About this date difference calculator
Calculate the difference between two calendar dates.
How to use it
Enter the values requested by the calculator. Results update in your browser as you change the inputs. Review the assumptions shown on the calculator before using the result.
Formula
date difference = end date − start date
Example
Use this to count elapsed time between two dates without manually counting calendar days.
Frequently asked questions
What does the date difference calculator show?
Calculate the difference between two calendar dates.
Are the results exact?
The result is calculated from the inputs and assumptions shown on this page. For important financial, health, tax, or legal decisions, verify the result with an appropriate professional or authoritative source.