Days to Weeks Converter
Convert days to weeks instantly, or weeks back to days. Shows decimal weeks plus the weeks and days breakdown. One week is exactly 7 days, so every result is precise.
Days to Weeks Calculator
Tip: decimals work too, for example 1.5 days.
Formula: weeks = days ÷ 7 | days = weeks × 7
How to Convert Days to Weeks
To convert days to weeks, divide the number of days by 7. That is the whole days to weeks formula: there is no other factor, because a week is always exactly 7 days. For example, 10 days becomes 1.4285714286 weeks. To convert weeks to days, do the reverse and multiply by 7: 2.5 weeks becomes 17.5 days.
Days to weeks table (1 to 30 days)
Quick reference chart: days to weeks decimal, plus the weeks and days split.
| Days | Weeks (decimal) | Weeks + days |
|---|---|---|
| 1 | 0.1428571429 | 1 day |
| 2 | 0.2857142857 | 2 days |
| 3 | 0.4285714286 | 3 days |
| 4 | 0.5714285714 | 4 days |
| 5 | 0.7142857143 | 5 days |
| 6 | 0.8571428571 | 6 days |
| 7 | 1 | 1 week |
| 8 | 1.1428571429 | 1 week, 1 day |
| 9 | 1.2857142857 | 1 week, 2 days |
| 10 | 1.4285714286 | 1 week, 3 days |
| 11 | 1.5714285714 | 1 week, 4 days |
| 12 | 1.7142857143 | 1 week, 5 days |
| 13 | 1.8571428571 | 1 week, 6 days |
| 14 | 2 | 2 weeks |
| 15 | 2.1428571429 | 2 weeks, 1 day |
| 16 | 2.2857142857 | 2 weeks, 2 days |
| 17 | 2.4285714286 | 2 weeks, 3 days |
| 18 | 2.5714285714 | 2 weeks, 4 days |
| 19 | 2.7142857143 | 2 weeks, 5 days |
| 20 | 2.8571428571 | 2 weeks, 6 days |
| 21 | 3 | 3 weeks |
| 22 | 3.1428571429 | 3 weeks, 1 day |
| 23 | 3.2857142857 | 3 weeks, 2 days |
| 24 | 3.4285714286 | 3 weeks, 3 days |
| 25 | 3.5714285714 | 3 weeks, 4 days |
| 26 | 3.7142857143 | 3 weeks, 5 days |
| 27 | 3.8571428571 | 3 weeks, 6 days |
| 28 | 4 | 4 weeks |
| 29 | 4.1428571429 | 4 weeks, 1 day |
| 30 | 4.2857142857 | 4 weeks, 2 days |
Days to Weeks FAQs
How do I convert days to weeks?
Divide the number of days by 7. The formula is: weeks = days / 7. For example, 10 days / 7 = 1.4285714286 weeks, which is the same as 1 week and 3 days. One week is exactly 7 days by international standard, so the conversion is exact.
How many weeks is 1 day?
One day is 0.142857143 weeks when rounded to 9 decimal places. That is the answer Google shows for the search "days to weeks". The exact value is 1/7 of a week, which is 0.1428571429 weeks at 10 decimals.
How many weeks are in 10 days?
10 days is 1.4285714286 weeks. In weeks and days, that is 1 week and 3 days, because 10 = 1 x 7 + 3.
How many weeks are in 30 days?
30 days is 4.2857142857 weeks. In weeks and days, that is 4 weeks and 2 days, because 30 = 4 x 7 + 2.
How many weeks is 100 days?
100 days is 14.2857142857 weeks. In weeks and days, that is 14 weeks and 2 days, because 100 = 14 x 7 + 2.
How many weeks are in 365 days?
365 days is 52.1428571429 weeks, or 52 weeks and 1 day. That is why a calendar year is often described as 52 weeks: 52 weeks is exactly 364 days, leaving 1 extra day (2 in a leap year).
How many weeks is 90 days?
90 days is 12.8571428571 weeks, or 12 weeks and 6 days.
How many weeks is 45 days?
45 days is 6.4285714286 weeks, or 6 weeks and 3 days.
How do I convert weeks back to days?
Multiply the number of weeks by 7. The formula is: days = weeks x 7. For example, 2.5 weeks x 7 = 17.5 days, and 52 weeks x 7 = 364 days.
How many days are in a week?
There are exactly 7 days in a week. This is fixed by international standard (ISO 8601) and is the same in every country, so 1 week = 7 days is an exact conversion with no exceptions.
Why does Google say 1 day equals 0.142857143 weeks?
Google divides 1 by 7 and rounds the result to 9 decimal places: 1 / 7 = 0.142857142857..., which rounds to 0.142857143. The exact value is 1/7, a repeating decimal.
Can I convert fractional days like 1.5 days?
Yes. Just divide the decimal value by 7. For example, 1.5 days / 7 = 0.2142857143 weeks. The calculator above accepts decimal days and decimal weeks.
How do I convert days to weeks in Excel or Google Sheets?
Use the formula =A1/7, where A1 holds the number of days. For example, if A1 contains 10, the formula returns 1.4285714286. To show whole weeks and leftover days, use =INT(A1/7) for weeks and =MOD(A1,7) for remaining days.
Is 14 days equal to 2 weeks?
Yes, exactly. 14 / 7 = 2, so 14 days is exactly 2 weeks. Likewise, 7 days is exactly 1 week, 21 days is exactly 3 weeks, and 28 days is exactly 4 weeks.
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