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Months between Dates Calculator
Calculate the exact number of months between any two dates
Calculate Months Between Dates
Starting date for the calculation
Ending date for the calculation
By default, the end date is not included in the calculation
Quick Examples:
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Common Time Periods
Quarter3 months
Half Year6 months
Full Year12 months
Leap Year12.03 avg months
How We Define a Month
•
Average month = 30.4375 days (365.25 ÷ 12)
•
2,629,800 seconds per average month
•
Accounts for leap years (365.25 days/year)
•
More accurate than calendar months alone
•
Standard for financial and scientific calculations
Understanding Months Between Dates
What is a Month?
The word "month" comes from "moon" and originally represented the time between new moons. Today, we use artificial calendars with varying days per month, making accurate calculations complex.
Average Month Definition
- •Based on 365.25 days per year (including leap years)
- •Average month = 30.4375 days
- •More accurate for time calculations
- •Used in financial and scientific contexts
Calculation Method
Step 1: Count Days
Calculate the number of days between start and end dates.
Step 2: Convert to Seconds
Multiply days by 86,400 seconds per day.
Step 3: Divide by Month Length
Divide by 2,629,800 seconds per average month.
Example: Jan 1, 2022 to Jun 29, 2022
Calculation Steps
- Period: 179 days (not including end date)
- Seconds: 179 × 86,400 = 15,465,600 seconds
- Months: 15,465,600 ÷ 2,629,800 = 5.88 months
Alternative Units
- Weeks: 25.6 weeks
- Hours: 4,296 hours
- Minutes: 257,760 minutes
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