Pregnancy Due Date
Estimate your pregnancy due date from your last menstrual period.
Based on Naegele's rule (LMP + 280 days). Always confirm with your healthcare provider.
Estimate your pregnancy due date from your last menstrual period. Pregnancy Due Date is a free, browser-based tool in the Toolsnest health & fitness collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use the Pregnancy Due Date
- Open the Pregnancy Due Date in your browser — it loads instantly and works offline once cached.
- Enter your values in the input fields. Every field is labelled so you know exactly what to type.
- The result updates automatically as you type — there is no "submit" round-trip to a server.
- Adjust any input to compare scenarios and see how the outcome changes in real time.
- Copy or note the result. Nothing you enter is stored or sent anywhere.
Why use the Pregnancy Due Date?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your data are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full health & fitness suite, so related due date tasks are one click away.
Is it private and secure?
Your privacy is built in. The Pregnancy Due Date runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.
Frequently asked questions
Is the Pregnancy Due Date free to use?
Yes. The Pregnancy Due Date is completely free with no usage limits, no sign-up and no watermarks. Every feature is available to everyone.
Is my data sent to a server?
No. The Pregnancy Due Date works entirely inside your browser, so your data never leave your device. Nothing is uploaded, stored or shared.
Do I need to install anything or create an account?
No installation and no account are needed. Open the page in any modern browser and start using the Pregnancy Due Date straight away.
Does the Pregnancy Due Date work on mobile?
Yes. It is fully responsive and works in the browser on Android and iOS phones and tablets, as well as on desktop.
Will it work offline?
Once the page has loaded, the Pregnancy Due Date keeps working even if your connection drops, because all the processing runs on your device rather than on a server.