Instant Conversions

Temperature Converter

Q: How to convert from Celsius to Fahrenheit?

To convert from Celsius to Fahrenheit, use the formula F = (C × 9/5) + 32.

Q: What is the temperature of absolute zero?

Absolute zero is equivalent to 0 K, -273.15 °C, or -459.67 °F.

Q: When to use Kelvin instead of Celsius?

Kelvin is the standard scale for science and engineering, as it is an absolute scale that avoids negative numbers in thermodynamic calculations.

Q: Does the converter work with negative temperatures?

Yes, the tool accepts and converts negative temperatures in Celsius and Fahrenheit to all other scales.

Quickly convert between Celsius, Fahrenheit, and Kelvin for recipes, travel, studies, or technical reports. Adjust the source unit and view all scales simultaneously.

Usage Scenarios

• Adjust international cooking recipes.
• Plan trips and understand the weather forecast.
• Perform calculations in physics and chemistry.
• Configure industrial and laboratory equipment.

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Valor a converter*

Informe a temperatura no formato desejado. Use ponto ou vírgula para casas decimais.

Unidade de origem

Referências rápidas

0 °C = 32 °F = 273,15 K (ponto de congelamento da água ao nível do mar).
100 °C = 212 °F = 373,15 K (ponto de ebulição da água).
-40 °C é igual a -40 °F, uma curiosidade útil para calibração de sensores.

Temperature Scales: History and Use

Celsius (°C)

Created by Anders Celsius in 1742, it is the most used scale in the world. It is based on the freezing (0 °C) and boiling (100 °C) points of water.

Fahrenheit (°F)

Proposed by Daniel Gabriel Fahrenheit in 1724, it is used in the USA. Its original reference points were the temperature of a mixture of ice and salt (0 °F) and the temperature of the human body.

Kelvin (K)

Developed by Lord Kelvin in 1848, it is the absolute scale. Its zero point (0 K) is absolute zero, the coldest possible temperature. It is the standard for science.

Conversion Formulas

Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
Fahrenheit to Celsius: (°F - 32) × 5/9 = °C
Celsius to Kelvin: °C + 273.15 = K
Kelvin to Celsius: K - 273.15 = °C

Frequently Asked Questions

Get your questions answered about temperature scales.

How to convert from Celsius to Fahrenheit?+

Multiply the value in Celsius by 1.8 (or 9/5) and add 32. For example, 25 °C × 1.8 + 32 = 77 °F. The calculator does this automatically for you.

What is the temperature of absolute zero?+

Absolute zero is the lowest possible theoretical temperature, where particles stop moving. It corresponds to 0 K, -273.15 °C, or -459.67 °F. The Kelvin scale is based on this point.

When to use Kelvin instead of Celsius?+

The Kelvin scale is the standard in the International System (SI) and is mainly used in scientific contexts (physics, chemistry, astronomy). As it is an absolute scale, it simplifies thermodynamic formulas and avoids negative numbers.

Does the converter work with negative temperatures?+

Yes. You can enter negative values in Celsius or Fahrenheit, and the calculator will perform the corresponding conversion to the other scales, including the value in Kelvin (which is always positive).