Luteal Phase Calculator
The luteal phase is the stretch between ovulation and your next period. This calculator estimates when it starts, when it ends, and how long it lasts.
The luteal phase is when progesterone rises, then drops if there is no pregnancy. A short luteal phase can affect how you feel and your cycle health, so it is worth knowing yours.
Sync your whole cycle, automatically
PhaseBloom builds your meals, workouts, and skincare around your exact cycle phase, day by day.
How it works
We anchor ovulation about 14 days before your next period, so your luteal phase runs from just after ovulation up to the day before your next period.
A typical luteal phase is 11–17 days. Consistently under about 10 days is worth discussing with a clinician.
Frequently asked questions
What is a healthy luteal phase length?
Usually 11 to 17 days. A luteal phase consistently shorter than about 10 days may affect cycle health and is worth raising with a clinician.
Why do I feel worse in my luteal phase?
As progesterone rises and then estrogen and progesterone both drop before your period, many people notice lower energy, cravings, bloating, and mood shifts. Magnesium-rich food, gentler workouts, and steady sleep help.