In 1 months there are 2,592,000 seconds. Meanwhile in 1 seconds there are 3.85802e-7 months. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Seconds to Months calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert months to seconds, start by picking the right month length for your use.
Formula (average):
seconds = months × 2,629,800
Example:
If you need exact results for a real calendar month, convert by days in that month:
A month doesn’t have a fixed number of seconds because months have different lengths. Most months have 30 or 31 days, and February has 28 days (29 in a leap year). To convert months to seconds, you must pick a month length or use an average month.
Use this general formula:
Seconds = months × days-per-month × 24 × 60 × 60
Pick the days-per-month value that fits your case, like 30, 31, 28, or 29.
A 30-day month has: 30 × 24 × 60 × 60 = 2,592,000 seconds
A 31-day month has: 31 × 24 × 60 × 60 = 2,678,400 seconds
February can have two different totals:
An average month is often based on a 365-day year: 365 days ÷ 12 = 30.4167 days (about)
Seconds in an average month: 30.4167 × 24 × 60 × 60 ≈ 2,629,800 seconds
This works well for long time spans, like budgets or interest estimates.
Months vary in length. That’s the main reason. Leap years also change the number of days in a year, which affects averages.
Use 30 or 31 days when you mean a real calendar month. Use an average month when you’re working across many months and need a steady estimate.
It depends on the month length:
Multiply by the month length you want:
Here are common estimates:
Twelve months can mean different things:
Not exactly. A “month” isn’t a fixed unit in seconds. You can only convert months to seconds if you define the month as a set number of days or use an average.
It can, but only for exact calendar timekeeping in places that use daylight saving time. One day can be 23 or 25 hours during the switch. For most math and planning, people use 24 hours per day.
The most accurate method is to use real calendar dates. Count the exact days between the start and end date, then convert days to seconds using 24 × 60 × 60. This matches how months actually pass on a calendar.
The Calculate Box tool to convert months to seconds uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a months value in the box and have it instantly converted to seconds.