What time should lights go out?
Start from the time they need to be awake, and work backwards.
Everything runs in your browser. Nothing you type is sent to us or saved.
The other calculators
- Age Calculator Work out exactly how old your child is today — years, months, weeks, days, even seconds. Free, instant, and nothing you type ever leaves your browser.
- Snacks & Water Calculator A rough guide to how much water and how much fruit and veg a child gets through in a day, by age. Free, instant, and nothing is saved.
- Toy Math Adding and taking away, shown with objects a child can count on the screen. A visual way into early maths for ages 3 to 7. Free, no signup.
- Color Mixer Pick two paints and see what they make. A quick way to answer the question that comes up every single time the paints come out. Free and instant.
- Crawling & Walking Chart The usual age ranges for rolling, crawling, standing and first steps, shown as a chart. General information only — every child arrives in their own time.
- Baby Teeth Chart An interactive chart of all twenty baby teeth and the months each one usually appears. General information only — order and timing vary a lot.
All of them run entirely in your browser. Nothing you type is sent to us, stored, or used for anything — which matters most on the tools that ask for a birthday.