There are several units of temperature used in the drilling industry and you sometimes need to convert one unit into another unit. So you need to know and be able to convert temperature from one unit to another temperature unit. This post demonstrates how to use temperature conversion formulas to convert one temperature unit to another unit.

**1 – Convert temperature from °Fahrenheit (F) to °Celsius (C)**

**°C = ((°F – 32) x 5) ÷ 9**

Example: Convert 80 °F to °C:

°C = ((80 – 32) x 5) ÷ 9

°C = 26.7

**2 – Convert temperature from ° Celsius (C) to °Fahrenheit**

**°F = (°C x 9) ÷ 5 + 32**

Example: Convert 30 °C to °F:

°F = (30 x 9) ÷ 5 + 32

°F = 86

**3 – Convert temperature from ° Celsius (C) to °Kelvin (K)**

**°K = °C + 273.16**

Example: Convert 30 °C to °K:

°K = 30 + 273.16

°K = 303.16

**4 – Convert temperature from °Fahrenheit (F) to °Rankine (R)**

**°R = °F + 459.69**

Example: Convert 150 °F to °R:

°R = 150 + 459.69

°R = 609.69

** The 1st and 2nd are the most frequently used in oil field.

** Please find the Excel sheet for converting temperature.**

**Ref books: **Lapeyrouse, N.J., 2002. Formulas and calculations for drilling, production and workover, Boston: Gulf Professional publishing.

Bourgoyne, A.J.T., Chenevert , M.E. & Millheim, K.K., 1986. SPE Textbook Series, Volume 2: Applied Drilling Engineering, Society of Petroleum Engineers.

Mitchell, R.F., Miska, S. & Aadny, B.S., 2011. Fundamentals of drilling engineering, Richardson, TX: Society of Petroleum Engineers.

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Useful formulas, but can you add the formulas for other rarely used temperature scales like Delisle or Reaumur ?