Project Timeline Calculator
Plan a simple project timeline by entering a start date, estimated duration in weeks, and optional buffer.
Continue with another calculation
Core Week Calculator
Convert dates to ISO weeks, turn week numbers into date ranges, calculate weeks between dates, add/subtract weeks and count from today.
Open →Date & Work Calculators
Use separate pages for days between dates, business days, working days and week numbers.
Open →Week Calendar
Browse ISO weeks by year with Monday-to-Sunday ranges and highlighted current week.
Open →When to use this tool
Turn a rough week-based estimate into a clear end date and total project duration.
Practical uses
Plan a simple project timeline by entering a start date, estimated duration in weeks, and optional buffer.
These planning tools are designed for quick answers, but they also work well as part of a bigger workflow. You can pair them with the year calendar, current week page and week guides to plan projects, delivery windows, payroll cycles, reporting periods and deadlines.
FAQ
Why add buffer weeks?
A small buffer protects the project from review delays, rework and scheduling changes.
Is this a full project manager?
No. It is a fast planning tool for estimating a timeline in week-based blocks.