Add Days Calculator
Add days to any date or calculate days between two dates. Perfect for planning events, deadlines, and time tracking.
Calculate Dates and Days
Starting date for calculation
Number of days to add to the from date
Example Calculations
Project Deadline Planning
Scenario: You have a project that needs 45 working days starting January 1st.
Calculation: Add 45 working days to January 1, 2024
Result: Approximately March 5, 2024 (excluding weekends)
Event Duration Calculation
Scenario: Count days from June 1st to August 31st including end date.
Calculation: June (30) + July (31) + August (31) = 92 days
Result: 92 days total including August 31st
Add Days Tips
Use "Include end date" for event duration calculations
Working days exclude Saturdays and Sundays
Perfect for project planning and deadline tracking
Switch modes to add days or count between dates
Common Use Cases
Project Management
Calculate project deadlines and delivery dates
Event Planning
Determine event duration and preparation time
Business Planning
Working days for business process timing
Travel Planning
Calculate trip duration and return dates
Legal & Financial
Contract terms and payment due dates
Understanding Date Addition
Calendar Days vs Working Days
Calendar days include all days of the week, while working days exclude weekends (Saturday and Sunday). Choose working days for business-related calculations and calendar days for general time periods.
Include End Date Option
When disabled (default), the calculator counts the days you need to live through to reach the end date. When enabled, it includes the end date in the total count, useful for event duration calculations.
Calculation Modes
Add Days Mode
Start with a date and add a specific number of days to find the resulting date. Perfect for deadline calculations and future planning.
Count Days Mode
Calculate the number of days between two specific dates. Ideal for measuring event duration and time spans.