Days Calculator
This is free online days calculator to find days between dates, add or subtract days.
Days Between Dates
Add Days
Subtract Days
Start Date
End Date
How to Use This Calculator
- Choose your calculation type from the options above (Between Dates, Add Days, or Subtract Days)
- For Between Dates: Select your start and end dates to find the number of days between them
- For Add Days: Choose a start date and enter the number of days you want to add
- For Subtract Days: Select a date and enter the number of days to subtract
- Click the calculate button to see your results instantly
Days Calculation
Between Dates:
Days = End Date - Start Date
Add Days:
Result Date = Start Date + (Days)
Subtract Days:
Result Date = Start Date - (Days)
All calculations account for:
- Leap years (366 days)
- Regular years (365 days)
- Varying month lengths
- Partial days (with decimal points)
Frequently Asked Questions
How accurate is the days calculator?
Our days calculator provides accurate calculations by calculating leap years, varying month lengths.
However, the result will be in rounded to one decimal place for accuracy.
Can I use this for project planning?
You can use this calculator for project planning. However, for critical projects,
always consult with your project manager as they may use specific project management standards
for days calculations.
How are days calculated between dates?
The calculator takes the difference between two dates in days.
It also calculate leap years and varying month lengths. The result includes partial days
for more correct results.
Why do I see decimal points in the results?
Decimal points in the results are th partial days. For example, 3.5 days means three
and a half days. This provides more accurate results than rounding to whole days.
