Contraction Timer — Free Online Tool
Tap-to-time labor contractions · 5-1-1 rule indicator · privacy-first
Free contraction timer for labor. Tap to start + stop each contraction. Tracks duration, frequency, and 5-1-1 hospital-trigger rule. Data stays on your device.
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Contraction Timer (Labor)
A tap-to-time contraction tracker for labor. Tap when a contraction begins, tap again when it ends. The tool calculates contraction duration, frequency (start-to-start), and tracks the 5-1-1 rule — the common obstetric guideline that says contractions every 5 minutes, lasting 1 minute, sustained for 1 hour typically means it's time to head to your birth location. Data lives on your device only.
How the visualization works
The big counter shows the current state's time — during a contraction it counts the contraction duration; between contractions it counts time since the last contraction started (frequency). The bar chart shows up to 16 recent contractions, with bar height proportional to duration. The 5-1-1 panel turns green when all three criteria are met. The data persists in localStorage across page reloads for 24 hours.
How to use this tool
- 1
Tap when a contraction starts
When you feel a contraction begin, tap the big button. The timer starts counting the contraction duration.
- 2
Tap again when it ends
When the contraction stops, tap the button again. The duration is recorded.
- 3
Watch for the 5-1-1 rule
The dashboard tracks the 5-1-1 rule: contractions every 5 minutes, lasting 1 minute, for 1 hour. When this triggers, it's typically time to head to your birth location.
- 4
Data stays on your device
Contractions are saved in your browser only. Nothing is uploaded. Close the tab and reopen — your data is still there for 24 hours.
- 5
Reset when needed
Tap Reset to clear all data. There's a confirmation dialog so you can't lose data accidentally during labor.
Frequently Asked Questions
What is the 5-1-1 rule?
Is this medical advice?
What counts as a contraction?
Does my data leave the device?
How long is data kept?
Key Takeaways
- Contraction Timer is a free, browser-based calculator tool — tap-to-time labor contractions · 5-1-1 rule indicator · privacy-first.
- No signup, no downloads, no file uploads — your data stays on your device.
- Works on desktop, tablet, and mobile. Install as a PWA for offline access.
How to Use Contraction Timer
- Open the tool: Launch Contraction Timer on Toololis — no account or download needed.
- Enter your data: Paste text, enter values, or select a file directly in your browser.
- Get instant results: Everything is processed locally — results appear immediately.
- Copy or download: Save your output or share it. Bookmark for quick access next time.
Contraction Timer — Quick Facts
- Price
- Free — no limits, no watermarks, no paywalls
- Privacy
- 100% browser-based — no data is sent to any server
- Platform
- Any modern browser on desktop, tablet, or mobile
- Category
- Calculator Tools on Toololis
- Offline
- Works offline after first visit (Progressive Web App)
| Feature | Details |
|---|---|
| Tool | Contraction Timer |
| Category | Calculator |
| Signup Required | No |
| File Upload | None — processed in browser |
| Mobile Support | Fully responsive |
| Cost | Free forever |
Why Use Contraction Timer?
You should try Contraction Timer for a quick, private way to tap-to-time labor contractions · 5-1-1 rule indicator · privacy-first. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.
On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.