In 1 seconds there are 3.85802e-7 months. Meanwhile in 1 months there are 2,592,000 seconds. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Months to Seconds calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert seconds to months, you need a month length. Months don’t all have the same number of days, so your result depends on what you choose.
Common choices
Step-by-step (recommended average month)
Combined formula:
Simple estimate (30-day month)
Tip for cleaner results
Using the right seconds-to-months conversion method keeps time totals clear, especially for payroll, billing cycles, and long time spans.
A month doesn’t have one fixed number of seconds. Months range from 28 to 31 days. Multiply days by 86,400 seconds per day.
Common month lengths in seconds:
Months aren’t all the same length. Some have 30 days, some have 31, and February has 28 or 29. That’s why the same number of seconds can equal a different number of months, based on the dates you use.
Use actual dates. Add the seconds to a start date and see how many full calendar months pass. This method matches real schedules like billing cycles, contracts, and due dates.
An average month is often based on the average year length. One common average is:
To convert:
It depends on the month length you choose.
Approx values:
It depends on which two months you mean.
Examples:
No. Some quick estimates treat a month as 30 days, but that’s only an estimate. For accurate results, use the real calendar month length or an average month value.
Use calendar months based on start and end dates. Payroll and billing often depend on month boundaries, not fixed day counts. This avoids mismatches when months have different lengths.
Leap years add a day to February, changing it from 28 to 29 days. That adds 86,400 seconds. Any conversion that includes February can change because of that extra day.
Only if you accept an estimate. Without a start date, you can’t know which months are included. Use either:
This depends on the month length and how you define “half.”
Examples:
Use one of these, based on your goal:
Avoid it when the exact month matters. Use real dates for:
The Calculate Box tool to convert seconds to months uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a seconds value in the box and have it instantly converted to months.