Celsius to Rømer (°C to °Rø) Converter
1 Celsius equals 8.025 Rømer (1 °C = 8.025 °Rø). Convert Celsius to Rømer with formula, table, and examples.
To convert Celsius to Rømer, multiply by 21/40 and add 7.5. The Rømer scale, devised by Danish astronomer Ole Rømer around 1701, sets the freezing point of water at 7.5°Rø and boiling at 60°Rø. It is historically significant as the direct ancestor of the Fahrenheit scale.
How to Convert Celsius to Rømer
- Multiply Celsius by 21/40
- Add 7.5
- Read the result in Rømer
Common Celsius to Rømer Conversions
| Celsius (°C) | Rømer (°Rø) | Status |
|---|---|---|
| -40 °C | -13.5 °Rø | |
| -20 °C | -3 °Rø | |
| -10 °C | 2.25 °Rø | |
| 0 °C | 7.5 °Rø | |
| 5 °C | 10.13 °Rø | |
| 10 °C | 12.75 °Rø | |
| 15 °C | 15.38 °Rø | |
| 20 °C | 18 °Rø | |
| 25 °C | 20.63 °Rø | |
| 30 °C | 23.25 °Rø | |
| 36 °C | 26.4 °Rø | |
| 37 °C | 26.93 °Rø | |
| 40 °C | 28.5 °Rø | |
| 50 °C | 33.75 °Rø | |
| 60 °C | 39 °Rø | |
| 80 °C | 49.5 °Rø | |
| 100 °C | 60 °Rø | |
| 150 °C | 86.25 °Rø | |
| 180 °C | 102 °Rø | |
| 200 °C | 112.5 °Rø | |
| 220 °C | 123 °Rø | |
| 250 °C | 138.75 °Rø | |
| 300 °C | 165 °Rø | |
| 500 °C | 270 °Rø | |
| 1,000 °C | 532.5 °Rø |
Good to Know About Celsius to Rømer Conversion
The Rømer scale is one of the most important 'forgotten' temperature scales in history. Without Rømer's work inspiring Fahrenheit, the US might use a completely different temperature system today.
Celsius to Rømer: What You Need to Know
Room temperature of 20°C equals 18°Rø. Body temperature (37°C) is about 26.9°Rø. The young Daniel Gabriel Fahrenheit visited Rømer in 1708 and adopted his approach, multiplying the scale by 4 to eliminate the 7.5° freezing point fraction.
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 →What is a Rømer? °Rø
A temperature scale proposed by Ole Christensen Rømer in 1701. Water freezes at 7.5 °Rø and boils at 60 °Rø. It influenced Fahrenheit's scale development.
Learn more about Rømer →Going the other way? Use our Rømer to Celsius converter.
Celsius to Rømer FAQ
-
The formula is: °Rø = °C × 21/40 + 7.5. For example, 20°C: 20 × 21/40 + 7.5 = 18°Rø.
-
0°C equals 7.5°Rø. Rømer chose this value because he wanted brine (saltwater ice) to be 0° and boiling water to be a round 60°.
-
Fahrenheit visited Rømer in 1708 and essentially multiplied Rømer's scale by 4 to get whole numbers. Rømer's 7.5° freezing point became Fahrenheit's 32° (7.5 × 4 = 30, adjusted to 32).
Non-Frequently Asked Questions About Celsius to Rømer
Questions nobody should ask - but someone did.
-
Partly. Fahrenheit visited Romer's laboratory in 1708 and was inspired by his temperature measurement work. Fahrenheit then improved on Romer's scale by using mercury instead of alcohol. Romer set 0 at brine freezing and 60 at water boiling. Fahrenheit multiplied by 4 and adjusted. Science builds on science.
Related Articles About Celsius to Rømer
Need the reverse? Use our Rømer to Celsius converter. See all Temperature converters.