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Age & School Days Calculator
Ages, school-day counts and school-entry age checks. Everything happens on this page, in your browser — nothing you enter is sent anywhere.
Age calculator
School days between two dates
School days here means Monday to Friday. It cannot know your holidays, strikes or snow days — subtract those yourself for an attendance-grade estimate.
How this tool works
Age arithmetic looks easy and trips everyone: months have different lengths, leap years insert a day, and 'how old on the school cut-off date' is the version that actually decides classrooms. This page does the borrowing-across-months carefully so you do not have to.
Using it, step by step
- Enter the date of birth and the date you want the age on — today is filled in for you.
- For school planning, add the entry year to see the age on 1 September of that year.
- For term planning, use the school-days counter between term dates, then subtract your school's holidays from the figure it gives.
Where it stops
School-entry rules are set locally and change: cut-off dates are not 1 September everywhere, and some systems judge by the year of birth alone. This page gives exact calendar arithmetic; the admissions office gives the rule that applies to your child.