Date Difference Calculator
Count the days, weeks and months between two dates, including an estimate of business days. Free, nothing is uploaded.
Scan to open on your phone
Point your phone camera at the code to open this tool.
Count the days, weeks and months between two dates, including an estimate of business days. Free, nothing is uploaded.
How to use Date Difference Calculator
- Open the toolNo signup and nothing to install; it works as soon as the page loads.
- Set “Start date”
- Set “End date”
- Read the resultChange any input and the result is recalculated immediately.
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Date Difference Calculator only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- How are business days estimated?
- The total day count is converted to weeks and multiplied by five, which ignores public holidays.
- Does it count the end date?
- No. It measures the gap between the two dates, so the same date gives zero.