Find the date 30 days from today, or 30 days from any date you choose. You can also count 30 days backward. Free, private, and runs entirely in your browser.
The calculator adds the number of days to the start date using the real calendar, so month lengths and leap years are handled correctly. Leave the start date blank to use today's date from your device.
What date is 30 days from today? Leave the start date blank. The calculator reads today's date on your device and shows the result date and weekday.
Is 30 days the same as a number of months? Not exactly. Months have 28 to 31 days, so 30 days can land a day or two away from one month later.
Starting on Sunday, March 1, 2026, adding 30 days lands on Tuesday, March 31, 2026. That is 4 weeks and 2 days after the start.
How many weeks is 30 days? 30 days is 4 weeks and 2 days, or 4.29 weeks.
Does it handle leap years? Yes. It uses the real calendar, including February 29.
Date arithmetic rests on the Gregorian calendar, introduced by Pope Gregory XIII in 1582 and now used almost everywhere. It adds a leap day in most years divisible by four, with exceptions for century years, so the average year is 365.2425 days. Spans of 30, 60 and 90 days became common in contracts, return policies and probation periods because they are easy to count and roughly match one, two and three months.
Use it for return windows, notice periods, payment terms such as net 30, and short goals. Enter any start date to plan ahead or look back. The result shows the weekday as well, which helps when a deadline must not fall on a weekend.
Can I count backward? Yes. Choose Before the start date to find the date 30 days ago.
Can I use a different number of days? Yes. Change the days field, or use the main days from today calculator for weeks and months too.