rからkへの変換 (°R → K)

1 °R = 0.555556K. 測定カテゴリ間をスムーズに切り替え、リアルタイムで全単位マトリックスを計算し、瞬時に結果をコピーできます。

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温度 Converter

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Formula: --

⚡ All Temperature Scales

Real-time simultaneous conversions across standard thermodynamic and regional scales.

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Celsius

Metric standard (Water freezes at 0°, boils at 100°)

°C

-- °C

Fahrenheit

US customary scale (Water freezes at 32°, boils at 212°)

°F

-- °F

Kelvin

SI thermodynamic absolute zero reference

-- K

Rankine

Absolute thermodynamic scale using Fahrenheit increments

°R

-- °R

Réaumur

Historical scale (Water freezes at 0°, boils at 80°)

°Ré

-- °Ré

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Step-by-Step Mathematical Derivation

Verified SI Standard

➡️ Convert r to k

Value in K = Value in °R × 0.5555556

To convert any quantity from r to k, multiply the quantity by the constant conversion factor 0.5555556.

⬅️ Convert k to r (Inverse)

Value in °R = Value in K × 1.8

To reverse the operation, multiply your k figure by 1.8 (or divide by 0.5555556).

🔢 Step-by-Step Calculation Procedure:

Identify the starting value in r (°R).
Apply the exact linear conversion factor: 1 °R = 0.5555556 K.
Multiply the input value by 0.5555556 to obtain the exact measurement in k (K).
Verify precision against standard BIPM / NIST SP 811 statutory guidelines.

⚡

All-Units Instant Matrix

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c --

°C

f --

°F

k --

r --

°R

reaumur --

°Ré

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Temperature Reference Sheet

Standard SI Base Unit: 1 c

aiunitconverters.com

10/14/2026

Unit Name	Symbol	System	Equivalent in c
Celsius	°C	Standard	1 °C = 1 c
Fahrenheit	°F	Standard	1 °F = 0.5555555555555556 c
Kelvin	K	Standard	1 K = 1 c
Rankine	°R	Standard	1 °R = 0.5555555555555556 c
Réaumur	°Ré	Standard	1 °Ré = 1.25 c

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Academic & Research Citation Exporter

Cite this mathematical formula and conversion factor in research papers and wikis

BibTeX / APA / IEEE

@misc{ai_unit_converter_r_to_k,
  author       = {AI Unit Converters Standards Board},
  title        = {Exact r to k Conversion Factor and Mathematical Derivation},
  year         = {2026},
  howpublished = {\url{https://aiunitconverters.com/ja/temperature/r-to-k}},
  note         = {Derived from NIST Special Publication 811 and BIPM SI Brochure}
}

AI Unit Converters. (2026). r to k conversion formula & metric standard. Retrieved from https://aiunitconverters.com/ja/temperature/r-to-k

[1] AI Unit Converters Standards Board, "r to k conversion factor," 2026. [Online]. Available: https://aiunitconverters.com/ja/temperature/r-to-k. [Accessed: Oct 14, 2026].

\[ 1\text{ r} = \text{factor} \times 1\text{ k} \]

📊基準換算表

r (°R)k (K)

-40°R	-22.2222K
-20°R	-11.1111K
0°R	-0K
10°R	5.5556K
20°R	11.1111K
25°R	13.8889K
30°R	16.6667K
37°R	20.5556K
50°R	27.7778K
75°R	41.6667K
100°R	55.5556K
150°R	83.3333K
200°R	111.1111K
250°R	138.8889K
300°R	166.6667K
500°R	277.7778K

k (K)r (°R)

-40K	-72°R
-20K	-36°R
0K	0°R
10K	18°R
20K	36°R
25K	45°R
30K	54°R
37K	66.6°R
50K	90°R
75K	135°R
100K	180°R
150K	270°R
200K	360°R
250K	450°R
300K	540°R
500K	900°R