ppm per °F to ppm per °C Converter
Quick answer: To convert ppm per °F to ppm per °C, multiply by 1.8. For example, 10 ppm/°F is 18 ppm/°C. One parts per million per °f equals 1.8 ppm/°C.
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Use the ppm per °F to ppm per °C Converter
ppm per °F to ppm per °C formula and what each symbol means
ppm/°C = ppm/°F × 1.8
| Symbol | Meaning |
|---|---|
| ppm/°F | Parts per million per °F |
| ppm/°C | Parts per million per °C |
ppm per °F to ppm per °C examples
1 ppm/°F
1 ppm/°F × 1.8 = 1.8 ppm/°C.
10 ppm/°F
10 ppm/°F × 1.8 = 18 ppm/°C.
100 ppm/°F
100 ppm/°F × 1.8 = 180 ppm/°C.
ppm per °F compared with ppm per °C
One ppm/°F is 1.8 times as large as one ppm/°C, so your number gets bigger when you convert ppm per °F to ppm per °C and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About ppm per °F and ppm per °C
Parts per million per °F (ppm/°F): Parts per million per Fahrenheit degree; as a unit it equals 1.8×10⁻⁶ per kelvin. Parts per million per °C (ppm/°C): Parts per million per Celsius degree, 1×10⁻⁶ per kelvin.
How to calculate ppm per °F to ppm per °C step by step
- Enter the value in ppm/°F (the starting unit).
- Multiply by 1.8, because 1 ppm/°F = 1.8 ppm/°C.
- The product is the value in ppm/°C. To go back, divide by 1.8 or multiply by 0.5555556.
Popular thermal expansion conversions
How to read your ppm per °F to ppm per °C result
A per-kelvin value equals the per-Celsius value, while a per-Fahrenheit value is 5/9 as large.
| PPM PER °F | PPM PER °C |
|---|---|
| 1 | 1.8 |
| 2 | 3.6 |
| 5 | 9 |
| 10 | 18 |
| 20 | 36 |
| 50 | 90 |
| 100 | 180 |
| 1,000 | 1,800 |
ppm per °C to ppm per °F: quick table
| PPM PER °C | PPM PER °F |
|---|---|
| 1 | 0.5555556 |
| 5 | 2.777778 |
| 10 | 5.555556 |
| 25 | 13.88889 |
| 50 | 27.77778 |
| 100 | 55.55556 |
| 250 | 138.8889 |
| 500 | 277.7778 |
Common mistakes when calculating ppm per °F to ppm per °C
- Mixing per-°C and per-°F values for the same material: the per-°F number is 5/9 of the per-°C number.
- Dividing when you should multiply: from ppm/°F to ppm/°C multiply by 1.8; from ppm/°C to ppm/°F divide by 1.8.
ppm per °F to ppm per °C FAQ
How many ppm/°C are in 1 ppm/°F?
1 ppm/°F equals 1.8 ppm/°C.
How many ppm/°F are in 1 ppm/°C?
1 ppm/°C equals 0.5555556 ppm/°F.
Is 1 ppm/°F = 1.8 ppm/°C an exact conversion?
The factor is shown rounded to 7 significant figures (1.8). The calculator above uses more digits.
What is a parts per million per °C (ppm/°C)?
Parts per million per Celsius degree, 1×10⁻⁶ per kelvin.
How can I estimate ppm per °F to ppm per °C in my head?
One ppm/°F is 1.8 times as large as one ppm/°C, so your number gets bigger when you convert ppm per °F to ppm per °C and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
What is 30 ppm/°F in ppm per °C?
30 ppm/°F = 54 ppm/°C (since 30 × 1.8).
What is 150 ppm/°F in ppm per °C?
150 ppm/°F = 270 ppm/°C (since 150 × 1.8).
What is 0.5 ppm/°F in ppm per °C?
0.5 ppm/°F = 0.9 ppm/°C (since 0.5 × 1.8).
How many decimals should I keep when converting ppm/°F to ppm/°C?
Match the precision of your original measurement. For example, 18 ppm/°C rounds to 18 ppm/°C at 3 significant figures; keep more digits only for engineering or scientific work.
More in Thermal Expansion converters
- Per Fahrenheit to ppm per °F Converter
- ppm per °C to Per Kelvin Converter
- Per Kelvin to Per Fahrenheit Converter
- ppm per °C to Per Fahrenheit Converter
- Per Kelvin to ppm per °C Converter
- Per Kelvin to ppm per °F Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)