Converting Months to Days
When you need to know exact day counts from monthly periods, this conversion is essential. Billing cycles, rental agreements, and project milestones often require day-level precision.
Since months vary in length, this converter uses the Gregorian calendar average: 1 month ≈ 30.44 days.
Why Convert Months to Days?
- Billing accuracy - Prorate charges by exact days
- Contract terms - Understand "3-month" periods in days
- Pregnancy tracking - Monthly milestones in days
- Software trials - "1-month free" actual duration
- Travel planning - Visa months converted to trip days
Quick Reference
| Months | Days (approx) |
|---|---|
| 1 | 30.44 |
| 2 | 60.88 |
| 3 | 91.31 |
| 6 | 182.63 |
| 9 | 273.94 |
| 12 | 365.25 |
How to Convert Months to Days
Simple Steps
- Enter months (whole or decimal)
- See days calculated instantly
- Use for billing or planning purposes
The Formula
Days = Months × 30.4375
(Based on 365.25 days ÷ 12 months)
Examples
- 3 months: 3 × 30.44 = 91.31 days
- 6 months: 6 × 30.44 = 182.63 days
- 1.5 months: 1.5 × 30.44 = 45.66 days
Specific Month Lengths
For exact calculations by calendar month:
- January, March, May, July, August, October, December: 31 days
- April, June, September, November: 30 days
- February: 28 days (29 in leap years)
Features
Precise Average
Uses the Gregorian calendar average (30.4375 days/month) for consistent, accurate results across any period.
Real-Time Results
Days appear instantly as you type - no waiting or button clicking.
Swap Direction
Quickly convert days back to months with one click.
Copy Function
Copy results directly for use in invoices, contracts, or scheduling tools.
Reference Table
Common conversions displayed for quick verification.
Works Everywhere
- Accounting - Billing calculations
- Legal - Contract terms
- Healthcare - Treatment durations
Frequently Asked Questions
How many days is 1 month exactly?
It varies by month (28-31 days), but the average is 30.44 days. For billing, 30 days is commonly used as a standard month.
How many days in 3 months?
Using the average: 3 months ≈ 91 days. Actual days depend on which specific months are involved.
Why is one month not exactly 30 days?
Our calendar months vary to align with the solar year (365.25 days). Ancient Romans created months of different lengths, a system we still use today.
How do I calculate for a specific month?
Use the actual day count: January = 31, February = 28/29, etc. This tool uses averages for general planning.
Is 4 weeks the same as 1 month?
No. 4 weeks = 28 days, but most months have 30-31 days. Only February in non-leap years equals exactly 4 weeks.
How many days in half a month?
Using the average: 0.5 months = approximately 15 days.
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