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此计算器目前以英文显示，翻译正在准备中。

单位转换

已验证计算器，公式透明

单位转换

Celsius to Rømer Converter.

Converts a temperature from degrees Celsius to degrees Rømer (°Rø), a historical temperature scale where 0°C equals 7.5°Rø and 100°C equals 60°Rø.

结果随输入实时更新。
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您的输入

工作原理

  1. 1

    Enter the temperature in degrees Celsius.

  2. 2

    Multiply the Celsius value by 21/40 (or 0.525).

  3. 3

    Add 7.5 to the result.

  4. 4

    The sum is the temperature in degrees Rømer.

celsius * 21 / 40 + 7.5

常见问题

What is the Rømer scale?

The Rømer scale, proposed by Ole Rømer in 1701, sets 0°Rø as the freezing point of brine and 60°Rø as the boiling point of water. It is now mostly of historical interest.

How do I convert Rømer back to Celsius?

Use the inverse formula: °C = (°Rø - 7.5) × 40/21. For example, 18°Rø equals (18 - 7.5) × 40/21 = 20°C.

Why is the conversion factor 21/40?

Because the Rømer scale divides the interval between 0°C and 100°C into 52.5 Rømer degrees (60 - 7.5 = 52.5). So 1°C = 52.5/100 = 21/40 °Rø.

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结果

公式已检查

Temperature in Rømer

18°Rø

询问任何问题

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工作原理

Converts a temperature from degrees Celsius to degrees Rømer (°Rø), a historical temperature scale where 0°C equals 7.5°Rø and 100°C equals 60°Rø.

  1. Enter the temperature in degrees Celsius.
  2. Multiply the Celsius value by 21/40 (or 0.525).
  3. Add 7.5 to the result.
  4. The sum is the temperature in degrees Rømer.

公式

此计算器背后的数学公式，供您核对结果。

Celsius to Rømer

°Rø = °C × 21/40 + 7.5

Multiply the Celsius temperature by 21/40 and add 7.5 to shift the zero point.

Example:

Input: °C = 20

Calculation: 20 × 21/40 + 7.5 = 10.5 + 7.5

Result: 18°Rø

实际应用场景

此计算在日常生活中的应用。

Historical temperature studies

Convert old scientific records or literature that use the Rømer scale to modern Celsius values.

Example: Reading a 1700s thermometer marked in Rømer.

Educational demonstrations

Teach students about the evolution of temperature scales and linear conversions.

Example: Comparing Celsius, Fahrenheit, and Rømer on a chart.

Curiosity and trivia

Satisfy curiosity about obscure units and how they relate to everyday temperatures.

Example: Finding out what room temperature is in Rømer.

提示与常见错误

Tips

  • Remember that 0°C is 7.5°Rø, not 0°Rø.
  • For quick mental estimates, multiply Celsius by 0.5 and add 7.5.
  • Use the inverse formula to check your conversion.
  • The Rømer scale is linear, so the conversion is straightforward.

Common Mistakes to Avoid

  • Forgetting to add the 7.5 offset.
  • Using 0.5 instead of 0.525 as the multiplier.
  • Confusing Rømer with Réaumur (which uses 80° for boiling).

假设与限制

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.