Celsius to Rømer Conversion Calculator: Free Online Tool
Convert degrees Celsius to degrees Rømer with our free online temperature converter.
Celsius to Rømer Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Celsius).
- The converted value in Rømer will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Temperature category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Celsius to Rømer
Temperature conversions like Celsius to Rømer use specific non-linear formulas.
Formula:
°Rø = °C × 21/40 + 7.5Example Calculation:
Convert 10°C: (10 × 21/40) + 7.5 = 12.75°Rø
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Celsius and a Rømer?
Degree Celsius (°C) is a unit of temperature on the Celsius scale, a temperature scale named after the Swedish astronomer Anders Celsius. It is one of the most common temperature scales used worldwide, particularly in science and in most countries for everyday measurements. The scale defines 0°C as the freezing point of water and 100°C as the boiling point of water at standard atmospheric pressure.
The Rømer scale (°Rø) is a historical temperature scale where the freezing point of water is set at 7.5 degrees and the boiling point at 60 degrees.
Note: The Celsius is part of the metric (SI) system, primarily used globally in science and trade. The Rømer belongs to the imperial/US customary system.
History of the Celsius and Rømer
The Celsius scale was developed by Anders Celsius in 1742. Originally, he proposed a scale where 0° represented the boiling point of water and 100° represented the freezing point. This scale was later inverted by Carl Linnaeus or Jean-Pierre Christin to the form we use today. The degree Celsius was adopted as part of the International System of Units (SI), where it is defined relative to the Kelvin scale (0°C = 273.15 K).
Invented by the Danish astronomer Ole Christensen Rømer in 1701. Rømer based his scale on two points: the freezing point of brine (0 °Rø) and the boiling point of water (60 °Rø). He later observed pure water froze at 7.5 °Rø. Daniel Fahrenheit visited Rømer and reportedly based his own scale on Rømer's work, multiplying the number of degrees by four.
Common Uses for degrees Celsius and degrees Rømer
Explore the typical applications for both Celsius (metric) and Rømer (imperial/US) to understand their common contexts.
Common Uses for degrees Celsius
- Weather: Everyday weather reporting and forecasting in most parts of the world.
- Domestic: Domestic temperature settings (thermostats, ovens).
- Science: Scientific research, especially in chemistry and biology, alongside Kelvin.
- Medical: Medical temperature measurements.
- Culinary: Food storage and cooking temperatures.
Common Uses for degrees Rømer
- Historical Significance: Primarily of historical interest as a precursor to the Fahrenheit scale.
- Not used in modern scientific or general applications.
Frequently Asked Questions
Questions About Celsius (°C)
Is Celsius the same as Centigrade?
Yes, 'Celsius' and 'Centigrade' refer to the same temperature scale. The name was officially changed to Celsius in 1948 to honor Anders Celsius and avoid confusion with 'centigrade' as an angular unit.
How does Celsius relate to Kelvin?
The Celsius scale is defined relative to the Kelvin scale, the SI base unit for temperature. A temperature difference of 1°C is equal to a difference of 1 K. To convert Celsius to Kelvin, add 273.15 (K = °C + 273.15).
Why is Celsius used so widely?
Its definition based on the freezing and boiling points of water at standard pressure makes it intuitive for everyday life and many scientific applications. It provides a convenient reference range for common environmental temperatures.
About Rømer (°Rø)
What are the freezing and boiling points of water in Rømer?
Water freezes at 7.5 °Rø and boils at 60 °Rø.
How did Rømer influence Fahrenheit?
Fahrenheit adopted Rømer's use of two reference points and expanded the scale, likely multiplying Rømer's degrees by 4 to avoid fractions and negative numbers for everyday temperatures.
How does Rømer relate to Celsius?
The relationship is °Rø = °C × 21/40 + 7.5.