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A quick way to understand who this helps, what it solves, and where it connects next.
Anyone adding, subtracting, or measuring time.
Using the time calculator without installing anything or signing up.
Capture time-calculator 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 time calculator works in two modes. In add/subtract mode you start from a base date and time and shift it forward or back by any combination of days, hours, minutes and seconds. In duration mode you enter a start and end time and get the exact span between them, broken into days, hours, minutes and seconds plus handy running totals. All arithmetic runs locally in your browser and results can be copied with one click, with nothing uploaded.
Short answers for the questions people usually have before trying a utility like this.
Yes. Switch to duration mode, enter a start and end date and time, and it shows the exact gap in days, hours, minutes and seconds, along with total hours, minutes and seconds.
Yes. In add/subtract mode choose the Subtract operation to shift a base time backward by any number of days, hours, minutes and seconds.
No. Every calculation happens locally in your browser tab. No times are sent to a server.
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.
Add or subtract durations, or measure the gap between two times. Nothing is uploaded.
All math runs locally in your browser tab.
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