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Date Add Calculator
Add or subtract days, weeks, months, and years from a date.
About this date add calculator
Calculate future or past dates for deadlines, schedules, renewals, timelines, and planning.
Mavis Tools is built for quick utility work: paste the input, get the result, and move on. The page is static-first for speed, and the interactive work happens in your browser. That makes it useful for drafts, calculations, debugging snippets, and repeat everyday tasks.
This tool is intentionally focused. It does one job clearly instead of asking for an account or hiding the result behind a long workflow. Bookmark it if you need a fast date calculator that works on desktop and mobile.
FAQ
Can it subtract dates?
Yes. Use negative values to subtract.
Does it handle months?
Yes. It uses browser date arithmetic for months and years.
Is data uploaded?
Yes. The tool runs in your browser, and the input is not uploaded to a server.