Convert Kelvin to Rankine

To convert Kelvin to Rankine, use this direct formula:

• °R = K × 9/5
• Since 9/5 = 1.8, you can also write it as °R = K × 1.8

Kelvin (K) and Rankine (°R) are both absolute temperature scales, so there’s no adding or subtracting. You only multiply.

Example:

• 300 K × 1.8 = 540 °R

Write your final answer in Rankine (°R) for a correct Kelvin to Rankine conversion.

What is the Kelvin to Rankine conversion formula?

Use this formula to convert Kelvin to Rankine:

°R = K × 9/5

Since 9/5 equals 1.8, you can also write it as:

°R = K × 1.8

How do you convert Kelvin to Rankine step by step?

1. Start with the temperature in Kelvin (K).
2. Multiply the Kelvin value by 9/5 (or 1.8).
3. The result is the temperature in Rankine (°R).

Example: 300 K × 1.8 = 540 °R

Why does Kelvin convert to Rankine with a factor of 9/5?

Kelvin and Rankine both start at absolute zero, so there’s no offset to add or subtract. The only change is the size of the degree. A Rankine degree is the same size as a Fahrenheit degree, and a Kelvin is the same size as a Celsius degree. Since 1 °C = 1.8 °F, the Kelvin-to-Rankine factor is 9/5.

Is there an offset when converting Kelvin to Rankine?

No. Kelvin and Rankine are both absolute temperature scales. That means:

• 0 K = 0 °R
• You only multiply by 9/5 to convert.

What is absolute zero in Rankine and Kelvin?

Absolute zero is the lowest possible temperature.

• Absolute zero = 0 K
• Absolute zero = 0 °R

They match at the zero point because both are absolute scales.

How do you convert Rankine back to Kelvin?

To convert Rankine to Kelvin, divide by 9/5 (or 1.8):

K = °R × 5/9
K = °R ÷ 1.8

Example: 540 °R ÷ 1.8 = 300 K

What is 1 Kelvin in Rankine?

1 K = 1.8 °R

That means every 1 K change equals a 1.8 °R change.

What are common Kelvin to Rankine conversions?

Here are a few quick reference values:

• 0 K = 0 °R
• 100 K = 180 °R
• 273.15 K = 491.67 °R
• 300 K = 540 °R
• 373.15 K = 671.67 °R

How do you convert Kelvin to Rankine for scientific work?

Use the same formula:

°R = K × 9/5

Then round based on your need. Many lab values use 2 to 4 decimal places. For exact work, keep more decimals until the final step.

What’s the difference between Kelvin and Rankine?

Both are absolute temperature scales, but they use different degree sizes:

• Kelvin (K) uses the same step size as Celsius.
• Rankine (°R) uses the same step size as Fahrenheit.

So Kelvin-to-Rankine changes the scale size, not the zero point.

Do you write Rankine as °R or R?

Rankine is most often written as °R. In some technical writing, you may see R without the degree symbol. If you’re unsure, °R is the safest and most common form.

Can Kelvin ever be negative when converting to Rankine?

No. Kelvin can’t be negative because it starts at absolute zero. Since °R = K × 1.8, Rankine also can’t be negative.

What is 273.15 K in Rankine?

This is the Kelvin value for the freezing point of water.

273.15 K × 1.8 = 491.67 °R

So, 273.15 K = 491.67 °R.