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नि:शुल्क Sleep Cycle Calculator

Find the best time to go to bed or wake up based on 90-minute sleep cycles, so you wake between cycles feeling refreshed instead of groggy.

Runs in your browserNo sign-up, no pop-upsलगइन आवश्यक छैनसधैँका लागि नि:शुल्क
Go to bed at
9:45 PM
9 hrs
6 cycles · ideal
Go to bed at
11:15 PM
7.5 hrs
5 cycles · ideal
Go to bed at
12:45 AM
6 hrs
4 cycles
Go to bed at
2:15 AM
4.5 hrs
3 cycles

💡 Sleep happens in ~90-minute cycles. Waking at the end of a cycle (rather than mid-cycle) helps you feel refreshed instead of groggy. Most adults do best with 5–6 cycles (7.5–9 hours), plus ~15 minutes to drift off.

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यो कसरी काम गर्छ

1
प्रविष्ट गर्नुहोस्
आफ्नो पाठ वा डेटा प्रविष्ट गर्नुहोस्।
2
प्रशोधन
तपाईंको ब्राउजरमा तुरुन्त प्रशोधन। कुनै सर्भर छैन, प्रतीक्षा छैन।
3
डाउनलोड
आफ्नो परिणाम सुरक्षित गर्नुहोस्। केही भण्डार गरिँदैन।

हाम्रो किन प्रयोग गर्ने?

Completely free — no hidden costs, ever
No account, email, or login required
Runs entirely in your browser — no uploads
Works on any device — phone, tablet, desktop
Open and ad-supported, with no tracking
Loads fast, with no installation needed

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