Months From Now Calculator
Add or subtract whole calendar months from today. End-of-month dates clamp to the last day of the target month (for example January 31 + 1 month → February 28 or 29).
Quick links
How month arithmetic works
Months are not equal length: February is shorter, and others have 30 or 31 days. When you add months in JavaScript with setMonth, the engine keeps the same day of month when it can. If that day does not exist in the target month, the date rolls back to the last valid day — so January 31 plus one month becomes February 28 (or 29 in a leap year), not March 2 or March 3.
Common uses
- Leases and rentals — renewals tied to the same calendar day each month.
- Subscriptions — billing cycles that follow calendar months.
- Planning — milestones stated as “in six months” without picking a fixed day count.
- Due dates — contexts like pregnancy timelines often use months as a rough guide; always confirm medically.
Frequently asked questions
What happens if I add one month to January 31?
JavaScript normalizes to the last day of February (28 or 29), because February 31 is invalid.
Are these whole calendar months?
Yes. The tool uses setMonth on a calendar date, not a fixed 30-day interval.
Is data sent to your servers?
No. Everything runs locally in the browser.