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Welcome to Sleep Calculator

Free · Private · Science-backed

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Not Medical Advice This tool provides general educational estimates based on typical sleep-cycle averages. It is not medical advice. If you have ongoing sleep problems, please consult a qualified doctor.

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Your Data Stays on Your Device Everything you enter — sleep times, diary entries, schedules — is saved only in your browser's local storage. Nothing is uploaded to any server. We never see your data.

🔌 Free · No Account · No Ads

Embed Our Free Sleep Calculator

Add a fully functional bedtime and wake-time calculator to your blog, website or health portal in one line of HTML. Free forever, no account, no API key, no ads shown to your users.

👁 Live Preview

📋 Embed Code

Copy and paste this into your website HTML wherever you want the widget to appear.

<iframe 
  src="https://sleepcalculators.site/widget.html" 
  width="420" 
  height="320" 
  frameborder="0" 
  style="border-radius:16px;box-shadow:0 4px 24px rgba(0,0,0,.12);"
  title="Free Sleep Calculator"
  loading="lazy"></iframe>

⚙️ Customise Size

Width (px)

Height (px)

✅ Why Embed This Widget?

🆓 Completely free — no subscription, no API key, no account required. Ever.

📵 No ads — your users will never see advertising inside the widget.

🔒 No tracking — the widget does not collect user data or install cookies on your site.

⚡ Zero setup — one line of HTML. Works on WordPress, Wix, Squarespace, Ghost, raw HTML.

📱 Mobile responsive — looks perfect on phones, tablets and desktops.

🔗 Always up to date — we maintain it. You never need to update your code.

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