Sleep Latency Calculator
Check how long it takes you to fall asleep.
Your result
Most people fall asleep in 10–20 minutes. Falling asleep within about 5 minutes can point to sleep deprivation; regularly taking more than 30 minutes is worth discussing.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Sleep Latency Calculator do?
Check how long it takes you to fall asleep. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how long to fall asleep; sleep onset time; trouble falling asleep.