Menstrual Cycle Calculator

Predict your next few period start dates from your last period and cycle length.

First day of last period

Cycle length (days)

Next period

—

Then—

Estimate only. Confirm with your healthcare provider.

✉ Email me this result

</> Embed this calculator

Paste this into any website or blog post. It is free — the small "powered by" link must stay visible.

<iframe src="https://calculatorspoint.net/embed/menstrual-cycle-calculator/" style="width:100%;max-width:640px;height:560px;border:1px solid #e3e8ef;border-radius:12px;" loading="lazy" title="Menstrual Cycle Calculator"></iframe>

How it works

Next period = last period + cycle length

Frequently Asked Questions

How does the Menstrual Cycle Calculator work?

Predict your next few period start dates from your last period and cycle length.

Is this medical advice?

No. It gives general estimates only. For decisions about your health, speak with a qualified professional.