⚙️Days Calculator

This day number calculator is a tool that helps you calculate the number of days between 2 dates, and calculate the date by adding or subtracting days to a specific date.

So, it helps, if you want to know the exact number of days between two dates, add days to a specific date, or subtract days from a date. Therefore, to calculate date or days, select calculation type and enter value according to the the calculation, and click the calculate button.

Select dates to calculate

How to Use Days Calculator?

  1. First, you need to select the operation type (Days Between, Add Days, or Subtract Days)
  2. For "Days Between": Enter both start and end dates
  3. For "Add Days" or "Subtract Days": Enter start date and number of days
  4. Click Calculate to see the result

Days Calculation

Days Between Dates:

Days = (End Date - Start Date) / (24 hours × 60 minutes × 60 seconds × 1000 milliseconds)

Example: December 12, 2024 to December 15, 2024

= (December 15, 2024 - December 12, 2024) / (86400000 milliseconds)

= 3 days

Add/Subtract Days:

Result Date = Start Date ± (Number of Days × 24 hours × 60 minutes × 60 seconds)

Frequently Asked Questions

We've also included leap year calculations in its calculations, so you'll get accurate results every time.

In this calculator, we uses the ISO date format (YYYY-MM-DD) for input, but displays results in a staandard format (Month DD, YYYY).

Yes, all days (including weekends and holidays) are included in the calculation. For business days, please use our Business Days Calculator.

We have set the limit for accuracy, the calculator can handle dates from January 1, 1970, to December 31, 2099. So, in this range you can use this calculator, which is sufficient for your any task..

Related Calculators

📅 Days from Today Calculator ➜ ⏰ Business Days Calculator ➜ 🗓️ Age Calculator ➜ ⌚ Time Duration Calculator ➜