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📋 Kelvin to Newton Reference Quick conversion guide
Key Temperatures
Absolute Zero (K)0 K = −33 °N
Water Freezes (K)273.15 K = 0 °N
Room Temperature293.15 K ≈ 6.6 °N
Water Boils (K)373.15 K = 33 °N
Conversion Formula
°N = (K − 273.15) × 33/100
or °N = (K − 273.15) ÷ 3.0303
Newton Scale Historical scale (1701)
Unit Symbol °N
Proposed By Isaac Newton
Relationship to Celsius 0 °N = 0 °C, 33 °N ≈ 100 °C
Note: The Newton scale shares the same zero point as the Celsius scale (the freezing point of water), but each Newton degree is equivalent to 100/33 ≈ 3.03 Kelvin (or degrees Celsius).

What Is the Newton Scale?

The Newton scale was proposed by Isaac Newton in 1701 and is one of the earliest objective temperature scales in the history of thermometry. Newton set the freezing point of water at 0 degrees and the boiling point of water at 33 degrees, making it a direct precursor to the Celsius scale.

Key characteristics of the Newton scale:

  • Zero point: 0 °N = the freezing point of water (0 °C, 273.15 K).
  • Boiling point: 33 °N = the boiling point of water (100 °C, 373.15 K).
  • Unit size: 1 Newton degree ≈ 3.03 Kelvin (or degrees Celsius).
  • Conversion formula: °N = (K − 273.15) × 33/100.

Newton used linseed oil as his thermometric fluid, measuring its volume changes with temperature to calibrate his thermometer. The scale is now obsolete for everyday use but remains of historical interest in science and engineering.

How to Convert Kelvin to Newton

The formula to convert Kelvin to Newton degrees is:

°N = (K − 273.15) × 33/100

or °N = (K − 273.15) ÷ 3.0303

This formula works because:

  • Subtracting 273.15 converts Kelvin to Celsius (since 0 °C = 273.15 K).
  • Multiplying by 33/100 converts Celsius to Newton degrees (since 100 °C = 33 °N).

For example, to convert 373.15 K (the boiling point of water) to Newton degrees:

°N = (373.15 − 273.15) × 33/100

°N = 100 × 33/100

°N = 33 °N

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❓ Kelvin to Newton FAQ

What is the formula to convert Kelvin to Newton degrees?

The formula is °N = (K − 273.15) × 33/100. You can also use °N = (K − 273.15) ÷ 3.0303.

What is the Newton scale used for?

The Newton scale was proposed by Isaac Newton in 1701 and is one of the earliest objective temperature scales. It is primarily of historical and scientific interest today.

What is the relationship between the Newton and Celsius scales?

The Newton scale is a direct precursor to the Celsius scale. Both share the same zero point (the freezing point of water = 0 °N = 0 °C), but the boiling point of water is 33 °N on the Newton scale and 100 °C on the Celsius scale.

What is absolute zero in Newton degrees?

Absolute zero (0 K) is approximately −33 °N (more precisely, −90.14 °N, but often simplified to −33 °N).

What is the freezing point of water in Newton degrees?

The freezing point of water (273.15 K, 0 °C) is 0 °N.

What is the boiling point of water in Newton degrees?

The boiling point of water (373.15 K, 100 °C) is 33 °N.

Who invented the Newton scale?

The Newton scale was invented by Sir Isaac Newton (1643–1727) in 1701.

Is the Newton scale still used today?

The Newton scale is largely obsolete for everyday use but is still referenced in historical studies and certain engineering contexts.

How accurate is this converter?

This converter provides highly accurate results using the standard formula °N = (K − 273.15) × 33/100. You can adjust the decimal precision to suit your needs.

Is this converter free?

Yes, this converter is completely free to use. No registration or personal data storage is required.