Temperature Converter

Instantly convert temperatures between Celsius, Fahrenheit, and Kelvin, fast, free, and 100% client-side. Works entirely in your browser with no account or software installation needed..

°C
°F
K

What is Temperature Converter | Rune

A free Temperature Converter that instantly converts values between Celsius (°C), Fahrenheit (°F), and Kelvin (K). Essential for cooking, weather forecasting, and scientific research, all calculations happen in your browser with no data sent to servers.

Provides precise calculations with detailed breakdowns and explanations for educational and professional use. Supports multiple units, formats, and input methods to accommodate different calculation requirements. Results include clear formatting and export options for use in reports, spreadsheets, and presentations. This tool runs entirely in your browser, requiring no software downloads or installations on your device.

500K+
Monthly Users
3
Temperature Scales
Instant
Conversion
100%
Private

Key Features of Temperature Converter

Everything you need for professional temperature converter

Real-Time Conversion

See instant results as you type. All three temperature scales update simultaneously for seamless conversion.

Three Temperature Scales

Convert between Celsius, Fahrenheit, and Kelvin effortlessly. Perfect for cooking, science, and travel.

Precise Calculations

Accurate temperature conversions with proper decimal handling. No rounding errors or floating point issues.

Bidirectional Input

Enter a value in any field and all others update automatically. No need to select source or target scales.

Mobile Optimized

Fully responsive design that works perfectly on any device. Convert temperatures on-the-go from your phone.

100% Private

All calculations happen in your browser. No data is sent to servers or stored anywhere. Complete privacy.

How to Use Temperature Converter

Follow these simple steps to get started

01

Enter Temperature

Type your temperature value into any field - Celsius, Fahrenheit, or Kelvin.

02

View Conversions

See all other temperature scales update automatically in real-time.

03

Reset if Needed

Click the reset button to clear all fields and start fresh.

RunePro Tips

  • Water freezes at 0°C (32°F, 273.15K) and boils at 100°C (212°F, 373.15K) at sea level.
  • For cooking, common oven temperatures are 180°C (350°F) for moderate and 200°C (400°F) for hot.
  • Room temperature is typically around 20-22°C (68-72°F) or about 293-295K.
  • Absolute zero (0K or -273.15°C) is the lowest possible temperature where all molecular motion stops.
  • A quick Fahrenheit to Celsius estimate: subtract 30, then divide by 2.

Frequently Asked Questions

Everything you need to know about Temperature Converter

What is a Temperature Converter?

A Temperature Converter is a free online tool that allows you to instantly convert temperature values between different scales including Celsius (°C), Fahrenheit (°F), and Kelvin (K). It's essential for cooking, weather forecasting, scientific research, international travel, and understanding temperature measurements.

What is Celsius (°C)?

Celsius (also called Centigrade) is a temperature scale where 0°C represents the freezing point of water and 100°C represents the boiling point of water at standard atmospheric pressure. It is the most widely used temperature scale globally and is the standard in most countries.

What is Fahrenheit (°F)?

Fahrenheit is a temperature scale where water freezes at 32°F and boils at 212°F under standard atmospheric conditions. It is primarily used in the United States, its territories, and a few Caribbean nations.

What is Kelvin (K)?

Kelvin is the base unit of temperature in the International System of Units (SI). It is an absolute temperature scale, meaning 0 K represents absolute zero, the theoretical temperature at which all molecular motion ceases. Kelvin is extensively used in scientific research.

How do I convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit manually, use the formula: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. Our converter does this instantly, just type your Celsius value.

Is my data safe and private?

Absolutely! All temperature conversions happen entirely in your web browser using JavaScript. No data is ever sent to our servers, stored, or shared with third parties. This tool is 100% client-side, ensuring complete privacy.

Still need help?

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