作为程序员，没有合适的工具，就得手搓一个，PC端，移动端均可适用。废话不多说，直接上代码。
HTML:
<div class="calculator"><label for="lastPeriod">最后一次月经的第一天：</label> <input id="lastPeriod" type="date"> <label for="cycleLength">月经周期长度 (天)：</label> <input id="cycleLength" type="number" value="28" placeholder="通常为28天"><button onclick="calculatePregnancy()">计算怀孕信息</button><div id="result" class="result">结果将显示在这里</div></div>
JS:
function calculatePregnancy() { const lastPeriodDate = new Date(document.getElementById('lastPeriod').value); const cycleLength = parseInt(document.getElementById('cycleLength').value); if (isNaN(lastPeriodDate.getTime()) || isNaN(cycleLength)) { document.getElementById('result').textContent = "请输入有效的日期和周期长度。"; return; } // 假设受孕日期为最后一次月经开始后的14天 const conceptionDate = new Date(lastPeriodDate); conceptionDate.setDate(conceptionDate.getDate() + (cycleLength - 14)); // 预产期为最后一次月经的280天（40周）之后 const dueDate = new Date(lastPeriodDate); dueDate.setDate(dueDate.getDate() + 280); // 当前怀孕天数和周数 const today = new Date(); const daysPregnant = Math.floor((today - conceptionDate) / (1000 * 60 * 60 * 24)); const weeksPregnant = Math.floor(daysPregnant / 7); document.getElementById('result').innerHTML = `预产期：${dueDate.toLocaleDateString()}<br>` + `受孕日期：${conceptionDate.toLocaleDateString()}<br>` + `当前怀孕：${weeksPregnant} 周 (${daysPregnant} 天)`; }
CSS:
.calculator { width: 100%; background-color: #333; color: white; padding: 20px; border-radius: 10px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); } label { display: block; margin-bottom: 10px; font-size: 16px; } input, select { width: 100%!important; padding: 10px!important; margin-bottom: 20px; color: #000000; border-radius: 5px; border: 1px solid #555; font-size: 16px!important; background-color: #ffffff!important; } button { width: 100%; padding: 10px; background-color: #007bff; color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 16px; } button:hover { background-color: orange; } .result { font-size: 18px; margin-top: 20px; text-align: center; } option { background-color: #ffffff; } p { font-size: 18px; margin-top: 5px!important; }
