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	<title>Sleep Calculator &#8211; pk-360</title>
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	<title>Sleep Calculator &#8211; pk-360</title>
	<link>https://pk-360.com</link>
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	<item>
		<title>Sleep Calculator</title>
		<link>https://pk-360.com/sleep-calculator/</link>
		
		<dc:creator><![CDATA[Haider]]></dc:creator>
		<pubDate>Wed, 13 Aug 2025 17:41:38 +0000</pubDate>
				<category><![CDATA[Health]]></category>
		<category><![CDATA[Sleep Calculator]]></category>
		<category><![CDATA[90 Minute Sleep Cycle]]></category>
		<category><![CDATA[Bedtime Calculator]]></category>
		<category><![CDATA[Best Time to Sleep]]></category>
		<category><![CDATA[Better Sleep]]></category>
		<category><![CDATA[Healthy Sleep]]></category>
		<category><![CDATA[Ideal Bedtime]]></category>
		<category><![CDATA[Rest Calculator]]></category>
		<category><![CDATA[Sleep Cycle Calculator]]></category>
		<category><![CDATA[Sleep Cycles]]></category>
		<category><![CDATA[Sleep Health]]></category>
		<category><![CDATA[Sleep Optimization]]></category>
		<category><![CDATA[Sleep Patterns]]></category>
		<category><![CDATA[Sleep Planning]]></category>
		<category><![CDATA[Sleep Schedule]]></category>
		<category><![CDATA[Sleep Science]]></category>
		<category><![CDATA[Sleep Time Calculator]]></category>
		<category><![CDATA[Sleep Tracker]]></category>
		<category><![CDATA[Wake Up Time Calculator]]></category>
		<guid isPermaLink="false">https://pk-360.com/?page_id=658</guid>

					<description><![CDATA[Zz Sleep Cycle Calculator Uses 90-minute cycles + ~15 min to fall asleep I need to wake up at… I plan to go to bed at… Wake time Get bedtimes Bedtime Get wake times Tip: Adults typically do well with 5–6 cycles (≈7.5–9 hours). If you’re short on time, aim for a whole cycle rather]]></description>
										<content:encoded><![CDATA[
<!-- Sleep Cycle Calculator (drop into a WordPress Custom HTML block) -->
<div id="sleep-calc" class="sc-container" role="application" aria-label="Sleep Calculator">
  <style>
    /* ---- Minimal, self-contained styles ---- */
    #sleep-calc .sc-card{max-width:860px;margin:24px auto;padding:22px;border-radius:18px;box-shadow:0 8px 24px rgba(0,0,0,.08);background:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,'Noto Sans',sans-serif;color:#0f172a}
    #sleep-calc .sc-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
    #sleep-calc .sc-logo{width:36px;height:36px;border-radius:10px;background:#eef2ff;display:grid;place-items:center;font-weight:700;color:#4f46e5}
    #sleep-calc h1{font-size:22px;margin:0}
    #sleep-calc .sc-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 18px}
    #sleep-calc .sc-tab{border:1px solid #e5e7eb;border-radius:999px;padding:8px 14px;background:#f8fafc;cursor:pointer;user-select:none}
    #sleep-calc .sc-tab[aria-selected="true"]{background:#4f46e5;color:#fff;border-color:#4f46e5}
    #sleep-calc .sc-grid{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:end}
    #sleep-calc label{font-size:14px;color:#334155;margin-bottom:6px;display:block}
    #sleep-calc input[type="time"]{appearance:none;border:1px solid #e5e7eb;border-radius:12px;padding:10px 12px;font-size:16px;width:100%;background:#fff}
    #sleep-calc .sc-btn{border:none;border-radius:12px;padding:10px 14px;background:#0ea5e9;color:#fff;font-weight:600;cursor:pointer}
    #sleep-calc .sc-btn:disabled{opacity:.55;cursor:not-allowed}
    #sleep-calc .sc-foot{font-size:12px;color:#475569;margin-top:10px}
    #sleep-calc .sc-results{margin-top:18px;border-top:1px dashed #e5e7eb;padding-top:14px}
    #sleep-calc .sc-pill-row{display:flex;flex-wrap:wrap;gap:10px}
    #sleep-calc .sc-pill{background:#f1f5f9;border:1px solid #e2e8f0;border-radius:999px;padding:8px 12px;font-weight:700}
    #sleep-calc .sc-small{font-weight:500;opacity:.75;margin-left:8px}
    #sleep-calc .sc-copy{margin-left:6px;border:1px solid #cbd5e1;background:#fff;color:#0f172a}
    #sleep-calc .sc-tip{margin-top:16px;background:#f8fafc;border:1px solid #e5e7eb;border-radius:12px;padding:12px;font-size:14px}
    #sleep-calc .sc-badge{display:inline-block;background:#ecfeff;border:1px solid #a5f3fc;color:#0369a1;font-size:12px;border-radius:999px;padding:3px 8px;margin-left:8px}
    @media (max-width:520px){#sleep-calc .sc-grid{grid-template-columns:1fr}#sleep-calc .sc-btn{width:100%}}
  </style>

  <div class="sc-card">
    <div class="sc-header">
      <div class="sc-logo">Zz</div>
      <div>
        <h1>Sleep Cycle Calculator</h1>
        <div class="sc-foot">Uses 90-minute cycles + ~15 min to fall asleep</div>
      </div>
    </div>

    <!-- Tabs -->
    <div class="sc-tabs" role="tablist" aria-label="Calculator mode">
      <button class="sc-tab" role="tab" id="tab-wake" aria-selected="true">I need to wake up at…</button>
      <button class="sc-tab" role="tab" id="tab-bed" aria-selected="false">I plan to go to bed at…</button>
    </div>

