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Celsius to Fahrenheit Converter

Quickly convert temperatures between Celsius and Fahrenheit, with Kelvin available for scientific contexts.

Formula shown0 inputs definedUpdated Nov 2025By CalcuTotal TeamFree, no sign-up

Quick Summary

Use this when you need:

Convert cooking temperatures from °C ovens to °F recipes
Explain weather data to audiences that expect the other scale
Check firmware that reports °F while UI needs °C

You’ll get:Temperature

How this is calculated

Formula:

°F = °C × 9/5 + 32

In plain language:

Celsius and Fahrenheit are affine scales. Multiply Celsius by 9/5 and add 32 to get Fahrenheit; subtract 32 and multiply by 5/9 to return Celsius. Kelvin stays 273.15 higher than Celsius.

The formula is always visible so you can verify the math and explain your numbers to anyone who asks.

What these terms mean

Temperature

Temperature used in the calculation.

When to use this calculator

Convert cooking temperatures from °C ovens to °F recipes
Explain weather data to audiences that expect the other scale
Check firmware that reports °F while UI needs °C

Last updated: November 22, 2025

Celsius to Fahrenheit converter explained

Switching recipes, HVAC specs, or firmware readouts between Celsius and Fahrenheit takes a single linear formula. This guide keeps the math visible and includes Kelvin for absolute reference.

How the conversion works

Forward direction:

\text{°F} = \text{°C} \times \tfrac{9}{5} + 32

Reverse direction:

\text{°C} = (\text{°F} - 32) \times \tfrac{5}{9}

Kelvin is offset from Celsius by 273.15:

K = \text{°C} + 273.15

Units and conversions

Scale	Symbol	Relation
Celsius	°C	base in this view
Fahrenheit	°F	°F = °C × 9/5 + 32
Kelvin	K	K = °C + 273.15

Worked examples

Pizza oven preheat Given 180 °C:
$\text{°F} = 180 \times \tfrac{9}{5} + 32 = 356\,\text{°F}$
Result: 356 °F.
Room thermostat check Reading 68 °F from a wall unit:
$\text{°C} = (68 - 32) \times \tfrac{5}{9} = 20.0\,\text{°C}$ $K = 20.0 + 273.15 = 293.15\,\text{K}$
Result: 20.0 °C, 293.15 K.

Tips and pitfalls

Fahrenheit has a larger degree size; expect fewer degrees between the same temperature bounds.
When debugging sensors, confirm whether firmware reports °C or °F before applying offsets.
Use two decimals for lab work; whole numbers are fine for daily weather.

References and further reading

Frequently Asked Questions

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Calculator info

Version:: v1.0.0
Last reviewed:: Nov 22, 2025
Sensitivity:: low
References:: 1

Last updated: November 22, 2025

Celsius to Fahrenheit converter explained

Switching recipes, HVAC specs, or firmware readouts between Celsius and Fahrenheit takes a single linear formula. This guide keeps the math visible and includes Kelvin for absolute reference.

How the conversion works

Forward direction:

\text{°F} = \text{°C} \times \tfrac{9}{5} + 32

Reverse direction:

\text{°C} = (\text{°F} - 32) \times \tfrac{5}{9}

Kelvin is offset from Celsius by 273.15:

K = \text{°C} + 273.15

Units and conversions

Scale	Symbol	Relation
Celsius	°C	base in this view
Fahrenheit	°F	°F = °C × 9/5 + 32
Kelvin	K	K = °C + 273.15

Worked examples

Pizza oven preheat Given 180 °C:
$\text{°F} = 180 \times \tfrac{9}{5} + 32 = 356\,\text{°F}$
Result: 356 °F.
Room thermostat check Reading 68 °F from a wall unit:
$\text{°C} = (68 - 32) \times \tfrac{5}{9} = 20.0\,\text{°C}$ $K = 20.0 + 273.15 = 293.15\,\text{K}$
Result: 20.0 °C, 293.15 K.

Tips and pitfalls

Fahrenheit has a larger degree size; expect fewer degrees between the same temperature bounds.
When debugging sensors, confirm whether firmware reports °C or °F before applying offsets.
Use two decimals for lab work; whole numbers are fine for daily weather.

Quick Summary

Calculator Tool

How this is calculated

What these terms mean

Temperature

When to use this calculator

Celsius to Fahrenheit converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Calculator info

Celsius to Fahrenheit converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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