Date Calculator
Calculate date differences and add/subtract days
About the Date Calculator
Counting the days between two dates by hand means wrestling with month lengths and leap years, and it is easy to be off by one. This calculator takes a start and end date and tells you the span in days, weeks, months, and years — and can count only working days when weekends should not count.
People use it to find how many days until a deadline, how long ago something happened, or how many business days a project window actually contains. The working-days option is what sets it apart for anyone planning around a Monday-to-Friday schedule, and an "include end date" toggle handles whether the final day counts.
How to Use the Date Calculator
- Pick the start date.
- Pick the end date (use the swap button if you entered them in the wrong order).
- Toggle "include end date" if the final day should count, and "working days only" to exclude weekends.
- Read the span in days, weeks, months, and years, plus the working-day count when enabled.
Why Use ToolForge’s Date Calculator
- It can count working days only, excluding Saturdays and Sundays — useful for business and project timelines, not just raw calendar days.
- It expresses the gap four ways at once (days, weeks, months, years), so you get the unit you need without extra math.
- An "include end date" toggle and a swap button handle the off-by-one and wrong-order mistakes that trip up manual counting.
- It works entirely in your browser, so your dates stay private.
Frequently Asked Questions
Does the calculation include both the start and end dates?
By default it counts the gap between the dates, not the end date itself. Turn on "include end date" to count the final day too — useful when you want the total number of days in a range rather than the difference between them.
How are working days counted?
With "working days only" enabled, the calculator steps through each day in the range and counts only Mondays through Fridays, skipping weekends. Note that it does not account for public holidays, which vary by country and region.
Why might the months figure look approximate?
Months vary in length, so the calculator derives months from the total day count using an average year length. For exact calendar-month differences, the day count is the most precise figure to rely on.
Can I count down to a future event?
This calculator measures the span between two chosen dates. To count down to an event, set the start to today and the end to the event date; the day count tells you how long remains, and the working-days option shows the business days left.
