Date Add / Subtract Calculator
Add days to a date or subtract them to find a past date. See what date it is 30, 90 or any number of days from today or from any start date.
Formula
Result = start date + number of days
Use it from the API
curl "https://moltcalc.com/api/calc/date-add?start=2026-07-27&days=90"
See the API docs for every endpoint and the input schema.
FAQ
How do I find the date 90 days from today?+
Leave the start date blank (it defaults to today), enter 90 in the days field, and the calculator adds exactly 90 calendar days and shows the resulting date.
Can I subtract days from a date?+
Yes. Enter a negative number of days, like -30, and the calculator counts backwards from the start date instead of forwards.
Are weekends and holidays skipped?+
No, the calculator counts every calendar day, including weekends and holidays. Business day calculations would give a later result for the same number of days.
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