Day Counter Calculator Between Dates
Day Counter
Count Days Between Two Dates
Sunday, Sunday, February 15, 2026
Sunday, Sunday, February 15, 2026
Total Duration:
days
Weekdays
0
Monday - Friday
Weekend Days
0
Saturday & Sunday
Understanding Day Counting
What is Day Counting?
Day counting calculates the exact number of days between two dates. This is essential for project deadlines, birthday countdowns, pregnancy tracking, loan calculations, and measuring time spans for any purpose.
Including the End Day
When "Include end day" is checked, both the start and end dates count as full days. For example, from Monday to Friday with end day included equals 5 days. Without it, only 4 days are counted (Monday through Thursday).
Weekdays vs Weekends
The calculator automatically separates weekdays (Monday-Friday) from weekends (Saturday-Sunday). This is valuable for calculating business days, work schedules, and project timelines that exclude non-working days.
Common Use Cases
Project Management
- Calculate project duration and deadlines
- Track days remaining until milestones
- Estimate working days for task completion
- Plan sprint lengths and delivery dates
Personal Events
- Countdown to birthdays and anniversaries
- Track pregnancy by weeks and days
- Calculate vacation days and time off
- Measure age in days since birth
Financial Calculations
- Calculate loan interest periods
- Determine billing cycles
- Track payment due dates
- Calculate prorated amounts
Business Days Calculation
What are Business Days?
Business days refer to Monday through Friday, excluding weekends. Many companies and institutions use business days for shipping estimates, processing times, and deadline calculations.
How It Works
When "Count business days only" is enabled, the calculator skips Saturdays and Sundays. For example, adding 5 business days to a Friday results in the following Friday (skipping the weekend days).
Example: If you order something on Monday with "3 business day shipping," it arrives on Thursday. Starting on Thursday means delivery on Tuesday (skipping weekend).
Days of the Week
Understanding Day Names
Each date falls on a specific day of the week. The calculator displays the day name for your selected dates, helping you plan around specific days like meetings that only occur on Tuesdays or events scheduled for weekends.
Weekly Patterns
Days repeat in a 7-day cycle. This means adding or subtracting multiples of 7 days results in the same day of the week. For instance, 14 days from any Tuesday is always another Tuesday.
Weekend days shown in red
Tips for Accurate Calculations
✓ Best Practices
- • Always verify your date format is correct
- • Use "Include end day" for deadlines at end of day
- • Enable business days for work-related calculations
- • Double-check month lengths (28-31 days)
- • Consider leap years for February dates
✓ Common Scenarios
- • Pregnancy: Typically 280 days (40 weeks)
- • Standard work week: 5 business days
- • Typical billing cycle: 30 days
- • Quarter year: Approximately 91 days
- • Half year: Approximately 182-183 days