CycleWise by The Fashion Engineer

Cycle Phase Calculator What phase of my cycle am I in, and what does it mean for me?

Know your phase. Plan your week.Energy, workouts, food and style for every phase, plus your key dates.

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  • 10-second answer
  • Nothing is saved

Find your phase

What phase am I in?

Enter the first day of your last period. We’ll show your phase today, what it means for you, and your upcoming dates.

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days

Most cycles are 21 to 35 days.

Your phase, energy, workout, food and style tips will appear here.

Estimates based on what you enter. Phases shift from cycle to cycle. Not for contraception.

The four phases

The 4 phases of your menstrual cycle

Day ranges below are for a typical 28-day cycle. Everyone is different, and how you feel matters more than the calendar.

Menstrual phase

Your period · about days 1–5

Your hormones are at their lowest and your uterus sheds its lining. Lower energy and cramps are common, so rest counts as productive.

  • Energy and mood: Often lower. It’s a good time to slow down and do less.
  • Workouts: Gentle walks, stretching, yoga or light Pilates. An easy session on the treadmill or walking pad still adds up.
  • Food: Warm, comforting meals and iron-rich foods like lean red meat, lentils and spinach, with vitamin C to help absorb the iron. Keep drinking water.
  • Style: Soft high-rise waistbands, darker bottoms and cozy layers. Comfort first.

Follicular phase

After your period · about days 6–12

Estrogen rises as your body prepares to ovulate. Many people feel more energetic, social and motivated.

  • Energy and mood: Rising. A great time to plan, start new things and say yes to plans.
  • Workouts: Try a new class, build strength or add more cardio. Your body often handles harder training well now.
  • Food: Fresh, colourful meals with plenty of fibre, and protein to support your workouts. Find your protein target.
  • Style: Experiment. Try that new trend, a brighter colour or a more fitted silhouette.

Ovulation phase

Mid-cycle · about days 13–15

An egg is released, usually about 14 days before your next period. Estrogen peaks, and many people feel their most confident. This is also your most fertile time.

  • Energy and mood: Often at its peak. Good days for big meetings, dates and photos.
  • Workouts: High-energy sessions like HIIT, running or heavier lifts, if you’re used to them. Warm up well.
  • Food: Lighter, fresh meals with fibre, berries and leafy greens, and plenty of water.
  • Style: Main-character energy. Statement pieces, bold colours and your favourite fitted looks.

Luteal phase

Before your period · about days 16–28

Progesterone rises, then both hormones fall if you’re not pregnant. Energy is steady at first, then PMS symptoms like bloating, cravings and mood changes can show up in the last week.

  • Energy and mood: Steady, then lower towards your period. Tiredness and wanting to stay in are common, so plan a little buffer time.
  • Workouts: Moderate strength, Pilates and steady incline walks. Ease off the intensity in the last few days if you feel flat.
  • Food: Complex carbs, protein at every meal to steady cravings, and magnesium-rich foods like nuts, seeds, leafy greens and dark chocolate. Go easy on salty foods if you feel bloated.
  • Style: Bloat-friendly outfits: relaxed waists, wrap dresses, flowy tops, stretchy fabrics and darker colours.

What is cycle syncing?

Cycle syncing means adjusting your workouts, food and plans to the phase of your cycle. The research on it is still limited, so think of it as a way to listen to your body, not a set of rules. If you feel great doing a hard workout on day 2, go for it.

What the calculator can’t tell you is exactly when you ovulate. We estimate it by counting back about 14 days from your next expected period. The time before ovulation varies the most, so if your cycles are irregular, your phases will shift too.

FAQ

Frequently asked questions

What phase of my cycle am I in?

Count from the first day of your last period. For a typical 28-day cycle, days 1 to 5 are the menstrual phase, days 6 to 12 the follicular phase, days 13 to 15 ovulation, and days 16 to 28 the luteal phase. Enter your dates in the calculator above for your own estimate.

What are the 4 phases of the menstrual cycle?

The menstrual phase (your period), the follicular phase (when estrogen rises), ovulation (when an egg is released) and the luteal phase (the time between ovulation and your next period).

How long is each phase?

The luteal phase is fairly steady for most people at around 12 to 14 days. Your period usually lasts 2 to 7 days. The follicular phase is the one that varies most, which is why longer or shorter cycles mostly change the time before ovulation.

Does the luteal phase make you tired?

It can. Progesterone rises after ovulation, and many people feel more tired, hungrier or less motivated in the week before their period. It’s common, and it usually eases once your period starts.

How do you feel during your follicular phase?

Many people feel more energetic, upbeat and social as estrogen rises after their period. It’s often a good time for harder workouts and new projects.

When are you skinniest in your cycle?

Your weight can shift by a few pounds across your cycle, mostly from water, not fat. Many people feel least bloated in the days after their period ends, during the follicular phase, and most bloated in the days before their period. Those changes are normal and temporary.

When is my next period?

Add your average cycle length to the first day of your last period. The calculator above shows your next period date along with your fertile window and PMS days.

Can I use this to avoid pregnancy?

No. Calendar estimates of ovulation and the fertile window are approximate and should not be used as contraception. Talk to a healthcare professional about reliable options.

How accurate is a cycle phase calculator?

It gives a good estimate if your cycles are fairly regular. It can’t detect your hormones or confirm ovulation, so treat the dates as a guide and pay attention to how you actually feel.

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CycleWiseA wellness tool by The Fashion Engineer

CycleWise provides estimates based on the information you enter and is intended for general educational purposes. Menstrual cycles can vary from person to person and from month to month. This tool does not diagnose medical conditions or replace advice from a qualified healthcare professional. Fertile-window estimates should not be used as contraception. Nothing you enter is saved or sent anywhere.