Do you weigh more on your period?
Yes, many people weigh more on their period, usually by about 1 to 5 pounds (0.5 to 2 kg). It's mostly water, not fat. Hormone shifts make your body hold onto fluid, and bloating, constipation and cravings add to it. Studies show fluid retention peaks around the first day of bleeding and drops within a few days as your period goes on.
Why the scale goes up
In the second half of your cycle, progesterone and estrogen affect hormones that control salt and water (like aldosterone). Your body holds on to more fluid, especially in the belly, breasts, hands and feet. Research tracking women across cycles found fluid retention was highest on the first day of the period, then fell over the following days.
- Water retention: the main reason, often worth a pound or a few.
- Bloating and gas: progesterone slows digestion; see bloating before your period.
- Constipation, then the [period poops](/questions/why-period-makes-you-poop): food in transit weighs something until it moves on.
- Cravings: extra salt and carbs make your body hold more water. Carbs are stored with water too.
- Skipped workouts: less sweat and movement on tired days.
When it peaks and when it drops
If you track your weight, compare the same cycle day each month, or weigh in during the week after your period ends, when water weight is usually lowest. Comparing a pre-period day to a mid-cycle day can show a gain that isn't real.
How to feel less puffy
- Drink enough water; dehydration makes the body hold more. More ideas in how to reduce period bloating.
- Go easy on very salty foods in the week before your period.
- Eat potassium-rich foods like bananas, potatoes, beans and leafy greens.
- Move gently: walking helps fluid and digestion.
- Sleep well; poor sleep feeds cravings.
It's easy to feel low when the scale jumps and your jeans feel tight, especially when PMS has already made you sensitive. Knowing it's temporary water, and that it'll likely be gone within a week, can take the sting out. For the week before your period, see why you gain weight before your period.
See a doctor if weight gain doesn't go away after your period, if you have swelling in your legs that stays, sudden weight gain with breathlessness, or ongoing bloating that lasts most days of the month. Persistent bloating, especially over 50, should always be checked.
Frequently asked questions
How much weight is normal to gain on your period?
Usually about 1 to 5 pounds (0.5 to 2 kg) of water. Some people notice less, some a bit more.
How long does period water weight last?
It usually starts to drop once bleeding starts and is gone within a few days to a week.
Do you burn more calories on your period?
Resting energy use rises slightly in the luteal phase, before your period, but studies find the difference is small. It doesn't cancel out the extra snacks cravings bring, and that's okay.
Sources
- White CP et al. Fluid retention over the menstrual cycle: 1-year data from the prospective ovulation cohort. Obstetrics and Gynecology International (2011)
- NHS: PMS (premenstrual syndrome)
- Office on Women's Health: Premenstrual syndrome (PMS)
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Why do I gain weight before my period?Why do you gain weight before your period? Water retention, slower digestion and cravings in the luteal phase. How much is normal and what helps it settle.Weight gain before your period: why the scale goes upWeight gain before your period is mostly water, not fat. Why the scale goes up by a kilo or two, when it drops again, and how to feel less puffy.Why am I bloated before my period?Why am I bloated before my period? Hormone shifts make your body hold water and slow your gut. Why it happens, how long it lasts and when to check it.How to reduce period bloating: 10 things that helpHow to reduce period bloating: less salt, more water, movement, fiber, potassium-rich foods and the right pain relief. Quick fixes and prevention.Period bloating: why it happens and how to ease itPeriod bloating explained: why your tummy swells before and during your period, how long it lasts, and simple, evidence-based ways to feel lighter.
What phase of my cycle am I in? Free phase finderWhat phase of my cycle am I in? Enter your last period to see your cycle day, today's phase and how people often feel in it. Private and instant.