How does the Period Calculator work?

Estimate next period and cycle dates. The result is an estimate based on the values entered.

Is this calculator medical advice?

No. This calculator is for general education and should not replace advice from a qualified health professional.

Pregnancy

Estimate next period and cycle dates.

Last Period Date

Cycle Length (days)

Period Length (days)

Primary Result -

Secondary Result -

Additional Result -

Formula

Result is calculated from the entered values using a common health or fitness estimate formula.

These calculators provide estimates for general education and are not a substitute for professional medical advice.