## Calculating child's age

#### Articles

1. [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/)
2. [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/)
3. [When calculating a child's age to choose the correct age interval, does the date administered count as a complete day in the calculation?](https://support.agesandstages.com/kb/article/376-when-calculating-a-childs-age-to-choose-the-correct-age-interval-does-the-date-administered-count-as-a-complete-day-in-the-calculation/)
4. [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/)