---
title: Free PMS, Period and Cycle Calculators | Niyora
description: Free tools for PMS and your cycle: a PMS calculator, period calculator, luteal phase and ovulation calculators, and a PMS and PMDD self-check.
url: https://niyora.com/tools/
---

- [Niyora](https://niyora.com/)
- Tools

Free tools

# See your cycle coming.

Calculators for your PMS window, next period, luteal phase and ovulation.

PMS calculator: see when your hard days start

Enter the first day of your last period. You’ll see your PMS window, your next period and your luteal phase for the next three cycles, before they arrive.

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Period calculator: when is my next period?

Your next three periods, ovulation and PMS window, from the first day of your last period and your usual cycle length.

Open

Luteal phase calculator

The luteal phase runs from the day after ovulation to the day before your period. See your dates for the next three cycles.

Open

Ovulation calculator: when do I ovulate?

An estimate of your ovulation day for the next three cycles, about 14 days before each period, plus the luteal phase and PMS window that follow.

Open

PMS and PMDD self-check

Two minutes, eleven questions. See how your premenstrual week actually hits.

Open