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

Delisle to Celsius Calculator.

Converts a temperature from the Delisle scale to Celsius. The Delisle scale is an obsolete temperature scale where water boils at 0 °De and freezes at 150 °De.

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 Delisle.

  2. 2

    Multiply the Delisle value by 2/3.

  3. 3

    Subtract that result from 100.

  4. 4

    The result is the temperature in degrees Celsius.

100 - delisle * 2 / 3

常见问题

What is the Delisle scale?

The Delisle scale (°De) is an obsolete temperature scale invented by Joseph-Nicolas Delisle in 1732. It is inverted: water boils at 0 °De and freezes at 150 °De.

How do I convert Celsius to Delisle?

Use the inverse formula: Delisle = (100 - Celsius) * 1.5. For example, 20 °C equals 120 °De.

Why is the Delisle scale inverted?

Delisle originally designed his thermometer with a glass tube that expanded when heated, so the scale was reversed. Later versions kept the inverted numbering.

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

33.333°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 Delisle scale to Celsius. The Delisle scale is an obsolete temperature scale where water boils at 0 °De and freezes at 150 °De.

  1. Enter the temperature in degrees Delisle.
  2. Multiply the Delisle value by 2/3.
  3. Subtract that result from 100.
  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。

Delisle to Celsius

°C = 100 - (°De × 2/3)

Since 150 °De corresponds to 0 °C and 0 °De to 100 °C, each degree Delisle equals 2/3 of a degree Celsius, and the scale is inverted.

Example:

Input: °De = 75

Calculation: 100 - (75 × 2/3) = 100 - 50

Result: 50 °C

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 Delisle to modern Celsius for comparison.

Example: A 1730s record of 50 °De equals 66.67 °C.

Educational demonstrations

Teach about temperature scales and their historical development.

Example: Show that 0 °De is boiling and 150 °De is freezing.

Literature and science fiction

Interpret temperatures mentioned in historical texts or fictional works that use the Delisle scale.

Example: A novel mentioning 120 °De corresponds to 20 °C.

提示与常见错误

Tips

  • Remember the scale is inverted: higher Delisle means lower Celsius.
  • For quick mental conversion, subtract 2/3 of the Delisle value from 100.
  • Use the formula °C = 100 - (°De × 2/3) for precise results.
  • Check your result: 0 °De should be 100 °C, and 150 °De should be 0 °C.

Common Mistakes to Avoid

  • Forgetting the inversion and adding instead of subtracting.
  • Using 3/2 instead of 2/3 as the conversion factor.
  • Confusing Delisle with other obsolete scales like Réaumur or Rankine.

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.