Skip to main content

Free Temperature Converter – Celsius, Fahrenheit & Kelvin

Temperature Converter changes Celsius, Fahrenheit, and Kelvin instantly online for free. Accurate temperature conversion in your browser.

3 ScalesReal-timeCelsius · Fahrenheit · KelvinCopy ResultsFree

Converted Values

Celsius (°C)
100
Fahrenheit (°F)
212
Kelvin (K)
373.15

100% Private

All conversions run locally in your browser. Nothing is uploaded.

How to Use Temperature Converter

1

Enter a Temperature

Type a value into the scale you know, such as Celsius or Fahrenheit.

2

Read Other Scales

The remaining scales update instantly so you can compare them together.

3

Copy the Result

Copy the converted temperature for your recipe, homework, or forecast.

Convert Celsius, Fahrenheit, and Kelvin in Real Time

The Helperzy Temperature Converter translates any temperature between Celsius, Fahrenheit, and Kelvin the instant you type. Enter a value in one scale and the other two update automatically, so you do not have to remember the formulas — multiply Celsius by 9/5 and add 32 for Fahrenheit, or add 273.15 for Kelvin. Temperature scales trip people up because they do not share a zero point. Celsius and Fahrenheit cross over at minus 40 degrees, and Kelvin starts at absolute zero rather than the freezing point of water. This converter handles those offsets correctly, so a value like normal body temperature reads as 37 degrees Celsius, 98.6 degrees Fahrenheit, and 310.15 Kelvin all at once. Common uses include converting an oven temperature from a foreign recipe, checking a fever reading when your thermometer uses a different scale than you expect, translating a weather forecast for travel, or solving physics homework that requires Kelvin. Because all three scales appear together, you can sanity-check a number against the scale you know best. The tool runs entirely in your browser with exact formulas, so it is instant, works without an internet connection after loading, and never uploads or stores any value you enter. Your data stays private on your device.

Frequently Asked Questions – Temperature Converter

Enter your value in the Celsius field and the Fahrenheit result appears instantly. The formula is Fahrenheit = Celsius × 9/5 + 32, which the Helperzy Temperature Converter applies automatically so you get the exact answer.