Period Calculator
Welcome to the all-new V-brand period calculator, here you will receive customized results and an interactive complete cycle view with calendar to better help you plan ahead.
Period Calculator
Let's see your potential future cycles. But hey, don't forget - the menstrual cycles are unpredictable!
- Menstruation
- Follicular
- Ovulation
- Luteal
Women’s cycles are unpredictable!
...But we can give our best guess.
Turn the wheel to see other day's results.
Select a different day to see results for that day in the cycle.
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Cycle day: / 28
You are in your menstrual phaseYou are in your follicular phaseYou are in your ovulatory phaseYou are in your luteal phaseDuring these days your body is shedding its uterine lining which shows up as menstrual bleeding. Listen to your body during this week, your oestrogen is lowest on the first day of this phase, so don’t be surprised if you have no energy!
Your body’s gearing up for ovulation, and rising oestrogen means you’ll likely feel energised, focused, and ready to take on the world.
One of your ovaries releases an egg, ready to travel through your fallopian tube toward the uterus, your cycle's big moment.
After ovulation, your body boosts progesterone, a hormone that supports in thickening your uterine lining. If the egg released in ovulation is not fertilised, the lining sheds which strats your cycle all over again.
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Chance of pregnancy: Low Medium to high Very high High to low
While it's technically possible, it's generally considered a "safe" time. But remember, "very low" isn't "zero"!
Early in this phase, which is during and right after your period, the chances are still low. However, as you get closer to ovulation, the chances start to climb.
Having unprotected sex in the 5 days leading up to ovulation, and on the day of ovulation itself, gives you the highest chance of conception.
Chances of becoming pregnant are high at the beginning of this phase as you have just ovulated but they decrease as you get closer to the end of the phase (which is also the end of your cycle)
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Next ovulation starts:
This is when your fertility window is really open, and chances are high of becoming pregnant.This is when your fertility window is really open, and chances are high of becoming pregnant.This is when your fertility window is really open, and chances are high of becoming pregnant.This is when your fertility window is really open, and chances are high of becoming pregnant. -
Next cycle starts:
You will have been through all the phases of your cycle by this point and you will start over again. Lets remember that each cycle can be and feel different but if you think there is something wrong speak with a doctor.You will have been through all the phases of your cycle by this point and you will start over again. Lets remember that each cycle can be and feel different but if you think there is something wrong speak with a doctor.You will have been through all the phases of your cycle by this point and you will start over again. Lets remember that each cycle can be and feel different but if you think there is something wrong speak with a doctor.You will have been through all the phases of your cycle by this point and you will start over again. Lets remember that each cycle can be and feel different but if you think there is something wrong speak with a doctor.
Your period is proof of your body doing something incredible
After your period ends, your body starts prepping for the next big event: Ovulation.
The main event of your cycle is here!
The second half of your cycle, it's all about "get ready... or reset"
Your uterus is saying goodbye to last month’s lining, that’s what causes bleeding. It’s totally normal, and it’s your body’s way of resetting for the next cycle.
Your brain is sending signals (via hormones) to your ovaries to grow tiny sacs called follicles. Inside each follicle is an egg, and one will become the star of the show later in your cycle.
This phase is short, just a day or so for one egg to be released from your ovaries.
Basically, it’s the two-week waiting room before your period decides to show up (or not!), often starring PMS as the uninvited, emotional guest.
Bleeding usually lasts 3–7 days, and hormones like estrogen and progesterone are at their lowest, mood swings? Totally normal. You might also notice cramps, bloating, headaches, or sore boobs. You might feel tired, crave comfort or want to curl up with your favorite playlist, that's OK, listen to your body. Hydrate, snack smart and take it easy when you need to.
This phase usually lasts about 7–10 days, you might notice your mood lifting, your skin looking clearer, and your energy coming back (Thanks oestrogen!). No cramps here (phew), but you might still have light spotting right after your period. It’s all part of the process. You will feel more energetic and upbeat compared to period days, use this energy boost to do things you love.
Around the middle of your cycle, a follicle that has formed in one of your ovaries releases an egg and it travels into the fallopian tube. Your body might give you little signs that ovulation is happening: you might notice clear, stretchy discharge (kind of like egg whites), ovulation cramps (twinges in your lower belly) and usually extra energetic. This is the phase when you're most likely to get pregnant if sperm is around, so understanding it matters, especially if you're not looking to become pregnant. This phase is short but your fertile window lasts a few days before and after it.
A hormone, called progesterone rises to support your uterus lining and oestrogen is still around. In case fertilisation of the egg doesn't happen then both hormones will drop toward the end of this phase. Those hormone changes can bring noticeable symptoms (Hello PMS!) You might feel bloated, tired, moody, your boobs might be sore, mild cramps or even skin changes. Cravings? Totally normal, your body's using extra energy. This phase ends when your period begins and then your cycle starts all over again.
Spin the wheel
Turn the outer ring to select another day and learn more about each phase!
Periods normally arrive once a month (every 28-30 days). But it isn’t an exact science. Predicting the precise date and length of your next period is sometimes tricky. Our new period calculator helps guiding you through some of this unpredictability by considering your complete cycle.
Your cycle is made of four phases, the menstrual phase, follicular phase, ovulation phase and luteal phase. Our tool helps you to navigate these phases, to know what to expect and when to expect it.
Remember you can use this tool in combination with a dedicated period tracker to make more accurate calculations based on a better understanding of your previous cycle lengths and durations of period.
We’re levelling up! Our brand-new Period Calculator is here, designed to be more interactive and insightful than ever. To continue innovating, some elements don’t fully meet all WCAG accessibility criteria yet. As inclusivity matters to us (information without barriers) we’re also providing access to our classic version right here for you, alongside our latest expert articles. Your cycle, your choice!