## Showing articles from ASQ Calculator app tag

### [We give parents both ASQ-3 and ASQ:SE-2 at the same time. Which ASQ:SE-2 questionnaire should be used if there isn't a questionnaire that corresponds directly to child's age assessed with ASQ-3 (for example, 8 months)?](https://support.agesandstages.com/kb/article/236-we-give-parents-both-asq3-and-asqse2-at-the-same-time-which-asqse2-questionnaire-should-be-used-if-there-isnt-a-questionnaire-that-corresponds-directly-to-childs-age-assessed-with-asq3-for-example-8-months/)

There are no gaps between age intervals for ASQ-3 and ASQ:SE-2 questionnaires so there is always a questionnaire available for children in the appropriate age ranges (1-66 months for ASQ-3 and 1-72 months for ASQ:SE-2). Even when there is not an ASQ:SE-2 questionnaire with the exact same age as an ASQ-3 questionnaire…

### [The age calculator on the website sometimes gives an age that is slightly different than if I calculate by hand using the instructions in the User's Guide. Why does this occur?](https://support.agesandstages.com/kb/article/232-the-age-calculator-on-the-website-sometimes-gives-an-age-that-is-slightly-different-than-if-i-calculate-by-hand-using-the-instructions-in-the-users-guide-why-does-this-occur/)

The age calculator on the website and in the app stores uses an actual calendar to calculate a child's age. It takes into account which months have 30 days and which months have 31 days, and therefore provides a more precise age calculation. For ease of use, the manual calculation described in the User's Guides ass…

### [How do you calculate what age interval of the ASQ-3 should be used?](https://support.agesandstages.com/kb/article/143-how-do-you-calculate-what-age-interval-of-the-asq3-should-be-used/)

To determine the correct ASQ-3 interval for a child, you need to calculate a child's age in months and days. For easy age calculation, you can use our website calculator or the free ASQ Calculator app available in the Apple and Google Play app stores. A by-hand method is described on page 65 of the ASQ-3 User's …

### [When calculating a child's age, what is your month equivalent in weeks? If a child is 44 weeks old, is he 11 months old?](https://support.agesandstages.com/kb/article/233-when-calculating-a-childs-age-what-is-your-month-equivalent-in-weeks-if-a-child-is-44-weeks-old-is-he-11-months-old/)

When calculating a child's age, the developers recommend calculating in months and days, rather than weeks. Because all months except for February are longer than 4 weeks, using 4 weeks to represent a month increases a child's age artificially. For easy age calculation, you can use our website calculator or the fre…