Days Calculator
Count the days between two dates, including or excluding the end date.
A focused day counter for planning events, notices and deadlines.
Google AdSense Reserved Space
Input Parameters
Jan 10, 2024 is 10 day(s) after Jan 1, 2024 (inclusive).
Google AdSense Reserved Space
Calculation Formula & Methodology
All arithmetic is processed locally in your browser session using IEEE 754 precision with boundary checks.
Worked example
Google AdSense Reserved Space
Frequently Asked Questions
When should I use the Days Calculator?
Count the days between two dates, including or excluding the end date. Always read the formula and assumptions on the page before relying on a figure.
Are the results official?
No. OmniCalc runs the math in your browser from the inputs you provide. Laws, lender policies and medical guidance are not applied automatically.
Google AdSense Reserved Space
Related Calculators
More in Age and Date →Date Difference Calculator
Measure the gap between two dates in years, months, weeks and days.
Working Days Calculator
Count Monday–Friday days and optionally skip listed holidays.
Age Calculator
Find exact age in years, months and days from a date of birth.
Add Days to Date
Add or subtract a number of days from a starting date.
Birthday Countdown
See how many days remain until the next birthday.
Leap Year Calculator
Test whether a year has 29 February under Gregorian rules.