Deadline Calculator
Estimate a deadline from a start date using calendar days, full weeks, or business days. Useful for proposals, approvals, internal reviews, and delivery planning.
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
Choose a start date, select the unit and amount, then calculate the target date.
Practical uses
Estimate a deadline from a start date using calendar days, full weeks, or business days. Useful for proposals, approvals, internal reviews, and delivery planning.
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
Can I calculate business-day deadlines?
Yes. Choose the business days option to skip weekends.
Should legal deadlines use this tool?
Use it for planning, but always confirm legal or contractual rules with the official source.