How to Calculate Date Difference Online

Some search engines can respond to math queries; taking the place of calculators.

Internet search engines can do far more than simply directing you to another website online. Many of the most powerful search engines, such as Wolfram Alpha, are able to perform simple calculations and respond to natural language queries. For example, these search engines can be used to find the difference between two dates. You can also use them to determine what the date will be a certain number of days from now.

Instructions

1. Browse to Wolfram Alpha using the links in the "Resources" section of this article.

2. Type "(number) days (before or after) (date)" and press "Enter" to determine what the date will be a certain number of days before or after the date of your choice. For example, your finished search might read "30 days after November 30, 2010." You could also type the date as "11/30/2010," or simply type "today." The date will be shown in the box labeled "Result." To find the difference between two specific dates, complete the next step.

3. Type "days between (date 1) and (date 2)" and press "Enter" to find the number of days between any two dates. Dates can be typed in either of the formats described in the previous step.

Tips & Warnings

• If you prefer using a more calendar-like interface for making date calculations, use OnlineConversion.com or TimeandDate.com (both links in "Resources"). OnlineConversion.com allows you to calculate the difference between any two dates, while TimeandDate.com can determine the date any number of days before or after the date of your choice.

Resources

• Wolfram Alpha Knowledge Engine
• Online Conversion: Difference Between Two Dates
• Time and Date: Add or Subtract Days from a Date