Conversions

Verified calculator with a transparent formula

Conversions

Delisle to Rankine Converter.

Converts a temperature from the Delisle scale to the Rankine scale.

Results update live as you type.
ƒ

Your inputs

How it works

  1. 1

    Enter the temperature in degrees Delisle.

  2. 2

    Multiply the Delisle value by 6/5.

  3. 3

    Subtract that product from 671.67.

  4. 4

    The result is the temperature in degrees Rankine.

671.67 - (delisle * 6 / 5)

Frequently asked questions

What is the Delisle scale?

The Delisle scale (°De) is an obsolete temperature scale where water boils at 0 degrees and freezes at 150 degrees. It decreases as temperature increases.

What is the Rankine scale?

The Rankine scale (°R) is an absolute temperature scale used in engineering, with zero at absolute zero. The freezing point of water is 491.67 °R and the boiling point is 671.67 °R.

How do I convert Delisle to Rankine manually?

Use the formula: °R = 671.67 - (°De × 6/5). For example, 100 °De equals 551.67 °R.

Explore this calculator category

ConversionsBrowse all

Results

Formula checked

Temperature in Rankine

0°R

Ask Anything

Estimate for general guidance only — verify important decisions with an appropriate professional.

How it works

Converts a temperature from the Delisle scale to the Rankine scale.

  1. Enter the temperature in degrees Delisle.
  2. Multiply the Delisle value by 6/5.
  3. Subtract that product from 671.67.
  4. The result is the temperature in degrees Rankine.

Formulas

The math behind this calculator, written out so you can verify the result.

Delisle to Rankine

°R = 671.67 - (°De × 6/5)

This formula converts a temperature from the Delisle scale to the Rankine scale by relating the two scales to the Celsius scale.

Example:

Input: °De = 100

Calculation: 671.67 - (100 × 6/5) = 671.67 - 120 = 551.67

Result: 551.67 °R

Real-world use cases

Where this calculation shows up in everyday life.

Historical temperature records

Convert old temperature readings recorded in Delisle to modern Rankine for comparison.

Example: A historical record of 50 °De converts to 611.67 °R.

Engineering calculations

When working with legacy data or equipment that uses Delisle, convert to Rankine for thermodynamic calculations.

Example: Convert 200 °De to 431.67 °R for use in heat transfer equations.

Educational exercises

Practice temperature scale conversions to understand the relationships between different scales.

Example: Convert -100 °De to 791.67 °R.

Tips and common mistakes

Tips

  • Remember that Delisle decreases as temperature increases, so higher Delisle values correspond to lower Rankine values.
  • Absolute zero on the Delisle scale is approximately 559.725 °De, which converts to 0 °R.
  • Use the formula °R = 671.67 - (°De × 6/5) for quick conversions.
  • Double-check your arithmetic, especially when dealing with negative Delisle values.

Common Mistakes to Avoid

  • Forgetting that the Delisle scale is inverted: higher Delisle means colder.
  • Using the wrong factor: the correct multiplier is 6/5, not 5/6.
  • Not accounting for the offset: the base is 671.67 °R, not 491.67 °R.

Assumptions and limitations

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