Skip to content
Mathify
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

Rømer to Celsius Converter.

Converts a temperature from the Rømer scale to Celsius. The Rømer scale sets the freezing point of water at 7.5 °Rø and boiling point at 60 °Rø.

结果随输入实时更新。
ƒ

您的输入

工作原理

  1. 1

    Enter the temperature in degrees Rømer.

  2. 2

    Subtract 7.5 from the Rømer value.

  3. 3

    Multiply the result by 40/21 to get Celsius.

  4. 4

    The result is the temperature in degrees Celsius.

(roemer - 7.5) * (40 / 21)

常见问题

What is the Rømer scale?

The Rømer scale is a temperature scale proposed by Danish astronomer Ole Rømer in 1701. It sets the freezing point of water at 7.5 degrees and the boiling point at 60 degrees.

How do I convert Celsius to Rømer?

Use the inverse formula: Rømer = Celsius * (21/40) + 7.5. For example, 20°C equals 20 * 0.525 + 7.5 = 18 °Rø.

Is the Rømer scale still used today?

No, it is largely obsolete. It is mainly of historical interest, as it influenced the development of the Fahrenheit scale.

浏览此计算器类别

单位转换浏览全部

结果

公式已检查

Temperature in Celsius

0°C

询问任何问题

估算仅供参考——重要决策请咨询专业人士。

工作原理

Converts a temperature from the Rømer scale to Celsius. The Rømer scale sets the freezing point of water at 7.5 °Rø and boiling point at 60 °Rø.

  1. Enter the temperature in degrees Rømer.
  2. Subtract 7.5 from the Rømer value.
  3. Multiply the result by 40/21 to get Celsius.
  4. The result is the temperature in degrees Celsius.

公式

此计算器背后的数学公式，供您核对结果。

Rømer to Celsius

°C = (°Rø - 7.5) × 40/21

The Rømer scale has 52.5 degrees between freezing and boiling of water (60 - 7.5), while Celsius has 100 degrees. So each Rømer degree equals 100/52.5 = 40/21 Celsius degrees.

实际应用场景

此计算在日常生活中的应用。

Historical temperature records

Convert old temperature readings recorded in Rømer to modern Celsius for comparison.

Example: A 1700s weather log shows 10 °Rø, which is about 4.76 °C.

Educational demonstrations

Teach students about the evolution of temperature scales and conversions.

Example: Show that 0 °Rø is about -14.29 °C.

Scientific research

When working with historical scientific papers that use Rømer, convert to Celsius for consistency.

Example: Convert 30 °Rø to 42.86 °C.

提示与常见错误

Tips

  • Remember the freezing point of water is 7.5 °Rø, not 0.
  • The conversion factor is 40/21 ≈ 1.90476.
  • For quick mental estimates, multiply the Rømer value by 2 and subtract 15 to get approximate Celsius.
  • Use a calculator for precise conversions, especially for non-standard values.

Common Mistakes to Avoid

  • Forgetting to subtract 7.5 before multiplying.
  • Using the wrong conversion factor (e.g., 21/40 instead of 40/21).
  • Confusing Rømer with Réaumur, which has different freezing and boiling points.

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.