预产期计算器

根据末次月经第一天或受孕日期估算预产期。

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使用方法

1
选择设置
填写信息或选择您需要的选项。
2
查看结果
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3
下载或保存
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About this tool

Work out your estimated due date and how many weeks pregnant you are. Use the first day of your last period (adjusted for your cycle length) or the date of conception. You also see when the second and third trimesters start. Only about 5 percent of babies are born on the due date, so treat it as a guide, not medical advice.

When to use it

Estimate your due date from the first day of your last period or the date of conception.

Tips

Only about 5 percent of babies arrive on the due date. A dating scan gives a better estimate.

Privacy

Everything runs in your browser, so your data is not uploaded or stored.

获得最佳结果的提示

开始之前请花一点时间阅读选项，并先用一个小例子试用工具。一切都在您设备的浏览器中运行；您输入或添加的任何内容都不会被上传，关闭标签页会清除所有内容。如果看起来不对，请刷新页面重试，或使用本页的报告链接告诉我们出了什么问题。如果结果仍然看起来不对，请每次只更改一个值，看看哪个输入影响最大。如果您还会再用，请收藏此页。