🔬 Sleep Age Calculator — How to Use
What This Tool Does
Sleep Age estimates how old your sleep habits make your body function — compared to what science expects at your real age. It translates abstract research into a single number.
When to Use It
Use it as a motivational check-in. Retake after making improvements to see the number drop.
Fields Explained
Real Age
Your actual age in years.
Duration
How many hours you typically sleep per night.
Quality
How rested you feel on waking — 1 is terrible, 10 is perfect.
Consistency
How regular your sleep and wake times are — 1 is completely random, 10 is the same time every day.
Other Factors
Snoring, exercise frequency, caffeine timing, and stress each add or subtract from your sleep age.
Reading the Result
Your estimated Sleep Age and a breakdown showing exactly which factors are ageing you versus keeping you young.
Pro Tips
Consistency has the biggest single impact — same wake time matters more than perfect duration.
Cutting caffeine after noon and reducing alcohol each subtract several sleep-age years.
A sleep age 10+ years above your real age is worth discussing with a doctor.
Try a Sample
Sample scenario
A 35-year-old with 7 hours of sleep, good quality (7/10), and mostly consistent habits.
Expected result: Sleep Age around 28–32 · Younger than real age · Factor-by-factor breakdown
🔬 Based on Sleep Science
Your Sleep Age Calculator
Poor sleep accelerates biological ageing. Answer 8 questions about your sleep habits and discover the gap between your calendar age and how old your body actually sleeps.
Tell us about your sleep
Between 13 and 90
Nightly sleep duration
7 hours
3h (severe)7–9h (optimal)12h (excessive)
Sleep quality (self-rated)
5 / 10
1 (terrible)5 (average)10 (perfect)
Schedule consistency (same bedtime nightly)
5 / 10