Be prepared with the most accurate 10-day forecast for Seattle, Washington with highs, lows, chance of precipitation from The Weather Channel and Weather.com The Date Calculator adds or subtracts days, weeks, months and years from a given date. Find out what the date will be after a chosen number of days with multiple day month and year formats Calculate future/past dates instantly with our days-from-date tool. For example, to find out what date will be 10 days from now, enter 10 in the appropriate field, select the units of measurement “days”, the period “from”, select today in the calendar and click the “Calculate” button. To use the Days Calculator, you just need to pick first the operation you want to use - add days, subtract days or get the days between two dates. You just need to enter the values on corresponding inputs and click on Calculate button. Here's a more detailed step by step guide. To get started, enter the start date to which you need to add/subtract days (today's date is initially displayed). Use the calendar for more convenient date selection. Use our Date Calculator to add or subtract days, weeks, months, or years from any date, or calculate the difference between two dates. This free date calculator computes the difference between two dates. It can also add to or subtract from a date. Both can deal with business days and holidays. Calculator to add days to a date or subtract days from a date. Calculate a calendar date given how many days or business days into the future or the past.