Temperature Converter
Type a Celsius value in the Celsius field (sample default is 25). The result shows Fahrenheit with F and Kelvin with K on separate lines using F = C × 9/5 + 32 and K = C + 273.15. Non-numeric input shows Enter Celsius.
Updated 2026-08-03 · units
F: 77
K: 298.15
About this tool
This page converts from Celsius only. There is no Fahrenheit or Kelvin input mode. Output updates live as you edit the Celsius field, so you can nudge the number and watch both scales move together.
How to use
- Open the converter: Load this page so the Celsius input and result area are visible.
- Enter Celsius: Type the temperature in Celsius (sample starts at 25).
- Read Fahrenheit and Kelvin: Watch the result update with F and K lines as you change the value.
- Fix invalid input: If you see Enter Celsius, replace the field with a finite number.
Common use cases
- Convert a weather forecast in Celsius into Fahrenheit for travel notes.
- Turn a lab Celsius reading into Kelvin for a science worksheet.
- Double-check oven or climate figures when a source mixes °C and °F.
Tips
- Keep the input in Celsius; the tool does not accept F or K as the source.
- Expect two lines such as F: 77 and K: 298.15 for 25 °C.
FAQ
Can I type Fahrenheit as the input?
No. The field is Celsius only; Fahrenheit and Kelvin are outputs.
What formulas are used?
Fahrenheit is C × 9/5 + 32. Kelvin is C + 273.15.
Why does it say Enter Celsius?
The value is not a finite number, so conversion is skipped.
Is my temperature uploaded?
Conversion runs in your browser as you type; no account is required.