📖 Overview
Estimate available working hours for project planning sprint sizing and deadline management.
⚙️ How It Works
Estimates available working hours before a deadline by converting calendar days to working days (using your weekly schedule) and multiplying by daily hours.
The Formula
Working Days = floor(Calendar Days × Working Days/Week ÷ 7) | Working Hours = Working Days × Hours/Day
| Calendar Days | Total days until the deadline from today |
| Working Days/Week | Your typical work days per week (e.g., 5 for Mon–Fri) |
| ÷ 7 | Converts weekly rate to a per-day proportion |
| Hours/Day | Productive hours per working day |
💡This formula gives a practical estimate but does not account for public holidays. If your deadline spans a holiday week, subtract those days from your calendar days input.
Quick Reference
| Calendar days | 5-day week × 8h | 5-day week × 6h | 4-day week × 8h |
|---|---|---|---|
| 7 days | 40 h | 30 h | 32 h |
| 14 days | 80 h | 60 h | 64 h |
| 30 days | 171 h | 129 h | 137 h |
| 90 days | 514 h | 386 h | 411 h |
Practical Tips
💡 Use this during sprint planning to verify a deadline is achievable given team capacity.
💡 Subtract planned leave, public holidays, and meeting-heavy days for a realistic figure.
💡 Hours/day = 6 is often more realistic than 8 once meetings, email, and breaks are accounted for.
Frequently Asked Questions
❓ Does this account for weekends?
Yes — the formula scales calendar days by your working days per week fraction, effectively excluding non-working days.
❓ What if I work weekends?
Set working days/week to 7 and the calculator will treat every day as a working day.