Voltti
Voltti
Count the workdays between two dates, or add and subtract business days from a date. Weekends and US federal holidays are left out for you, with no signup.
A business days count tells you how many workdays you have. If you work on a computer, Voltti counts the real hours in those workdays for you, in every app and work website, with no timer to start or stop. Its monthly streak counts weekdays only, so a weekend off never breaks it.
Worked example. November 1 to November 30, 2026, counting both dates, is 30 calendar days. November 1 is a Sunday, so the month has 5 Sundays and 4 Saturdays: 9 weekend days, which leaves 21 weekdays. Veterans Day (Wednesday, November 11) and Thanksgiving (Thursday, November 26) fall on weekdays, so take out 2 more. That gives 19 business days.
These are the days the calculator skips. When a holiday falls on a Saturday it is observed on the Friday before, and on a Sunday it is observed on the Monday after.
| Holiday | 2026 | 2027 |
|---|---|---|
| New Year's Day | Thu, Jan 1 | Fri, Jan 1 |
| Martin Luther King Jr. Day | Mon, Jan 19 | Mon, Jan 18 |
| Washington's Birthday | Mon, Feb 16 | Mon, Feb 15 |
| Memorial Day | Mon, May 25 | Mon, May 31 |
| Juneteenth | Fri, Jun 19 | Fri, Jun 18 (observed) |
| Independence Day | Fri, Jul 3 (observed) | Mon, Jul 5 (observed) |
| Labor Day | Mon, Sep 7 | Mon, Sep 6 |
| Columbus Day | Mon, Oct 12 | Mon, Oct 11 |
| Veterans Day | Wed, Nov 11 | Thu, Nov 11 |
| Thanksgiving Day | Thu, Nov 26 | Thu, Nov 25 |
| Christmas Day | Fri, Dec 25 | Fri, Dec 24 (observed) |
January 1, 2028 is a Saturday, so New Year's Day 2028 is observed on Friday, December 31, 2027. The calculator counts it too.
A business day is any day from Monday to Friday that is not a public holiday. In the US that usually means weekdays other than the 11 federal holidays.
When counting days between two dates, the start date counts and the end date does not, unless you tick Include the end date. When adding business days, the count starts the day after your start date, so 1 business day after a Friday is the next Monday.
The 11 US federal holidays: New Year's Day, Martin Luther King Jr. Day, Washington's Birthday, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day and Christmas Day. They're worked out by rule for any year. Untick Skip US federal holidays to count them as normal weekdays.
The calculator uses the federal rule. A holiday on a Saturday is observed on the Friday before, and a holiday on a Sunday is observed on the Monday after. Your employer or state may follow different rules.
Pick Add or subtract days, choose a start date and enter the number of business days. The calculator steps forward or back one day at a time, skipping weekends and holidays, and shows the date you land on.
Your dates stay in your browser so they're still there when you come back. Nothing is sent to a server.
If you work on a computer, yes. Voltti for Mac and Voltti for Windows record every real minute in your apps and work websites, with no timer to start or stop. The free plan includes automatic tracking.