# Celsius to Fahrenheit Converter URL: https://speedycalculator.com/calculators/conversion/celsius-to-fahrenheit/ Last updated: 2026-10-25 > Convert degrees Celsius to degrees Fahrenheit instantly. To convert Celsius to Fahrenheit, multiply by 9/5 (1.8) and add 32. ## Inputs - Degrees Celsius (°C) ## Results - Degrees Fahrenheit ## Formula ``` °F = °C × 9/5 + 32 ``` ## Explanation To convert Celsius to Fahrenheit, multiply by 9/5 (1.8) and add 32. A quick mental estimate is to double the Celsius value and add 30. ### How to use the Celsius to Fahrenheit Converter - Type the number of degrees Celsius into the **Degrees Celsius** field. Decimals such as 18.5 are fine. - Read the answer in **Degrees Fahrenheit** – it updates as you type, with no button to press. - To convert the other way, type into **Degrees Fahrenheit** and the degrees Celsius are recalculated. - Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion. This page converts only °C ⇄ °F. Need a different unit? Use the general temperature converter, where you can choose any “from” and “to” unit. ### How it works Degrees Celsius and degrees Fahrenheit use different zero points as well as different sized degrees, so this is not a simple multiplication: the calculator applies the formula °F = °C × 9/5 + 32, which first scales the value and then shifts it by the offset between the two zero points. Going back uses the inverse, °C = (°F − 32) ÷ 1.8. Results are calculated at full precision and rounded only for display, so typing into either field gives consistent values. ### How to convert degrees Celsius to degrees Fahrenheit - Start with the value in degrees Celsius: **37 °C**. - Apply the formula °F = °C × 9/5 + 32. - The result is **98.6 °F**. - To go back, use °C = (°F − 32) ÷ 1.8. ### °C to °F conversion table Degrees CelsiusDegrees FahrenheitDegrees FahrenheitDegrees Celsius-40 °C-40 °F0 °F-17.777778 °C-20 °C-4 °F32 °F0 °C-5 °C23 °F50 °F10 °C5 °C41 °F68 °F20 °C15 °C59 °F98.6 °F37 °C25 °C77 °F212 °F100 °C35 °C95 °F350 °F176.66667 °C38 °C100.4 °F50 °C122 °F150 °C302 °F200 °C392 °F250 °C482 °F ### What is a degree Celsius? The Celsius scale sets 0 °C at the freezing point and 100 °C at the boiling point of water at sea level. Since 2019 it is defined from the kelvin: °C = K − 273.15. ### What is a degree Fahrenheit? The Fahrenheit scale, proposed by Daniel Fahrenheit in 1724, puts water’s freezing point at 32 °F and boiling point at 212 °F. It is the everyday scale in the United States. ### Common mistakes to avoid Forgetting the offset (°f is not just °c × 1.8), converting temperature differences with the full formula (a change of 10 °c is a change of 18 °f, with no +32), and writing “degrees kelvin”. ## Worked example Inputs — Degrees Celsius: 37 °C. Results — **Degrees Fahrenheit = 98.6 °F**. ## FAQ **What is 37 °C in Fahrenheit?** 98.6 °F, typical body temperature. **What is a quick estimate?** Double the Celsius value and add 30. **How do I convert degrees Celsius to degrees Fahrenheit?** Use °F = °C × 9/5 + 32. For example, 37 °C = 98.6 °F. **How do I convert degrees Fahrenheit back to degrees Celsius?** Use °C = (°F − 32) ÷ 1.8, or type the value into the degrees Fahrenheit field above. **What is 10 °C in degrees Fahrenheit?** 10 °C = 50 °F. **What is 100 °C in degrees Fahrenheit?** 100 °C = 212 °F. **Is this conversion exact?** Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit. **Can I convert to other units on this page?** This page converts only between degrees Celsius and degrees Fahrenheit. To pick any temperature unit, use the general temperature converter linked under Related calculators. **What formula does the Celsius to Fahrenheit Converter use?** °F = °C × 9/5 + 32. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)