Month Calculator
Calculate the number of months between two dates or add and subtract months from any starting date. Instantly review the exact date span and calendar result.
Find months between dates or shift a date forward or backward.
Select the starting date, ending date, or number of months.
See complete months, remaining days, and the final calendar date.
The calculator counts complete calendar months first, then measures any remaining days. When adding or subtracting months, it preserves the day where possible and adjusts safely for shorter months.
A month calculator is useful for subscription terms, lease periods, project timelines, pregnancy planning, loan schedules, employee service periods, contract dates, and general calendar planning.
Months have different lengths. This calculator uses calendar-month logic rather than treating every month as exactly 30 days, so results can include both full months and remaining days.
How are complete months calculated?
The calculator advances from the start date month by month without passing the end date, then counts any remaining days.
What happens when adding months to January 31?
If the destination month has fewer days, the result is adjusted to the final valid day of that month.
Does the calculator include the starting day?
The total day difference follows standard date subtraction, where the start day itself is not counted as a full elapsed day.
Results are estimates generated locally in your browser using standard calendar and time-zone assumptions. They are for informational purposes only. Confirm exact dates and times against official sources for anything time-critical. VisionVix accepts no liability for decisions based on this tool's output.
This calculator is intended for general planning and date comparison. Confirm important legal, financial, employment, or contractual deadlines with the original documents.
