Date Difference Calculator
Calculate the exact number of days, weeks, months and hours between any two dates. Quick preset buttons for +7, +30, +90 days and +1 year.
✅ Free 📅 Precise Difference ⏱️ All Units 🔒 Private
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Date Difference Calculator📅
Precise Difference
Exact count in days, weeks, months, hours and minutes.
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Quick Presets
+7, +30, +90 day and +1 year preset buttons for fast planning.
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Weekday Estimate
Approximate weekday and weekend count in the date range.
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Private
All calculations run in your browser. No dates sent anywhere.
⭐ User Reviews
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Alex T.
Yesterday
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Exactly what I needed — clean inputs, instant results, and the breakdown shows the working so I can double-check. Bookmarked.
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Sara K.
2 days ago
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I use this every week for my freelance invoicing. The copy buttons save so much time when pasting into spreadsheets.
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Dan M.
1 week ago
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No ads cluttering the page, no sign-up wall. Just enters the numbers and get the answer. Refreshingly simple.
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Laura B.
2 weeks ago
⭐⭐⭐⭐⭐
The formula explanation below the result is a great learning aid. I now understand the maths behind what I was calculating.
Calculator Tools📖 How to Use
1
Set start date
Today's date is pre-filled as the start. Change as needed.
2
Set end date
Choose the end date, or use the quick preset buttons.
3
Read difference
Days, weeks, months, hours and minutes all displayed.
4
Use presets
Click +7, +30, +90, or +1 year buttons to set end date quickly.
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❓ FAQ
How many days between two dates?+
The number of days between two dates is calculated by subtracting the start date from the end date. Each day = 86,400 seconds. The result accounts for leap years automatically.
How do I count business days between dates?+
Business days (weekdays) are approximately 5/7 of total days. This tool provides an estimate. For exact business day counts accounting for holidays, you need a region-specific calendar.
How many weeks between two dates?+
Divide the total number of days by 7. The remainder gives the extra days beyond complete weeks. For example, 100 days = 14 weeks and 2 days.
Why would I need to calculate date differences?+
Common uses: contract deadlines, payment due dates, project timelines, age verification, insurance and warranty calculations, rental periods, subscription durations, and countdown timers.
How are months calculated between dates?+
Calendar months between dates are approximate because months have different lengths (28–31 days). This tool shows an estimated month count based on the average month length of 30.44 days.