Calculate days between dates.
DifferenceOpen
Weeks Between Dates Calculator
Quick answer
If start date is 1 Jan 2026 and end date is 15 Mar 2026, the answer is 10.43 weeks.
Enter your values
Weeks
10.43weeks
The length of time this runs for, in weeks.
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About the Weeks Between Dates Calculator
This calculator converts the gap between two dates into weeks — useful for pregnancy tracking, project plans, courses and training schedules. It divides the number of days by 7, so the answer can include a fraction.
For example, 73 days is about 10.4 weeks, or 10 weeks and 3 days.
Things to keep in mind
- Multiply the decimal part by 7 to get the extra days: 0.43 × 7 ≈ 3 days.
- The end date is not counted; add 1 day if you want to include it.
- For exact day counts, use the Days Between Dates calculator.
DATE & TIME GUIDE
A quick guide to Weeks Between Dates
Use it to get an accurate weeks in seconds — free, with no sign-up.
Instant results
See your weeks the moment you enter your numbers.
Free, no sign-up
Every calculator here is free to use, with no account required.
Accurate & transparent
The same standard formula runs on our server for every calculation.
How to Use the Weeks Between Dates Calculator
1
Pick Start date
Provide your start date.
2
Pick End date
Provide your end date.
3
View Your Results
Get your weeks instantly, calculated on our server.
What is Weeks Between Dates?
This date & time tool works out your weeks instantly, so you don't have to do the math by hand.
“One quick calculation, so you always know your weeks before you decide.”
What Affects Your Weeks
Your weeks depends on the values below.
Start date
Changing your start date changes your weeks.
End date
Changing your end date changes your weeks.
Example Result
Here's what you can expect from a weeks between dates calculation:
- Weeks
- 16.86 weeks
Frequently Asked Questions
- How to calculate weeks between dates?
- Fill in start date and end date in the Weeks Between Dates Calculator above and your weeks is calculated instantly. Change any value to see how the result responds.
- What does an example weeks between dates calculation look like?
- If start date is 1 Jan 2026 and end date is 15 Mar 2026, the answer is 10.43 weeks.
- Is this calculator free to use?
- Yes — every calculator on this site is completely free, with no sign-up or account required.
- How accurate is this calculator?
- It uses the standard formula and calculates on our server for every request, so results are precise for the values you enter.
- Is my data saved anywhere?
- No. Nothing you enter is stored or sent anywhere unless you choose to share a link with your values included.
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