Days Between Two Dates Calculator
Pick two dates and the calculator returns the number of days between them, along with the same span expressed in weeks and in years, months and days. Order does not matter, since it works out which date comes first for you.
Three ways to express the same gap
The raw day count is the number most people want, and it is the one that is unambiguous. 100 days is 100 days regardless of which months it crosses.
The years, months and days breakdown is more readable but less precise, because months vary in length. A span shown as "1 year, 2 months and 5 days" is exact for those specific dates, but the same description would be a different number of days between a different pair.
The week count is useful when the weekday matters, since a whole number of weeks means both dates fall on the same day of the week.
By default the count excludes the end date, which is the standard convention. If you need to include both endpoints, add one to the result.
What people use the day count for
Project and contract durations, where the exact number of days affects billing, penalties, or delivery terms.
Age in days is a common one, whether for curiosity or for medical dosing that is based on precise age.
Employment length for benefits, notice, or service milestones.
Trip planning and visa limits, particularly the rolling day-count rules that some countries apply to visitors.
And countdowns, which is probably the most common reason of all: how long until a wedding, exam, launch, or holiday.
Frequently asked questions
Does the count include both dates?
No. By default the end date is excluded, which is the standard convention. If you need both endpoints counted, add one to the result.
Does the order of the dates matter?
No. The calculator works out which date is earlier and returns a positive day count either way.
Why does the years and months breakdown look different from the day count?
Because months are not a fixed length. The breakdown is calendar-accurate for the exact dates you entered, but the same description would map to a different number of days for a different pair of dates.
Does it count business days?
No, this counts every calendar day including weekends and holidays. Business-day counting follows different rules and depends on which holidays apply where you are.