Month Calculator

Find the exact number of months between any two dates — fast and accurate.

Tool Icon Month Calculator

Month Calculator

Calculate the precise number of months between any two dates

Select Duration Dates
Enter the start and end dates to find the difference
Quick Date Presets:
Calculation History:
No calculation history yet
Calculation Use Cases:
Age Calculation

Determine age in months for infants or milestones.

Contract Tenure

Calculate total months for leases or agreements.

Project Roadmap

Plan durations for multi-month project phases.

Interest Periods

Calculate time for financial compound periods.

Historical Gaps

Measure time between historical events.

Academic Terms

Track semester lengths or study periods.

How to Use:
  1. Select your Start Date and End Date using the calendar inputs.
  2. Optionally click "Show Quick Presets" for common timeframe shortcuts.
  3. Select your preferred calculation mode (Exact or Rounded).
  4. Click "Calculate Months" to generate the breakdown and summary.

What’s This Month Calculator Thing?

So you need to figure out how many months are between two dates—maybe for a project timeline, loan payments, or just to settle a bet with a friend. Instead of counting on your fingers and getting confused by leap years, you’ve got this handy little tool. The Month Calculator does exactly what it says: it counts the months between any two dates you throw at it. No fluff, no overcomplicated steps. Just pick a start date, pick an end date, and boom—you get the number of months in between. It’s not magic. It’s just smart math. And honestly? It saves you from making dumb mistakes when you’re doing mental math at 2 a.m.

What Can It Actually Do?

  • Calculate the number of full months between two dates—no guesswork.
  • Handle leap years without breaking a sweat (February actually matters here).
  • Work forward or backward—figure out what month it’ll be 18 months from now or what it was 5 years ago.
  • Give you partial months if you need precision (like 6.5 months, not just “6”).
  • Be used for totally random stuff—rental periods, subscription lengths, pregnancy countdowns, you name it.

Common Questions (Because I Know You’re Wondering)

Q: Does it count the starting month?
A: Nope. It counts full months between the dates. So if you go from January 15 to March 15, that’s 2 months—not 3. Think of it like birthdays: you don’t count the day you’re born as your first birthday.

Q: What if the end date is earlier than the start date?
A: It’ll still work—just gives you a negative number. So if you pick March 10 and then January 5, it’ll say “-2 months.” That just means you’re going backward in time. Handy if you’re double-checking past deadlines.