Newton Scale to Celsius Converter

°N

°C

Common Conversions

°N	°C
-90.14	-273.15
-33	-100
-13.2	-40
0	0
6.6	20
8.25	25
12.21	37
16.5	50
33	100
66	200
165	500
330	1000

Why this conversion matters in chemistry

Reading Newton's original chemistry notebooks or the earliest Royal Society thermochemistry papers runs into this conversion routinely. A reported 12 °N corresponds to 36.4 °C — the rescaling that places Newton's heats of mixing and cooling-curve data onto the modern Celsius axis for direct comparison with post-Lavoisier thermochemistry. The ratio of 100/33 °C per °N reflects the difference in degree size: Newton chose 33 degrees for the freezing and boiling water range, where Celsius later chose 100. The conversion lives only in historical-document interpretation; modern chemistry never sees the Newton scale outside that context.

Formula

°C = °N × 100/33

Worked Examples

0°N = 0°C

Water's freezing point — the shared zero of both scales.

33°N = 100°C

Water's boiling point on the Newton scale — the calibration anchor.

8.25°N = 25°C

Standard thermodynamic reference temperature in Newton degrees.

12.21°N = 37°C

Human body temperature — for any biochemistry benchmark on the historical scale.

Frequently Asked Questions

How do I convert Newton scale to Celsius?

Multiply the Newton value by 100/33 (about 3.0303). So 33 °N × 100/33 = 100 °C — water's boiling point in modern units.

What is 33 °N in Celsius?

Exactly 100 °C — water's boiling point at standard atmospheric pressure, the calibration anchor of the Newton scale.

Are Newton degrees larger or smaller than Celsius?

Newton degrees are larger by a factor of 100/33 ≈ 3.03. The freezing and boiling water span spans 33 Newton degrees but 100 Celsius degrees, so each Newton degree covers about 3 °C.

Where might I see Newton-scale temperatures?

Only in historical scientific documents from the early 18th century. Newton published his scale anonymously in 1701; modern chemistry uses Celsius and Kelvin almost exclusively. The conversion lives in archive interpretation, not contemporary practice.