Multiply Temperatures | Temperature Ratio | Weather and Climate | Global Warming by CO₂

Temperature Ratio Calculator

Name: Temperature Ratio Calculator
Author: Jürgen Kummer

Calculates the ratio of two temperatures. The input can be made in degrees Celsius, degrees Fahrenheit or in Kelvin. The ratio is calculated from the values in Kelvin, because only the Kelvin scale has a true zero point that mathematically allows such a calculation.
Please enter temperature 1 and temperature 2 in any unit, or one temperature and the ratio. The other values will be calculated.

Example: 20 degrees Celsius is 1.0353 times warmer than 10 degrees Celsius. The obvious result that it is twice as much is incorrect.

Mathematically speaking, Kelvin is ratio-scaled, whereas degrees Celsius and Fahrenheit are only interval-scaled. The scale level is a property from statistics. In an interval scale, individual equal distances have the same characteristics, so just as much heat is added from 10 to 20 degrees Celsius as from 20 to 30 degrees Celsius. However, since 0 degrees Celsius is not a true zero point, no ratio can be formed, as calculating one leads to incorrect values that are meaningless. The Kelvin scale, on the other hand, has a true zero point. Temperature is the permanent, disordered movement of particles, the hotter the temperature, the faster, and at zero Kelvin there is no movement. So it cannot go any lower than 0 Kelvin, in fact, according to the third law of thermodynamics, this temperature can only be reached approximately and never exactly.

A temperature ratio is used, for example, for the Carnot efficiency. This describes how well heat can be converted into movement at best, and this works better the smaller the ratio of the lowest to the highest temperature of the combustion process. The Carnot efficiency is to a large part responsible for the inefficiency of combustion engines.

	Temperature 1	Temperature 2
°C
°F
K
Ratio T₁/T₂: