90 Day Calculator
Perfect for quarter planning, probation periods, visa tracking, and 90-day transformation programs.
Start date: Wednesday, November 26, 2025
90 days later: Tuesday, February 24, 2026
Time span: 90 days ≈ 12.9 weeks ≈ 2.96 months
Days relative to today: 90 day(s) remaining
How to Use This Calculator
Enter the reference date
Select the day your 90-day period starts or ends.
Pick direction
Plan ahead 90 days or review 90 days of history.
Schedule milestones
Add the target date to dashboards, team calendars, or accountability trackers.
Formula
Target Date = Start Date ± 90 days
Weeks ≈ 90 ÷ 7
Months ≈ 90 ÷ 30.4375
Example: Start 2025-11-09 → 90 days later is 2026-02-07 (Saturday).
Quarterly Planning Ideas
- Structure business OKRs and 90-day sprints.
- Track probation or trial employment periods.
- Plan visa-free travel (many countries allow 90-day stays).
- Run 90-day health, budgeting, or skill development programs.
Frequently Asked Questions
Is 90 days exactly a quarter?
A quarter is roughly 91–92 days, but businesses often use 90-day cycles for simplicity.
How do I include the start day?
This calculation includes the starting date. If you need exclusive counts, adjust manually by one day.
Can I include elapsed time in hours?
This tool focuses on days. For time-of-day precision, use the Add Time Calculator with hourly inputs.
Does it handle leap years?
Yes—the date math respects calendar rules, including leap days when encountered.