Weighted Milestone Calendar
Place project milestones using unequal phase weights, total effort and available working hours. See partial-day milestones and capacity shortfalls.
Starts with an editable example. Replace the dates and rules with your own.
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Select your counting rules and calculate.
Calculation details
| Step | Value |
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How to use this calculator
Enter the planning range, working calendar, total hours and hours available per working day. List phases in order with their relative effort weights.
Weights split the total effort proportionally. Cumulative effort is allocated across working dates; more than one milestone can land on a date. A plan beyond the entered capacity reports the missing hours without inventing a finish date.
A worked example
A 60-hour project with weights 1 and 2 allocates 20 and 40 hours. At six hours per weekday from November 2, 2026, milestones fall on November 5 and 13.
How is this different from a halfway-date calculator?
Halfway Date splits a calendar span by percentage. This tool consumes working capacity according to unequal phase effort and excludes non-working dates.
Which calendar and years are supported?
Use Gregorian dates from 1900 through 2100, with results in that range. Daily attendance, office, coverage and chore plans allow up to 366 dates; school cycles, course plans and milestones allow up to 731. Dependency and historical workday calculations scan at most 3,661 dates. Class-session searches allow 366 dates and 200 sessions. Time-zone tools use browser IANA rules and require a choice when local times repeat. Dates and policy rules are entered manually; no employer, retailer, school or local weather policy is inferred. Copy, CSV and printing include the calculation rules; calendar exports appear when the result contains dated events.
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.