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A quick way to understand who this helps, what it solves, and where it connects next.
Anyone counting days between two dates.
Using the days between dates without installing anything or signing up.
Capture days-between-dates intent with a fast, browser-side tool that runs 100% locally.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
The Days Between Dates calculator finds the exact gap between two dates. Pick a start and end date to see the total days, total weeks, hours, and minutes, plus a calendar-accurate years, months, and days breakdown. A toggle lets you include the end date when you need both endpoints counted, which is handy for billing periods and trips. A second mode adds or subtracts a number of days from any date and shows the resulting date and its weekday. All calculations use UTC and run in your browser, so nothing is uploaded.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is free with no signup, and every calculation runs in your browser, so your dates are never uploaded.
Yes. Switch to the add/subtract mode, enter a date and a number of days, and the tool shows the resulting date and its day of the week.
By default the gap counts the days between the two dates, so the end date itself is not counted. Turning on include the end date adds one day so both the start and end are counted, which matches how you would count a full inclusive range.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Pick two dates to see the gap in days, weeks, and a years / months / days breakdown, or switch to add or subtract days from a date. Everything runs in your browser.
Pick a valid start and end date to see the gap.