Date Difference Calculator
Count days, weeks, months, and years between two dates.
Widget gallery
Free calculator widgets for your website
Browse every free Calcadian calculator widget you can embed on your site, date difference, working days, time card, age and more. Copy the iframe, keep the small attribution link.
All embeddable calculators
Add or Subtract Days Calculator
Find a future or past date by adding or subtracting time.
Business Days Calculator
Count working days between two dates, excluding weekends.
Age Calculator
Calculate exact age from any date of birth.
Time Duration Calculator
Calculate hours and minutes between two times.
Weekly Time Card Calculator
Add up a full week of shifts with breaks and overtime.
Week Number Calculator
Find the ISO week number for any date.
Days Until Calculator
Count how many days are left until any future date.
Time Since Calculator
See how long ago a past date was, in years, months, and days.
Weeks Between Dates Calculator
Calculate total weeks, remaining days, and decimal weeks between two dates.
Day of the Week Calculator
Find what day of the week any date falls on.
Unix Timestamp Converter
Convert between Unix epoch time and readable dates.
Business Date Calculator
Add or subtract business days to find the resulting workday.
Date & Time Difference Calculator
Measure elapsed time between two full date and time values.
Hours and Minutes Calculator
Add or subtract durations without base-60 arithmetic.
Decimal Hours Calculator
Convert between hours and minutes and decimal hours.
Time From Now Calculator
Find the local date and time a set duration from now.
Months Between Dates Calculator
Count whole calendar months and the days left over.
Shift Calculator
Work out the hours in one shift, breaks included.
Age Difference Calculator
Compare two birth dates to find the exact age gap.
Time Until Calculator
Count down to a future date and clock time.
Time Zone Converter
Convert times between cities and plan meetings.
Who uses these
HR and payroll teams, school and university calendar pages, project management blogs, and internal intranets.
What it costs
The simple embed is free for every calculator. No account, no API key, no tracking pixels injected into your page. Saved, customisable and white-label widgets for licensed domains come with the Pro and Business plans.
How to credit us
Keep the attribution line under the iframe: the calculator name plus a link to Calcadian. That is the whole licence.
Used a Calcadian widget?
Tell us where you use it. We may feature useful examples after an editorial review. A link to Calcadian isn't required and doesn't guarantee inclusion. Get in touch.