    <!-- Wake Mode -->
    <section id="panel-wake" role="tabpanel" aria-labelledby="tab-wake">
      <div class="sc-grid">
        <div>
          <label for="wake-time">Wake time</label>
          <input id="wake-time" type="time" inputmode="numeric" required>
        </div>
        <button id="calc-from-wake" class="sc-btn">Get bedtimes</button>
      </div>
      <div class="sc-results" aria-live="polite" id="wake-results"></div>
    </section>

    <!-- Bed Mode -->
    <section id="panel-bed" role="tabpanel" aria-labelledby="tab-bed" hidden>
      <div class="sc-grid">
        <div>
          <label for="bed-time">Bedtime</label>
          <input id="bed-time" type="time" inputmode="numeric" required>
        </div>
        <button id="calc-from-bed" class="sc-btn">Get wake times</button>
      </div>
      <div class="sc-results" aria-live="polite" id="bed-results"></div>
    </section>

    <div class="sc-tip">
      Tip: Adults typically do well with <strong>5–6 cycles</strong> (≈7.5–9 hours). If you’re short on time,
      aim for a whole cycle rather than waking mid-cycle.
      <span class="sc-badge">Wellness</span>
    </div>
  </div>

  <script>
    (function () {
      // ---- Utilities ----
      const CYCLE_MIN = 90;         // minutes per sleep cycle
      const SLEEP_ONSET = 15;       // minutes to fall asleep

      const $ = (sel) => document.querySelector(sel);

      function parseTimeToMinutes(hhmm) {
        if (!hhmm) return null;
        const [h, m] = hhmm.split(':').map(Number);
        return (h * 60) + (m || 0);
      }

      function minutesToTime(mins) {
        mins = ((mins % (24 * 60)) + (24 * 60)) % (24 * 60); // wrap 24h safely
        const h = Math.floor(mins / 60);
        const m = mins % 60;
        const label = new Date(0, 0, 0, h, m).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' });
        return label;
      }

      function buildPills(times, noteLabel) {
        return `
          <div class="sc-pill-row">
            ${times.map(t => `
              <span class="sc-pill">
                ${t.label}
                <span class="sc-small">(${t.note})</span>
                <button class="sc-copy sc-pill" data-copy="${t.label}" title="Copy time">Copy</button>
              </span>
            `).join('')}
          </div>
        `;
      }

      function copyToClipboard(text) {
        navigator.clipboard?.writeText(text).then(() => {}, () => {});
      }

      // ---- Tabs ----
      const tabWake = $('#tab-wake');
      const tabBed  = $('#tab-bed');
      const panelWake = $('#panel-wake');
      const panelBed  = $('#panel-bed');

      function selectTab(tab) {
        const wakeSelected = tab === 'wake';
        tabWake.setAttribute('aria-selected', wakeSelected);
        tabBed.setAttribute('aria-selected', !wakeSelected);
        panelWake.hidden = !wakeSelected;
        panelBed.hidden  = wakeSelected;
      }

      tabWake.addEventListener('click', () => selectTab('wake'));
      tabBed .addEventListener('click', () => selectTab('bed'));

      // ---- Calculations ----
      // From Wake: recommend bedtimes counting backward 6→4 cycles (+ onset)
      $('#calc-from-wake').addEventListener('click', () => {
        const mins = parseTimeToMinutes($('#wake-time').value);
        const out = $('#wake-results');
        if (mins == null) {
          out.innerHTML = '<div>Please enter a wake time.</div>';
          return;
        }
        const cycles = [6, 5, 4]; // show three best options; adjust if you like
        const times = cycles.map(c => {
          const total = mins - (c * CYCLE_MIN) - SLEEP_ONSET;
          return {
            label: minutesToTime(total),
            note: `${c} cycles ≈ ${((c * CYCLE_MIN)/60).toFixed(1)} h + ${SLEEP_ONSET} min`
          };
        });
        out.innerHTML = `
          <h3 style="margin:0 0 10px">Recommended bedtimes</h3>
          ${buildPills(times)}
          <div class="sc-foot" style="margin-top:10px">
            Based on ${CYCLE_MIN}-minute cycles and ~${SLEEP_ONSET} minutes to fall asleep.
          </div>
        `;
      });

      // From Bed: recommend wake times counting forward 4→6 cycles (+ onset)
      $('#calc-from-bed').addEventListener('click', () => {
        const mins = parseTimeToMinutes($('#bed-time').value);
        const out = $('#bed-results');
        if (mins == null) {
          out.innerHTML = '<div>Please enter a bedtime.</div>';
          return;
        }
        const cycles = [4, 5, 6];
        const times = cycles.map(c => {
          const total = mins + (c * CYCLE_MIN) + SLEEP_ONSET;
          return {
            label: minutesToTime(total),
            note: `${c} cycles ≈ ${((c * CYCLE_MIN)/60).toFixed(1)} h + ${SLEEP_ONSET} min`
          };
        });
        out.innerHTML = `
          <h3 style="margin:0 0 10px">Recommended wake times</h3>
          ${buildPills(times)}
          <div class="sc-foot" style="margin-top:10px">
            Based on ${CYCLE_MIN}-minute cycles and ~${SLEEP_ONSET} minutes to fall asleep.
          </div>
        `;
      });

      // Delegate copy buttons
      document.addEventListener('click', (e) => {
        const btn = e.target.closest('button.sc-copy');
        if (!btn) return;
        const t = btn.getAttribute('data-copy');
        if (t) copyToClipboard(t);
        btn.textContent = 'Copied';
        setTimeout(() => (btn.textContent = 'Copy'), 1200);
      });

      // Smart defaults: set wake to 07:00 local
      const wake = $('#wake-time');
      if (wake && !wake.value) wake.value = '07:00';
    })();
  </script>
</div>



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