Ring Size Converter & Calculator Tool
Free online ring size converter and calculator tool. Convert and calculate ring sizes between US, UK, EU, Asian, Indian, and Italian/Swiss standards. Find your perfect ring size with measurement-based search and accurate calculations.
Whether you're shopping for engagement rings, wedding bands, or fashion jewelry, our converter helps you find the perfect fit across all international sizing standards using accurate finger measurements.
How to Use This Ring Size Converter
Step-by-Step Guide
- Choose Conversion Mode: Select between 'Size Conversion' mode for direct size conversion or 'Measurement Search' mode to find your size based on finger measurements.
- Enter Your Information: For size conversion: select your current ring size and region, then choose the target region. For measurement search: select the measurement type and enter your finger measurement.
- Get Results: Click 'Convert Size' or 'Find Matching Sizes' to see the conversion results. The converter will show exact matches and approximate matches with accuracy indicators.
- Verify the Fit: Use the converted size as a starting point. Consider trying on rings in the calculated size to ensure a proper fit, as sizes can vary between brands.
Pro Tips for Accurate Ring Sizing
- ✓Measure at Room Temperature: Fingers can swell in heat or shrink in cold. Measure when your hands are at normal room temperature for the most accurate results.
- ✓Measure the Correct Finger: Different fingers have different sizes. Always measure the specific finger where the ring will be worn.
- ✓Consider Ring Width: Wider rings fit tighter than narrow rings. If you're buying a wide band, you may need to size up slightly.
- ✓Account for Knuckle Size: If your knuckle is larger than the base of your finger, you may need to size up to ensure the ring can slide over the knuckle comfortably.
Size Conversion Mode:
Select your current ring size and region, then choose the target region to get the equivalent size.
Measurement Search Mode:
Enter your finger measurement (diameter or circumference) to find the closest matching ring sizes across all regions.
💡 Measurement Tips:
- • Use a soft measuring tape or string
- • Measure at the base of your finger where the ring will sit
- • Measure when your finger is at room temperature
- • For circumference: wrap the tape around your finger
- • For diameter: measure across the widest part of your finger
Understanding Ring Size Systems
Different countries have developed their own ring size systems over time. Understanding these differences is crucial for successful international jewelry shopping.
Ring Size System Differences:
Measurement Guide
Circumference Method:
- • Wrap measuring tape around your finger
- • Measure at the base where ring will sit
- • Keep tape snug but not tight
- • Use the measured length directly
Diameter Method:
- • Measure across the widest part of your finger
- • Or measure inner diameter of existing ring
- • Use calipers for precise measurement
- • Convert circumference: divide by 3.14 (π)
Measurement Tips:
- • Measure at room temperature
- • Avoid measuring when fingers are swollen
- • Measure multiple times for accuracy
- • Consider seasonal finger size changes
Frequently Asked Questions
How do I convert my ring size between different countries?
Use our ring size converter to switch between US, UK, EU, Asian, Indian, and Italian/Swiss standards. Simply select your current ring size and region, then choose the target region to get the equivalent size. You can also use the measurement search mode to find your size based on finger measurements.
What measurements do I need to find my ring size?
You can use either circumference or diameter measurements. For circumference, wrap a measuring tape around your finger and use that measurement. For diameter, measure across the widest part of your finger or use an existing ring's inner diameter. Our converter supports both inches and millimeters.
Are ring size conversions accurate?
Yes, our ring size conversions are based on standardized international measurements. However, slight variations may exist between brands due to different manufacturing standards. For the most accurate fit, we recommend trying on rings when possible or consulting with a jeweler.
How do I measure my finger for a ring?
Use a soft measuring tape or string to wrap around your finger at the base where the ring will sit. Make sure it's snug but not tight. Mark where the tape overlaps and measure the length. Measure when your hands are at room temperature for the most accurate results.