Rankine ↔ Celsius Converter

Convert between Rankine and Celsius instantly

Rankine (°R)

Enter Rankine value to convert to Celsius

Celsius (°C)

Enter Celsius value to convert to Rankine

Conversion Result

491.67°R = 0°C

0°C = 32°F = 273.15K = 491.67°R

📚 Rankine ↔ Celsius Conversion Details

Rankine to Celsius Formula

°C = (°R - 491.67) × 5/9

To convert Rankine to Celsius, subtract 491.67, then multiply by 5/9.

Celsius to Rankine Formula

°R = (°C × 9/5) + 491.67

To convert Celsius to Rankine, multiply by 9/5, then add 491.67.

Bidirectional Conversion

This converter works both ways simultaneously:

Type in Rankine → Celsius updates automatically
Type in Celsius → Rankine updates automatically
No buttons to click - works as you type

Temperature Scales

Rankine: Absolute temperature scale (0°R = absolute zero)
Celsius: Common metric scale (0°C = water freezing)
Kelvin: Scientific absolute scale
Fahrenheit: US customary scale

📏 How This Converter Works

This is a bidirectional converter that works in real-time:

Rankine → Celsius: When you type in the Rankine field, the Celsius field automatically updates
Celsius → Rankine: When you type in the Celsius field, the Rankine field automatically updates
No swapping needed: Both conversions happen simultaneously
Real-time: Updates happen as you type, no button clicks required

// Bidirectional Conversion Logic:
celsius = (rankine - 491.67) × 5/9
rankine = (celsius × 9/5) + 491.67

// Example 1: Type "491.67" in Rankine
celsius = (491.67 - 491.67) × 5/9 = 0

// Example 2: Type "100" in Celsius
rankine = (100 × 9/5) + 491.67 = 671.67

📊 Conversion Table

Rankine (°R)	Celsius (°C)	Description
0°R	-273.15°C	Absolute zero
491.67°R	0°C	Water freezing point
671.67°R	100°C	Water boiling point
527.67°R	20°C	Room temperature
536.67°R	25°C	Warm day
558.27°R	37°C	Human body temperature

❓ Frequently Asked Questions

Q: What is the Rankine scale?

A: The Rankine scale is an absolute temperature scale using Fahrenheit degrees, where 0°R is absolute zero. 491.67°R equals 32°F (water freezing point).

Q: How does the bidirectional conversion work?

A: Both input fields work simultaneously. When you change the Rankine value, Celsius updates automatically. When you change the Celsius value, Rankine updates automatically. No swap button needed.

Q: Do I need to click any button to convert?

A: No! The conversion happens automatically as you type in either field.

Q: What's the difference between Rankine and Kelvin?

A: Both are absolute temperature scales, but Rankine uses Fahrenheit degrees (1°R = 1°F difference) while Kelvin uses Celsius degrees (1K = 1°C difference).

Q: How accurate is this converter?

A: This converter provides exact calculations up to 4 decimal places using precise conversion formulas.