Date calculators · Workdays & planning
Halfway Date Calculator
Find the middle of a project, a trip or a stretch of dates—and mark the milestones on either side.
Your calculation
Ready when you are
Choose your dates.
Select your counting rules and calculate.
Calculation details
| Step | Value |
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How to use this calculator
Enter the start and end dates. Use 50 percent for halfway, or choose another whole percentage from zero to 100. The table also shows the start, quarter, halfway, three-quarter and end points.
The percentage follows the input direction, so 25 percent of a reversed range is measured backward from its starting date. Date boundaries are equally spaced for calendar arithmetic. An odd number of days puts the halfway point at a half-day; this is not an actual zoned event time. Countdown handoff is offered only for a whole-date result.
A worked example
From November 1 to November 10, 2026 there are nine calendar days. Halfway is November 5 plus half a calendar day, shown as 12:00. A daylight-saving change does not change this date-based result.
Can I use this as an exact meeting time between two timestamps?
No. Inputs are dates without times or zones. The fractional-day display divides a notional calendar day, rounded to a minute. Use the Time Zones tools to plan an actual event and handle changing UTC offsets.
Which calendar and years are supported?
These tools use Gregorian calendar dates for years 1–9999, without historical calendar-switch dates. They count dates, not elapsed hours. Today buttons use the current date in your browser's time zone.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.