How the bedtime calculator works
It subtracts your chosen duration from the wake time. Add time for winding down and falling asleep yourself.
Sleep needs differ
Age, health, work patterns and individual needs matter. The calculator does not diagnose sleep problems or prescribe a duration.
When to get help with sleep
Read HSE insomnia guidance. Contact a healthcare professional if sleep difficulty persists or affects safety.
Planning aid only, not medical advice.