HisabCalc › Discounts & tips

Date Difference Calculator

Days, weeks, months and years between two dates.

Enter your numbers

From date

Example: 2026-01-01

To date

Example: 2026-10-02

Result

Currency

Figures are computed on your device; nothing is sent anywhere.

Formula

days counted on the calendar, then weeks and months derived

How the calculation works

The days are counted on the calendar, then the weeks and months are derived from that count. Days is the honest figure and the one to trust; weeks is the days divided by seven, and months are counted on the calendar rather than as 30-day blocks, so 1 January to 1 March is exactly two months even though it is 59 days.

The direction does not matter: the answer is the gap between the two dates, and the calculator flips them if they are entered the wrong way round rather than refusing. What does matter is whether you want the gap or the count of days. A gap of one day is the 1st to the 2nd; a count of working days, or hotel nights, includes one end and would be one higher.

Common mistakes

Reading the day count as the gap when the first day should be included -- a leave request wants the count, not the gap.
Dividing the days by 30 for months, which is wrong across February and across a 31-day month.
Assuming the order matters. It does not; the gap is the same either way.

When to use it

Use it for a gap between two dates, a countdown, or a notice period.
For working days, subtract weekends and holidays yourself -- this counts every calendar day.

Worked example

1 January to 2 October 2026: 274 days, 39.1 weeks, 9 months.

Total days 274

Weeks 39.1

Total months 9

Whole years 0

Common questions

Is the first day counted?

No, this measures the gap, so the 1st to the 2nd is one day. In some settings -- hotel nights, working days -- the first day is counted too, and the answer is one higher.

How are the months counted?

On the calendar, not as 30-day blocks. So 1 January to 1 March is exactly two months, even though it is 59 days, which dividing by 30 would call under two.

Last updated: 2026-10-02