**Таисия**Интересное обновление. А как это можно использовать и для каких целей?

*This is a re-post of a comment on Introducing Field Calculations for Forms*- JotForm Support
**Welvin**Hi,

The main usage of the calculation feature is to sum, substract, multiply and divide numbers. Let's say, for example, you want to know the number of days between two different dates.

Example Form: http://www.jotform.com/form-templates/calculate-number-of-days

More calculation forms here: http://www.jotform.com/form-templates/category/calculation-form.

Calculation guide: http://www.jotform.com/help/259-How-to-perform-calculation-in-the-form

Let us know here if you have any additional questions about this feature.

Thanks