Her Size Hub offers accurate and easy-to-use Bra Size Calculator, Period Calculator, Ring Size Calculator, and Women Shoe Size Calculator tools. Our mission is to help women measure, calculate, and shop with confidence using reliable sizing resources and measurement guides.
The Bra Size Calculator takes into account your band measurement, bust measurement, and others to determine what size bra you're likely to need.
While taking accurate measurements is the first step, there are also many factors that can make bra fitting a challenge due to breast shape, bra construction, fabric, brand sizing, and style. Take the result as a base line and always consult the size chart of the particular brand before doing the shopping.
Use the Bra Size Calculator to determine your size, or read through the Bra Size Guide to see how to measure.
The Period Calculator can be used to find out an approximation of the date of your next period from the cycle information entered.
The date of menstruation is a general prediction, but not an exact date as it is a normal variation. Factors such as changes in schedule, stress, and normal cycle changes may impact when your period occurs.
The calculator is to be used for general purposes of informing and tracking. Does not replace the advice, diagnosis or treatment of a trained medical practitioner.
Use the Ring Size Calculator to determine the size of your ring based on one of the measurements requested by the calculator or a finger measurement.
Measure carefully and multiple times for a more reliable result. Finger size can vary depending on the time of day, activity and temperature, and wider rings may not fit the same as narrow rings.
Once you have figured out your size, check this with the jeweler's sizing information before ordering.
Shoe sizes vary widely between brands and countries, making online shopping tricky. Our calculator converts your foot measurement into the right size for any region or brand.
Features:
When you are sizing a bra, there are two important measurements to consider: the area around the ribcage and the widest area of your bust. These measures can be used to approximate a band and cup size. To get the best performance: Measure with a flexible tape measure. Ensure that the tape is parallel and snug. Avoid pulling the tape excessively tight. Take measurements consistently. Please refer to manufacturer's size chart when ordering. Not all factors influencing the fit of a bra can be calculated on the calculator. The same size can fit differently depending on breast shape, cup construction, fabric, straps, or different brands. Read "How to Measure Bra Size" before using the Calculator, if you are not sure how to do your measurements.
A good ring should not be too tight or too loose. If you are purchasing jewelry online, measuring your finger at home will give you a good idea of what to buy.
To be more accurate, take into account the following:
Take several measurements.
Don't measure if fingers are abnormally cold or swollen.
Take into account the width of the ring you're planning to wear.
Discuss with the jeweler what sizing system they use.
Compare the size you get with the jeweler's size guide.
The difference in any measurement can make a difference when it comes to the fit of the ring, so don't rush the important purchase.
Use the Shoe Size Calculator/Guide to determine shoe sizes and find the correct shoe size.
One of the best criteria for shoe size is foot length, especially if you are buying shoes online.
Your feet may be slightly different sizes, measure both. If the manufacturer's direction allows, use the size of the larger foot to choose a size.
Remember sizes may vary from country to country and brand to brand. US women's shoe sizes do not correspond directly to UK or EU sizes, nor do they, necessarily, fit the same way in the shoe.
To get the optimal fit, first use the Shoe Size Calculator and then consult the size chart for the shoe you want to purchase.
While our calculators are some of the most popular resources on the site, Her Size Hub is about more than entering numbers and getting results. We also publish educational guides answering the questions women search for every day: How to measure bra size correctly at home Understanding bra size charts and conversions Ring sizing methods and fitting tips Shoe size conversions between countries Sleep calculators and bedtime planning Common sizing mistakes and how to avoid them.
We also provide educational guides that answer common questions women ask every day about sizing, measurements, comfort, and fit.
Learn how to measure your bra size correctly, understand cup and band sizing, and avoid common fitting mistakes.
Discover simple methods for measuring ring size at home and learn how international sizing systems compare.
Compare shoe size conversions, measure your feet correctly, and understand why sizing varies between brands.
Explore sleep calculators, bedtime planning guides, and helpful information about healthy sleep habits.
Every calculator and guide on Her Size Hub is designed to help solve real problems that many women experience.
These situations are more common than most people realize. That's why we focus on creating practical tools and educational content that help make sizing decisions easier and more informed.
Women visit Her Size Hub because they want practical answers without complicated explanations.
We understand that no sizing system is perfect. Different brands have different standards, and personal preferences can vary. Our goal is to provide reliable guidance that helps women make better decisions and feel more confident when shopping online.
The internet is full of conflicting sizing advice. One website may recommend one size while another suggests something completely different. This often leaves people feeling confused rather than informed.
Our mission is to simplify that experience by providing straightforward information, practical tools, and educational resources that are easy to understand and use.
We continuously review and improve our content so visitors can access helpful information that supports better sizing decisions.
While no calculator can guarantee a perfect fit for every brand or product, our tools are designed to provide useful guidance and help reduce common sizing mistakes.
Whether you're looking for your ideal bra size, checking a ring measurement, comparing shoe sizes, tracking your cycle, or improving your sleep routine, Her Size Hub is here to help. Explore our free calculators, browse our guides, and discover practical resources designed to make everyday sizing decisions easier and more confident.
Built on real measurement standards, reviewed regularly.
Reviewed against sizing charts from major global lingerie brands.
Teens, petites, plus size, pregnancy, post-surgery — it adapts to all shapes.
Step-by-step instructions so you measure correctly the first time.
Simple visuals & charts so your true size makes instant sense.
We don't require an account, and we explain exactly what we collect in our Privacy Policy.
No paywalls. No email gates. Just accurate sizing for everyone.
Her Size Hub is a free online platform offering accurate sizing and wellness tools, including a Bra Size Calculator, Period Calculator, Ring Size Calculator, and Women's Shoe Size Calculator.
It uses industry-standard measurement methods to estimate your ideal bra size. For best results, follow our measurement guide and compare results with the brand's own size chart.
Yes no account required.
It estimates your next period, fertile window, and ovulation days based on your cycle length and last period date.
It provides estimates only. Cycle lengths vary, so results shouldn't replace professional medical advice.
Use a measuring tape, string, or paper strip to measure finger circumference, then enter it into our Ring Size Calculator.
Yes — US, UK, EU, and other international standards.
Measure heel to toe, then enter the length for a size recommendation based on standard charts.
Yes, our calculator includes international conversions.
Different brands use different sizing standards and manufacturing specs. Always check the brand's official chart before purchasing.
Yes, completely free, no account needed.
Measure around your ribcage just below your bust for band size, then around the fullest part of your bust for cup size. Enter both into the calculator. For best accuracy, measure without a bra, or with a non-padded one.
Yes we don't store or share the measurements you enter. See our Privacy Policy for full details.
Yes, fully optimized for phones, tablets, and desktops.
Results are estimates. Measurement errors, brand differences, and body shape variation can all affect accuracy verify against official size charts when it matters.
Yes no data is stored, shared, or sold. Always consult a healthcare professional for medical concerns related to your cycle.
Yes, significantly, e.g., a US 34B is roughly a French 75B or German 80B. Our calculator includes these conversions.
Wrap a thin strip of paper or string around the base of your finger, mark the overlap, and measure in millimeters ideally at the end of the day when fingers are slightly larger. Enter the result for US/UK/EU sizes.
Shoe sizing isn't globally standardized, and even brands within a country use different lasts. Measure your foot length in centimeters and use our calculator for the most reliable result.
