Month Calculator

The Month Calculator tells you exactly how many months, and days, fall between two dates. It's completely free and needs no sign-up, so anyone can use it right away in the browser. It's handy for tracking project timelines, calculating age in months, or figuring out how long until a deadline or anniversary.

What is Month Calculator?

This tool measures the span between a start date and an end date and converts it into a whole number of months plus any leftover days. Because calendar months vary in length from 28 to 31 days, the calculator accounts for actual month boundaries rather than assuming a flat 30-day month, so results stay accurate across February or long spans crossing several years. You can use it for past date ranges or to plan ahead to a future date.

How to use Month Calculator

1. Select or type your start date.
2. Select or type your end date.
3. Instantly see the number of months and days between the two dates.

Key features

• Calculates the exact months and days between any two dates
• Accounts for varying month lengths and leap years automatically
• Works for both past date ranges and future planning
• Free, fast, and requires no account or download

Related tools

Count exact days with the Days Calculator, find someone's age using the Age Calculator, or work in smaller units with the Hours Calculator.

Frequently asked questions

Is Month Calculator free?

Yes, the Month Calculator is entirely free and doesn't require any sign-up. You can calculate as many date ranges as you need without limits.

Does it account for leap years?

Yes, the calculator accounts for leap years automatically when counting the days between dates. This keeps results accurate even when your date range includes February 29th.

Can I calculate months into the future?

Yes, you can set your end date to any point in the future to see how many months remain until that date. This is useful for planning deadlines, due dates, or countdown-style goals.

How is this different from a days calculator?

A month calculator expresses the gap between dates primarily in whole months plus remaining days, which is easier to read for longer spans. A days-only calculator instead gives you the total day count, which is more useful for short-term scheduling.