Date and Time Calculations
Three of the most commonly searched date and time calculation questions — answered clearly.
Use the interactive calculators →Is 4 Weeks Equal to 30 Days?
No. 4 weeks = 28 days (4 × 7 = 28). 30 days is 2 days more than 4 weeks.- 1 week = exactly 7 days. Always.
- 4 weeks = 28 days. Not 30.
- 1 month ≠ 4 weeks. Months have 28, 29, 30, or 31 days.
- February is the only month that can equal exactly 4 weeks (28 days in a common year).
- 30 days = 4 weeks and 2 days.
- 31 days = 4 weeks and 3 days.
- 1 year = 52 weeks and 1 day (or 2 days in a leap year).
Hours to Minutes Formula
Minutes = Hours × 60- To convert hours to minutes: multiply by 60.
- To convert minutes to hours: divide by 60.
- To convert minutes to seconds: multiply by 60.
- 1 hour = 60 minutes = 3,600 seconds.
- 1 day = 24 hours = 1,440 minutes = 86,400 seconds.
- 1 week = 168 hours = 10,080 minutes = 604,800 seconds.
Quick Reference
| Hours | Minutes | Seconds |
|---|---|---|
| 0.5 | 30 | 1,800 |
| 1 | 60 | 3,600 |
| 1.5 | 90 | 5,400 |
| 2 | 120 | 7,200 |
| 8 | 480 | 28,800 |
| 24 | 1,440 | 86,400 |
How to Find the Halfway Point Between Two Dates
The midpoint date is found by adding the timestamps of both dates together and dividing by 2.
Formula: Midpoint = Start + (End − Start) ÷ 2In plain terms: count the total days between the two dates, divide by 2, and add that many days to the start date.
Example: Halfway between January 1 and January 31 = January 16 (15 days from each end).