How to convert weeks to days
One week contains 7 days, so to convert weeks to days you multiply by 7. For example, 6 weeks × 7 = 42 days. Two weeks (a fortnight) is 14 days, and 4 weeks is 28 days.
The seven-day week is a fixed civil unit, so unlike months it never varies in length: every week is exactly 7 days regardless of leap years, time zones or where in the calendar it falls. That makes the conversion exact rather than approximate, which is why deadlines are so often written in weeks in the first place.
Worked examples: a 12-week course runs 84 days, a 40-week pregnancy is 280 days from the last menstrual period, and a 26-week half-year is 182 days. A standard notice period of 8 weeks is 56 days — worth checking, because a contract that says "two months" instead could mean 59, 61 or 62 days.
How to use this calculator
Enter a number of weeks (whole or decimal) and the days appear instantly. To take it further into hours, use the days to hours calculator, or convert years with the years to days calculator.
Decimals are handled directly, which is useful when a plan is expressed in part-weeks: 2.5 weeks is 17.5 days and 0.5 weeks is 3.5 days. If you need a whole number of days, round the result rather than the weeks, since rounding first can shift the answer by several days on a long span.
Quick reference
1 week = 7 days, 2 weeks = 14 days, 4 weeks = 28 days, and 52 weeks = 364 days. Decimal weeks work too: 1.5 weeks = 10.5 days.
The 52-week figure is the one that catches people out. Fifty-two weeks is 364 days, a day short of a 365-day year and two short of a leap year, so a year is really 52 weeks and 1 day. Over time those spare days accumulate, which is why some years contain 53 ISO week numbers and why weekly pay schedules occasionally produce a 53-pay year. To continue the chain downward use the days to hours calculator, and for longer spans the years to days calculator or the months to days calculator.
Frequently asked questions
- How many days are in 6 weeks?
- There are 42 days in 6 weeks, because 6 × 7 = 42.
- How do I convert weeks to days?
- Multiply the number of weeks by 7. Each week contains exactly 7 days.
- How many days are in 2 weeks?
- Two weeks is 14 days, since 2 × 7 = 14.
- How many days are in 52 weeks?
- 52 weeks is 364 days, which is one day short of a 365-day year.
- Is 4 weeks the same as a month?
- No. Four weeks is 28 days, but every month except February is 30 or 31 days long, so a monthly deadline is usually two or three days longer than a four-week one. Over a year the gap adds up to a full extra month — 13 four-week periods against 12 calendar months.