Delisle to Celsius (°De to °C) Converter
1 Delisle equals 99.3333 Celsius (1 °De = 99.3333 °C). Convert Delisle to Celsius with formula, table, and examples.
To convert Delisle to Celsius, subtract the Delisle value from 150 and multiply by 2/3. The Delisle scale runs in reverse, so this conversion 'un-reverses' it back to the familiar Celsius scale. This is needed when interpreting historical Russian temperature records from the 18th century.
How to Convert Delisle to Celsius
- Multiply Delisle by 2/3
- Subtract from 100
- Read the result in Celsius
Good to Know About Delisle to Celsius Conversion
Russian scientists used the Delisle scale for about 60 years (1732-1790). Historical climate research on 18th-century Russia requires understanding this backwards-running scale.
Delisle to Celsius: What You Need to Know
A Delisle reading of 120°De equals 20°C (room temperature). 150°De equals 0°C (freezing), and 0°De equals 100°C (boiling). Historical Russian meteorological data from the 1730s-1790s was recorded in Delisle and requires this conversion for modern climate studies.
What is a Delisle? °De
A historical inverted temperature scale invented by Joseph-Nicolas Delisle in 1732. Water boils at 0 °De and freezes at 150 °De. Higher numbers mean colder temperatures.
Learn more about Delisle →What is a Celsius? °C
A metric temperature scale where 0°C is the freezing point and 100°C is the boiling point of water. Used worldwide except in the US.
Learn more about Celsius →Going the other way? Use our Celsius to Delisle converter.
Delisle to Celsius FAQ
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The formula is: °C = 100 − °De × 2/3. For example, 120°De: 100 − 120 × 2/3 = 100 − 80 = 20°C.
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150°De equals exactly 0°C - the freezing point of water.
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0°De equals exactly 100°C - the boiling point of water. Remember, the Delisle scale runs backwards.
Non-Frequently Asked Questions About Delisle to Celsius
Questions nobody should ask - but someone did.
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No, though Joseph-Nicolas Delisle was French. He created his temperature scale in 1732 for Russian weather observations. The scale runs backwards: 0 is boiling, and higher numbers are colder. It is the only temperature scale optimized for Russian pessimism about winter.
Related Articles About Delisle to Celsius
Need the reverse? Use our Celsius to Delisle converter. See all Temperature converters.