Ovulation Calculator
Calculate your ovulation date based on cycle length and last menstrual period.
The Ovulation Calculator below works out your result the moment you type — no sign-up, no cost. A quick, private way to check the numbers that matter to your health. Enter cycle length (days) and days since last period and the total updates live.
How the ovulation calculator works
Just fill in the fields above — cycle length (days) and days since last period — and the ovulation calculator does the maths instantly. Nothing is sent anywhere; the calculation happens right in your browser.
Want this ovulation calculator on your own site?
Add it free with RGT Quote Builder — a drag-and-drop WordPress calculator plugin with 100+ ready-made templates and no paywall.
FAQ
Is the ovulation calculator free?
Yes — completely free to use, with no account and no limits.
Can I add this ovulation calculator to my WordPress site?
Yes. Install the free RGT Quote Builder plugin, pick the Ovulation Calculator template, and drop it onto any page with a shortcode or block.
Can I customise the fields and pricing?
Absolutely — every field, price and formula is editable in the drag-and-drop builder.