Temperature Converter

Converters

Convert between Celsius, Fahrenheit, and Kelvin instantly.

Nothing Is UploadedRuns In This Browser TabNo Account Needed

How It Works

1

Upload / Input

Select your files or paste your content to get started.

2

Process

The work happens in this browser tab. Your file never leaves your device, so nothing is queued, stored or transmitted.

3

Download / Result

Get your results instantly. Download files or copy output in one click.

Features

Celsius, Fahrenheit, and Kelvin
Real-time bidirectional conversion
Common reference points table
All three scales shown side by side
Works entirely offline — nothing is sent anywhere

How to use Temperature Converter

  1. Choose your units

    Celsius, Fahrenheit or Kelvin.

  2. Enter the value

    The conversion updates as you type.

  3. Read the result

    All equivalent units are shown together.

  4. Check the sign

    Negative temperatures are where mistakes most often creep in.

When to use Temperature Converter

  • Following a recipe written in the other temperature scale
  • Understanding a weather forecast from another country
  • Converting an oven temperature for a fan or gas oven
  • Working with scientific values in Kelvin

FAQ

Celsius (C), Fahrenheit (F), and Kelvin (K) are all supported with instant bidirectional conversion.
Results are calculated to two decimal places using the exact mathematical formulas, so precision is as high as floating-point arithmetic allows.
Multiply by 9, divide by 5, then add 32 — or more simply multiply by 1.8 and add 32. So 20 °C becomes 68 °F.
Double the Celsius value and add 30. It is close around room temperature but drifts significantly at extremes — 100 °C gives 230 rather than the correct 212.
Yes, −40. That is the single point where the two scales cross, which makes it a handy reference.
The conversion is probably right but the oven type differs. Fan-assisted ovens typically need about 20 °C less than conventional ones for the same result.

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About Temperature Converter

Celsius and Fahrenheit differ in two ways at once: where zero sits and how big a degree is. That is why conversion needs both a multiplication and an addition — C to F is multiply by 1.8 then add 32 — and why the quick mental shortcut of doubling and adding 30 drifts increasingly wrong the further you get from room temperature.

Kelvin shares the size of a Celsius degree but starts at absolute zero, so converting between them is a simple addition of 273.15. There are no negative Kelvin values, because absolute zero is the bottom of the scale.

A few anchors are worth memorising: −40 is the same in both Celsius and Fahrenheit, 0 °C is 32 °F, 37 °C is body temperature at 98.6 °F, and 100 °C is 212 °F. Those cover most everyday sanity checks.

Tips and limits

  • −40 °C and −40 °F are the same temperature — a useful anchor.
  • C to F: multiply by 1.8, add 32. F to C: subtract 32, divide by 1.8.
  • The "double it and add 30" shortcut drifts badly away from mild temperatures.
  • Kelvin = Celsius + 273.15, and never goes negative.
  • Fan ovens typically run about 20 °C lower than conventional at the same setting.