Diameter (mm) to JP Ring Size (Comfort Fit)

1 Diameter value = -12.971698 JP value · profile-dependent conversion · context: size system and fit profile

Direct Answer

1 Diameter value equals -12.971698 JP value

This result depends on the selected profile context: size system and fit profile.

For 4 Diameter value, this profile returns -9.433962 JP value.

Converter Calculator

1 Diameter (mm) value =
-12.971698 JP value

Explanation

Diameter (mm) converts to JP by normalizing to ring diameter in millimeters, then remapping to the target system. Fit profile fixed: Comfort Fit.

Diameter value to JP value is profile-bound here: the selected size system and fit profile controls the mapping used by calculator and reference table.

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Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.

Method & Reference (Verified)

  • Method basis: profile-bound mapping; constants depend on the selected profile encoded in the route.
  • Profile reference: size system and fit profile.
  • Consistency rule: keep the same profile in mirror direction to avoid mixing incompatible mappings.

Common Conversion Values

Diameter (mm) valueJP value
4 -9.433962
5 -8.254717
6 -7.075472
7 -5.896226
8 -4.716981
9 -3.537736
10 -2.358491
11 -1.179245
12 0
13 1.179245