Free working days calculator
Ten working days is two calendar weeks. The two are used interchangeably in proposals and emails, and they are not the same promise — which is how a deadline you set yourself, in writing, gets missed by four days without anyone working slowly. This calculator converts honestly in both directions: give it a start date and a count of working days and it returns the real delivery date; give it two dates and it counts the working days sitting between them. Start on Monday 2 November 2026 and ten working days lands on Monday 16 November — fourteen calendar days later. Weekends are skipped. Public holidays are not subtracted, and the method below says plainly why.
From a count of days to a delivery date
The convention, stated once and used everywhere on this page: counting starts on the next working day after the start date. Start on a Monday with five working days and delivery lands on the following Monday. Zero working days means the start date itself — rolled forward to the next working day when the start falls on a weekend.
Your delivery date
Pick a start date and the delivery date appears here.
| Start date | — |
| Working days promised | — |
| Extra days skipped | — |
| Delivery date | — |
| Calendar days elapsed | — |
Working days are counted from the next working day after the start date; Saturdays and Sundays are skipped. Public holidays are not subtracted — they vary by country and change by year — so add any that fall inside your span as extra days to skip, and the date moves on.
Count the working days between two dates
Run it backwards before you quote: a client who needs delivery by a fixed date has set your working-day budget, and this is the count of it. The same span that reads as a comfortable month on the calendar can hold surprisingly few days you can actually work.
The working days in the span
Pick a start date and an end date.
| Start date | — |
| End date | — |
| Calendar days in the span | — |
| Weekdays (Monday to Friday) | — |
| Weekend days | — |
| Holidays you subtracted | — |
| Working days | — |
Pick both dates and the count appears here. Working days are the Monday-to-Friday days after the start date, up to and including the end date.
Worked example
A project is quoted on Monday 2 November 2026 at ten working days. Enter that start date and count above and the calculator returns exactly this:
| Start date | Monday 2 November 2026 |
| Working days promised | 10 |
| Extra days skipped | 0 |
| Delivery date | Monday 16 November 2026 |
| Calendar days elapsed | 14 |
Now mark one public holiday inside that span — set the extra days to skip to 1 — and delivery moves one working day later, to Tuesday 17 November. That is the whole mechanism: a holiday does not pause the count, it consumes one of the days the count was going to use. Read the same month backwards in the count mode: Monday 2 November 2026 to Monday 30 November 2026 is 28 calendar days, of which 8 fall on Saturdays and Sundays — leaving exactly 20 working days. A full month, and four working weeks is all that was ever in it.
How it works
- Counting starts the next working day. The start date is when the clock is set, not a day of work: a deposit that clears on Monday buys its first working day on Tuesday. This is the convention most clients assume when they read "ten working days" in a proposal, and it is the safer one to promise on — the alternative quietly gives away the start day. Zero working days is the one exception: it means the start date itself, rolled forward when the start falls on a weekend, because a delivery promised for a Saturday is a delivery that happens on Monday whatever the document says.
- The count mode runs the same rule backwards. The start day is not counted; every day after it is, up to and including the end date. Because both modes share one convention, they agree: count the working days between a start date and the delivery date the first mode produced, and you get back exactly the number you put in. Tools whose two directions disagree by a day are how deadlines drift.
- Public holidays are not modelled — deliberately. They vary by country, sometimes by region and industry, and governments move them from year to year. A calculator that subtracted one country's holidays without saying so would print confident, wrong dates for everyone elsewhere. So this page skips Saturdays and Sundays only, states the limit in the results, and hands you the two counters instead: holidays subtracted in count mode, extra days skipped in deadline mode. Your calendar, your holidays, no silent assumptions.
- Quote the date, not the count. "Ten working days" feels precise and lands differently in every reader's head — some count the start day, some forget the holiday in the middle, some quietly hear two weeks. A date is unambiguous. Work the count here, then write the date it produces into the proposal and the scope of work, where the timeline belongs in dates both sides can circle on a calendar.
- Stage durations are counts; stage deadlines are dates. Inside a project, a stage that takes five working days is a fine plan — but the milestone payments guide ties each payment to a deliverable, and the deliverable's expected arrival is where this calculator earns its place: convert each stage's count from the day the previous stage is approved, and the whole schedule sits in real dates before the client ever sees it.
- Give a date the same buffer you give a price. A price built without a buffer is a hope, and a deadline built without one is the same hope wearing a calendar. If the honest count is ten working days, the date worth promising is the one the count produces plus the slack your project price already carries for the work itself — because the day that goes wrong was never going to announce itself in advance. The project timeline estimator runs that whole chain as one tool: your hours and a buffer become your days, the wait for the client’s inputs and their review rounds become theirs, and the delivery date — with the split between the two calendars shown — comes out the far end.