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Weeks Until Calculator (Weeks Between Dates)
Pick a date below and you will see the weeks left from today, then the spare days, then a decimal. October 9 to November 26 is 48 days. That works out to 6 weeks and 6 days, or 6.9 weeks.
People use it for a due date, a holiday trip or the last day of school. Fill in the From box too and it counts the weeks between two dates instead of starting today. Countdowns that are already set up, such as Christmas, sit on the weeks until pages.
Quick answer: Count the days from today to the target, leave today out, and divide by 7. The whole number is the weeks and what is left over is days. A gap of 137 days is 19 weeks and 4 days, or about 19.6 weeks. Two dates that do not include today work the same way, so put the first one in the From box.
The days until calculator gives the same gap in days. Weeks left in the year always runs to December 31, and the weeks from today pages show the date 6 or 12 weeks out.
How weeks until a date are counted
The calculator counts the midnights between the start and the target date. The start is today unless you fill in From, and the start day itself is left out. It then splits that number into groups of 7. Twenty days becomes 2 weeks and 6 days. A target of today gives 0. A date in the past is labeled as passed. Holiday presets always point to the next one ahead.
Worked example: a trip in late May
Picture planning on Monday, January 5, 2026, for a trip that starts on Friday, May 22, 2026. You want to know how many paychecks or study weeks fit in before you leave.
January 5 is day 5 of the year. May 1 is day 121, so May 22 is day 142. Taking 5 from 142 leaves 137 days between the two dates.
Seven goes into 137 nineteen times, which uses up 133 days. Four days are left over. As a decimal, 137 ÷ 7 is about 19.57 weeks.
To check it above, set From to January 5, 2026 and the target to May 22, 2026.
Result: 19 weeks and 4 days (about 19.6 weeks).
Weeks between two dates
Put the earlier date in the From box and the later one as the target, and the calculator counts the weeks between them. By hand, take the earlier date from the later one to get the days, then divide by 7. The days between dates calculator accepts any start date and shows the span in weeks too.
| From | To | Days | Weeks and days | Decimal weeks |
|---|---|---|---|---|
| January 1, 2026 | June 30, 2026 | 180 | 25 weeks 5 days | 25.71 |
| January 1, 2026 | December 31, 2026 | 364 | 52 weeks | 52.00 |
| March 1, 2026 | November 26, 2026 | 270 | 38 weeks 4 days | 38.57 |
| June 1, 2026 | August 31, 2026 | 91 | 13 weeks | 13.00 |
| September 1, 2026 | December 25, 2026 | 115 | 16 weeks 3 days | 16.43 |
| November 1, 2026 | January 1, 2027 | 61 | 8 weeks 5 days | 8.71 |
| December 25, 2026 | December 25, 2027 | 365 | 52 weeks 1 day | 52.14 |
Weeks per month reference table
| Month | Days | Weeks + days | Decimal weeks |
|---|---|---|---|
| January | 31 | 4 wk 3 d | 4.43 |
| February | 28 | 4 wk 0 d | 4.00 |
| February (leap year) | 29 | 4 wk 1 d | 4.14 |
| March | 31 | 4 wk 3 d | 4.43 |
| April | 30 | 4 wk 2 d | 4.29 |
| May | 31 | 4 wk 3 d | 4.43 |
| June | 30 | 4 wk 2 d | 4.29 |
| July | 31 | 4 wk 3 d | 4.43 |
| August | 31 | 4 wk 3 d | 4.43 |
| September | 30 | 4 wk 2 d | 4.29 |
| October | 31 | 4 wk 3 d | 4.43 |
| November | 30 | 4 wk 2 d | 4.29 |
| December | 31 | 4 wk 3 d | 4.43 |
Weeks between dates in Excel or Google Sheets
Put the start date in A2 and the end date in B2. Spreadsheets store dates as day numbers, so B2 minus A2 is the days between them. Dividing that by 7 turns it into weeks.
| What you want | Formula |
|---|---|
| Weeks between A2 and B2, as a decimal | =(B2-A2)/7 |
| Whole weeks only | =INT((B2-A2)/7) |
| Leftover days after the whole weeks | =MOD(B2-A2,7) |
| Weeks until B2 from today | =INT((B2-TODAY())/7) |
| Work weeks, Monday to Friday | =NETWORKDAYS(A2,B2)/5 |
NETWORKDAYS counts both the start and the end date when they fall on weekdays. That makes it one day longer than the other formulas when both ends are workdays.
Common mistakes
- Subtracting week numbers. Week numbers reset each year, and ISO years have 52 or 53 weeks. 2026 has 53. Count the days and divide by 7 instead.
- Rounding up partial weeks. Six days is 0 full weeks and 6 days, not 1 week. Use the decimal figure when you need a fraction.
- Mixing 7-day blocks with calendar weeks. A Monday to the Friday of the next week is 11 days, or 1 week and 4 days. It still touches two calendar weeks.
- Treating a month as 4 weeks. Only February in a common year is exactly 4 weeks. Other months are 4 weeks plus 1 to 3 days.
- Counting today. Weeks until starts from tomorrow. A target exactly 7 days away is 1 week, not 1 week and 1 day.
Weeks until questions
How many weeks are there between two dates?
Take the earlier date from the later one to get the days, then divide by 7. January 1 to June 30, 2026 is 180 days, which is 25 weeks and 5 days. On this page, enter the first date in the From box and the second as the target. In a spreadsheet, =(B2-A2)/7 gives the same answer as a decimal.
How many weeks until Christmas?
Use the Christmas preset on this page or the weeks until Christmas countdown. The answer is whole weeks plus leftover days after today. From today, October 16, Christmas Day is 70 days away, exactly 10 weeks.
How do you calculate weeks until a date?
Count the days from today to the target date and divide by 7. The whole number is the weeks and the remainder is the leftover days. Today is not part of the count.
How many weeks until December?
Set the target to December 1 of this year, or next year once December has started. For the weeks up to December 31, use weeks left in the year.
What date is 6 weeks from today?
Press the 6 weeks preset and the target box fills in with that date. The weeks from today pages give the dates for common amounts, such as 2, 6 and 12 weeks.
How many weeks is 100 days?
100 days is 14 weeks and 2 days, or about 14.3 weeks. Divide by 7, and the remainder is the extra days.
How many weeks are in a year?
A common year has 52 weeks and 1 day, and a leap year has 52 weeks and 2 days. ISO week numbering gives some years 53 numbered weeks.
How many weeks are in a month?
About 4.35 weeks on average. February has exactly 4 weeks in a common year, and the 31-day months have 4 weeks and 3 days.
Does weeks until count partial weeks?
No. The main number is whole 7-day weeks, and the leftover days are shown next to it. The decimal figure is there when you need the fraction.
Cite this page
APA: ClockTotals. (2026, October 16). Weeks Until Calculator (Weeks Between Dates). https://clocktotals.com/weeks-until-calculator/
MLA: “Weeks Until Calculator (Weeks Between Dates).” ClockTotals, 16 Oct. 2026, clocktotals.com/weeks-until-calculator/.
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