🌡️ Free Temperature Converter

What is this tool?

The Temperature Converter is a free online tool that instantly converts values between the three most common temperature scales: Celsius (°C), Fahrenheit (°F), and Kelvin (K). Whether you are checking a weather forecast abroad, following an international recipe, working on a science assignment, or comparing oven temperatures, this tool gives you the exact equivalent in seconds. It uses the internationally standardized conversion formulas, and everything runs locally in your browser — your values are never sent to any server.

How it works

The converter applies the standard temperature formulas between scales. To convert Celsius to Fahrenheit it uses F = C × 9/5 + 32, and Celsius to Kelvin uses K = C + 273.15. Fahrenheit to Celsius uses C = (F − 32) × 5/9, and Kelvin to Celsius uses C = K − 273.15. Combining these two core conversions, the tool can convert between any pair of the three scales. Results are rounded to a configurable precision, and negative values (including temperatures below zero) are handled correctly.

How to use

1. Enter the temperature value you want to convert in the input box (decimals are supported).
2. Choose the unit you are converting from in the first dropdown (Celsius, Fahrenheit, or Kelvin).
3. Choose the target unit in the second dropdown, then click Convert.
4. Read the converted value instantly, along with a short summary of the calculation used.

Frequently Asked Questions

Why are there three different temperature scales?

Celsius is the metric standard used in most of the world, Fahrenheit is common in the United States, and Kelvin is the scientific absolute scale used in physics and engineering. Converting between them is a routine need for travel, cooking, and study.

Is this temperature converter accurate?

Yes. The tool uses the exact official conversion formulas (C = (F − 32) × 5/9, F = C × 9/5 + 32, K = C + 273.15). These are the same formulas used by meteorologists, engineers, and scientists worldwide.

Can I convert negative temperatures?

Absolutely. Negative values such as −10 °C or −4 °F are fully supported and converted correctly.

Tips & Advice

When baking, remember that 180 °C equals 350 °F (a common oven setting). For quick mental math, °F ≈ °C × 2 + 30 gives a good approximation for everyday temperatures. If you are working with scientific data, always use Kelvin to avoid negative values.