Ring Sizer: Size Calculator

Ring Sizer: Size Calculator makes it simple to measure ring size at home, check your finger size, convert international ring sizes, and view a complete ring size chart in one easy app.

Need to find your ring size before buying a ring online or choosing a gift? Use the built-in ring sizer to measure a ring you already own, or measure your finger directly when you do not have a ring available. Adjust the on-screen circle until it matches the inside edge of your ring or fits your finger, then get your estimated ring size instantly.

💍 RING SIZER
Place a ring on your phone screen and adjust the measuring circle to match the inner edge. Fine-tune the diameter for a closer fit and view the calculated ring size.

☝️ FINGER SIZE MEASUREMENT
No ring? Use the finger sizer to estimate your finger size directly. Adjust the circle until it fits comfortably around your finger and check the corresponding ring size.

📏 RING SIZE CALCULATOR
Quickly calculate ring size from the measured inner diameter. View useful measurements such as ring diameter and circumference in a clear, easy-to-read result screen.

🔄 RING SIZE CONVERTER
Convert ring sizes between popular international standards. Enter a known size and instantly compare equivalent sizes across:
• US ring sizes
• UK / AU ring sizes
• EU / ISO ring sizes
• JP ring sizes

📊 RING SIZE CHART
Use the built-in ring size chart to compare ring size, inner diameter, and circumference. Switch between supported sizing systems and find the closest matching size without searching the web.

⭐ SAVE YOUR RING SIZES
Save measured ring sizes for later so you can quickly check your own size or keep measurements for future ring purchases.

⚙️ SIMPLE SETTINGS
Choose your preferred ring size system, show measurements in inches, switch themes, and recalibrate when needed for better measuring accuracy.

Ring Sizer: Size Calculator is useful for:
• Measuring ring size at home
• Checking finger size before ordering rings online
• Finding a ring size from inner diameter
• Comparing US, UK, EU, ISO, AU and Japanese ring sizes
• Converting one ring size standard to another
• Viewing ring diameter and circumference
• Saving ring measurements for later
• Finding the right size for engagement rings, wedding rings, fashion rings and gifts

For better results, measure carefully and make sure your phone display is correctly calibrated. Finger size can change slightly depending on temperature and time of day, so measuring more than once can help you choose a comfortable fit.

Whether you need a ring size calculator, ring measurement tool, finger size checker, ring size converter, or ring size chart, Ring Sizer: Size Calculator gives you the essential tools in one clean and convenient app.

Find your ring size, compare international sizes, save your measurements, and shop for rings with more confidence.

Recent changes:
Latest release of Ring Sizer: Size Calculator! 💍

• Measure ring size using a ring you already own
• Check finger size directly on your phone
• Calculate ring diameter and circumference
• Convert US, UK/AU, EU/ISO and JP ring sizes
• Browse a built-in ring size chart
• Save ring measurements for later
• Fine-tune measurements for a better fit
• Customize size system, units and theme

Find your ring size quickly with an easy ring sizer, ring size calculator, converter and size chart in one app.