The Galliera Temperature Scale (°G): Definition and Specification

Abstract

This record presents Version 1.1 of the Galliera Temperature Scale (°G), a Celsius-derived temperature scale designed for intuitive, human-scale communication of everyday temperatures. The Galliera scale was originally established and published by Joseph Galliera on 18 August 2026. Version 1.1 preserves the original definition unchanged and expands the specification to make explicit one of the scale’s principal design advantages: its greater whole-number granularity across ordinary human and terrestrial temperature ranges when compared with both Celsius and Fahrenheit. The Galliera scale is defined by the exact linear relationship T_G = 2T_C, where T_G is the numerical temperature expressed in degrees Galliera and T_C is the corresponding numerical temperature expressed in degrees Celsius. The scales share the same zero point, so 0 °G = 0 °C, while a temperature interval of 1 °G equals 0.5 °C, 0.5 K, or 0.9 °F. Conversion to Fahrenheit is therefore given by °F = 0.9 × °G + 32. Reference values include the freezing point of water at 0 °G, typical room temperature at approximately 40 °G, nominal human body temperature at approximately 74 °G, extreme outdoor heat at 100 °G = 50 °C = 122 °F, and the boiling point of water at 200 °G at standard atmospheric pressure. The scale was conceived to provide convenient whole-number values at common half-degree Celsius intervals. For example, 20.0, 20.5, 21.0, and 21.5 °C correspond to 40, 41, 42, and 43 °G. This changes the numerical representation of temperature rather than its physical precision. Version 1.1 further quantifies this representational property. Across the same physical temperature span of 0 to 40 °C, Celsius provides 40 one-degree intervals, Fahrenheit spans 72 one-degree intervals (32 to 104 °F), and Galliera provides 80 one-degree intervals (0 to 80 °G). Across 0 to 50 °C, the corresponding interval counts are 50 Celsius, 90 Fahrenheit, and 100 Galliera. Between the freezing and boiling points of water at standard atmospheric pressure, Celsius spans 100 intervals, Fahrenheit 180 intervals, and Galliera 200 intervals. Thus, under the specific design criterion of whole-number temperature representation, Galliera provides twice the granularity of Celsius and approximately 11.1% more whole-degree intervals than Fahrenheit across the same physical temperature span, while retaining the simple Celsius-derived zero point and a direct factor-of-two conversion. The Galliera scale is intended primarily for weather, indoor climate control, education, and other human-facing temperature communication. It is not proposed as a replacement for Kelvin in thermodynamics or as a claim of increased measurement accuracy or physical precision. This Version 1.1 document defines the scale, its mathematical relationship to established temperature scales, principal reference points, notation, design rationale, intended uses, limitations, and the expanded comparison of whole-number granularity with Celsius and Fahrenheit. Version 1.1 DOI: 10.5281/zenodo.22048681Original Version 1.0 DOI: 10.5281/zenodo.21999740