Convertisseur de Taille de Bague Gratuit
Convertissez les tailles de bague entre les systèmes français, américain, britannique et japonais. Trouvez votre taille de bague.
Inner Diameter (mm)
14.9 mm
Formule
Ring Size Conversion
Ring sizes vary by country. The US system uses numbers (typically 3-16), while the UK uses letters and EU uses circumference in mm minus 40.
Approximate Formula
Diameter (mm) = 11.63 + (US Size - 3) x 0.814
Circumference = Diameter x pi
EU Size = Circumference - 40
Quick Reference
Exemple Résolu
Convert US size 7 to other systems.
- 01Diameter = 11.63 + (7-3) x 0.814 = 14.886 mm
- 02Wait, let me recalculate: 11.63 + 4 x 0.814 = 14.886 mm
- 03Circumference = 14.886 x pi = 46.76 mm
- 04EU size = 46.76 - 40 = ~7
Questions Fréquentes
How do I measure my ring size?
Wrap a thin strip of paper around your finger, mark where it overlaps, and measure the length in mm. This is the circumference. Divide by pi for diameter, then use a size chart.
Do ring sizes differ by width?
Yes. Wider bands fit tighter, so you may need a half-size to full-size larger for bands wider than 6mm compared to standard 2-4mm bands.
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