because there's no crew to divide the total across.
This is the baseline the next example is worth comparing against: a small job, one person, comfortably inside a single afternoon, at a cost per square foot of 37 cents. Nothing about the crew-size tradeoff shows up here, because there's only one crew size to look at.
The same production rate on an eight-times-larger job with a four-person crew
| Area to cover | 3200 sq ft |
|---|---|
| Production rate | 180 |
| Crew size | 4 |
| Hourly rate | 35 |
| Setup hours per person | 1 |
| Cleanup hours per person | 1 |
| Working day length | 8 |
| Labour hours | 25.8 hours |
|---|---|
| Labour cost | 902.22 currency |
| Production hours | 17.8 hours |
| Setup and cleanup | 8 hours |
| Calendar time with this crew | 6.4 hours |
| Working days | 0.81 days |
| Cost per square foot | 0.28 currency/sq ft |
Run the same 3,200 sq ft job with a single person instead and it comes to 19.8 labour hours and 692.22 in cost — production hours are identical either way, since the rate is already per labour hour, but a solo worker only pays for 2 hours of fixed time instead of 4 people's worth of 8. Adding the crew raises the bill by about 210, roughly 30% more, purely from tripling the setup and cleanup overhead.
What that extra 210 buys is the calendar: 6.4 hours with four people against 19.8 hours solo — under a day instead of the better part of three. That's the actual tradeoff this page exists to show plainly: a bigger crew is not a cheaper way to do the same job, it's a faster one, and whether the difference in cost is worth the difference in calendar time is a decision this page can inform but not make for you.
Common mistakes
- Assuming a bigger crew lowers the total bill. It almost never does, because fixed hours scale with headcount — a bigger crew buys a shorter calendar, not a smaller invoice.
- Using a production rate measured for one person as though it already accounts for a crew. If your rate was clocked with a single worker, it's still correct per labour hour with a crew of four; the mistake is dividing it by crew size before entering it here, which double-counts the parallelisation the formula already handles.
- Forgetting that setup and cleanup happen once per person, not once per job, when estimating a large crew. Ten people each spending 30 minutes packing up is 5 labour hours gone before anyone drives away, not 30 minutes.
- Comparing cost per square foot across jobs of very different sizes without noting the crew size behind each figure. A small job with a lean crew and a large job with a big one can show very different cost-per-square-foot numbers for reasons that have nothing to do with the material or the trade.
- Treating the weekend-feasible flag as a guarantee rather than a plan. It compares calendar hours to a clean two-day window; weather, material delivery delays, and drying time between coats are not in this calculation at all.
Shopping summary
There's nothing to buy from this page directly — it prices time, not material. Run the material cost calculator for the other half of the budget, and if the job also needs a self-hauled load of bulk material on top of the labour, the bulk delivery calculator covers how many trips that takes.
Before settling on a crew size, try the same job at two or three different crew sizes and compare both the cost and the calendar side by side — the point at which adding one more person stops meaningfully shortening the timeline, while still adding a full person's worth of setup and cleanup to the bill, is usually obvious once you see it laid out rather than guessed at.
FAQ
Why does adding a fifth person to a four-person crew sometimes barely change the calendar time?
Past a certain crew size, each additional worker's own setup and cleanup overhead starts to eat into the calendar savings they bring — the fifth person shortens the day, but they also bring their own fixed hour or two of loading and packing, and on a job where the production work itself is already fairly quick, that fixed overhead can be a bigger share of what they add than the production time they take off everyone else's plate. Watching the marginal change from adding one more person, rather than assuming it scales evenly, is the way to catch the point where a bigger crew stops paying for itself.
Does this calculator account for a crew working different roles at different rates?
No — it assumes one hourly rate and one production rate across the whole crew. For a job with, say, a lead at one rate and helpers at another, run this page once for the total labour-hours figure and apply a blended rate separately, or split the job into the portions each rate applies to and run them individually.
What if the job has a bottleneck that stops it from parallelising, like a single coat that has to dry before the next step?
This page assumes production hours scale down cleanly with crew size, which holds for jobs where more hands genuinely do more work in parallel. A drying or curing bottleneck doesn't shrink with more people on site, so a job with one should be split into the parallelisable portion and the fixed-duration wait, and only the first part run through this calculator.
Is the hourly rate meant to be a wage or a fully loaded labour cost?
Whichever you enter — the calculation doesn't distinguish between a straight wage, a burdened rate including insurance and overhead, or a contractor's billed rate. Use whichever figure you actually need to plan against, and be consistent about it if you're comparing two crew-size scenarios.
Why is there no material waste factor on this page?
Because labour hours aren't wasted the way material is — cutting a board wrong costs a board, not an extra hour of someone's day in this model. If rework is a real risk on a given job, the honest way to account for it here is a higher production-rate estimate (i.e., a lower rate that already assumes some redone work) rather than a separate waste field.
Can crew size be a fraction, like 1.5 for part-time help?
The field accepts it, but the fixed-hours term will scale accordingly, which may not reflect reality — a half-time helper who does a full setup and cleanup routine doesn't cost half the fixed time, they cost the same fixed time in less of the working day. For part-time or split-shift crews, it's usually more accurate to run this page once per distinct crew configuration and add the results.
Where to go next
The projects this number is a step of, the guides that explain the method behind it, and the rest of its trade group.