Most fertile:

Estimated due date:

Why we built Pregulator

We were tired of pregnancy-calculator sites that make you wade through pop-ups, create an account, or suck you into endless content, sometimes before you ever see a date. Pregulator is our antidote: a single, fast page with a free ovulation calculator and accurate due-date calculator that serve up the only numbers that matter—your fertility window and your baby’s due date—without tracking or sign-ups. No fluff, no paywalls, no slowdown. Just bookmark us, come back when you need the next pregnancy-timing calculation, and get on with your day.

• Private — everything runs in your browser.
• Free — no tiers, no gated features.
• Fast — loads in under 0.3 s on 4G.

Built with ❤️ by two friends who wanted a simpler way. Tell a friend—or just come back when you’re ready for the next milestone.