Helse

Sleep Calculator

How many complete sleep cycles will you get tonight? Enter your planned sleep hours and find the ideal duration to wake up feeling refreshed.

✓ Vurdert av Julian Bronski · oppdatert juni 2026

Dine opplysninger

Planned sleep hours 7.5

312+

Resultat

Complete sleep cycles

–

Ideal sleep duration (h)

–

Next cycle target (h)

–

✓ Kopiert!

Bygg inn kalkulatoren på nettstedet ditt ▾

Gratis. Kopier koden og lim den inn på siden din — kalkulatoren fungerer umiddelbart.

<iframe src="https://kalkulio.app/nb/sleep-calculator/embed/" style="width:100%;max-width:720px;height:505px;border:0;border-radius:16px;background:#faf9f4" title="Sleep Calculator" loading="lazy"></iframe>
<p style="margin:6px 0 0;font-size:13px"><a href="https://kalkulio.app/nb/sleep-calculator/" target="_blank">Sleep Calculator — gratis på kalkulio.app</a></p>

Slik fungerer Sleep Calculator

Human sleep occurs in cycles of 90 minutes each. Waking in the middle of a cycle leaves you groggy – it's best to wake after a complete number of cycles. Formula: cycles = ⌊hours × 60 ÷ 90⌋, ideal duration: cycles × 1.5 h.

Ofte stilte spørsmål

How long is a sleep cycle? ▾

A complete sleep cycle lasts about 90 minutes and includes light sleep, deep sleep and REM sleep. Most adults go through 4–6 cycles per night.

Why am I more tired after 8 hours than 7.5? ▾

You're probably waking in the middle of a cycle. 7.5 h (5 cycles) or 9 h (6 cycles) is better than exactly 8 h – try going to bed 15 minutes earlier.

What helps with falling asleep? ▾

Regular sleep times, darkness, a cool room (16–18°C) and no screens 30 minutes before bed are the most effective measures according to sleep research.

Ikke finansiell eller medisinsk rådgivning. Uten garanti.

Slik fungerer Sleep Calculator

Ofte stilte spørsmål

Flere kalkulatorer

Calorie Calculator

BMI-kalkulator

Protein Calculator