Rankine to Rømer Conversion: A Comprehensive Guide

The Rankine and Rmer scales are both absolute temperature scales, meaning they begin at absolute zero, the point where all molecular motion ceases. While less common than Celsius or Kelvin, understanding their conversions can be valuable in certain scientific and engineering applications.

Understanding the Rankine Scale

The Rankine scale, named after Scottish engineer William John Macquorn Rankine, is an absolute temperature scale where zero degrees Rankine (0 °R) corresponds to absolute zero. Notably, one degree Rankine is equivalent to one degree Fahrenheit.

Understanding the Rømer Scale

Developed by Danish astronomer Ole Rømer in 1701, the Rømer scale is an older historical temperature scale. It's an absolute scale, but its zero point is defined differently. On the Rømer scale, the freezing point of brine (a mixture of salt and water) is set at 0°Rø, and the boiling point of water is defined as 60°Rø.

Rankine to Rmer Conversion Formula

To convert Rankine to Rømer, we employ a two-step process:

  1. **Rankine to Fahrenheit:**

    Fahrenheit (°F) = Rankine (°R) - 459.67

  2. **Fahrenheit to Rømer:**

    Rømer (Rø) = (Fahrenheit (°F) + 32) * (7/24)

Rankine Rømer Rankine Rømer Rankine Rømer Rankine Rømer
1°R-135.61°Rø21°R-129.78°Rø41°R-123.95°Rø61°R-118.11°Rø
2°R-135.32°Rø22°R-129.49°Rø42°R-123.65°Rø62°R-117.82°Rø
3R-135.03°Rø23°R-129.20°Rø43°R-123.36°Rø63°R-117.53Rø
4°R-134.74°Rø24°R-128.90°Rø44°R-123.07°Rø64°R-117.24°Rø
5°R-134.45°Rø25°R-128.61°Rø45°R-122.78°Rø65°R-116.95°Rø
6°R-134.15°Rø26°R-128.32°Rø46°R-122.49°R66°R-116.65°Rø
7°R-133.86°Rø27°R-128.03°Rø47°R-122.20°Rø67°R-116.36°Rø
8°R-133.57°Rø28°R-127.74°Rø48°R-121.90°Rø68°R-116.07°Rø
9°R-133.28°Rø29°R-127.45°Rø49°R-121.61°Rø69°R-115.78°Rø
10°R-132.99°Rø30°R-127.15°Rø50°R-121.32°Rø70°R-115.49°R
11°R-132.70°Rø31°R-126.86°Rø51R-121.03°Rø71°R-115.20°Rø
12°R-132.40°Rø32°R-126.57°Rø52°R-120.74°Rø72°R-114.90°Rø
13°R-132.11°Rø33°R-126.28°Rø53°R-120.45°R73°R-114.61°Rø
14°R-131.82°Rø34R-125.99°Rø54°R-120.15°Rø74°R-114.32°Rø
15°R-131.53°Rø35°R-125.70°Rø55°R-119.86°Rø75°R-114.03°Rø
16°R-131.24°Rø36°R-125.40°R56°R-119.57°Rø76°R-113.74°Rø
17R-130.95°Rø37°R-125.11°Rø57°R-119.28°Rø77°R-113.45Rø
18°R-130.65°Rø38°R-124.82°Rø58°R-118.99°Rø78°R-113.15°Rø
19°R-130.36°R39°R-124.53°Rø59°R-118.70°Rø79°R-112.86°Rø
20°R-130.07°Rø40°R-124.24°Rø60°R-118.40Rø80°R-112.57°Rø