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Hndy Tools

Temperature Converter with Log History

Convert between Celsius, Fahrenheit, Kelvin, and Rankine with browser-based conversion history

Temperature
Celsius
Fahrenheit
Kelvin
Rankine
Science
Enter any temperature value. Absolute zero limits apply.

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Successfully converted temperatures will appear here.

Quick Reference

Common Temperature Conversions

Absolute Zero-273.15°C / -459.67°F / 0K
Water Freezes0°C / 32°F / 273.15K
Room Temperature20°C / 68°F / 293.15K
Body Temperature37°C / 98.6°F / 310.15K
Water Boils100°C / 212°F / 373.15K

Conversion Formulas

°F = (°C × 9/5) + 32
°C = (°F - 32) × 5/9
K = °C + 273.15
°R = (°C + 273.15) × 9/5

Sample Temperatures

About Temperature Converter

Temperature Scales

Temperature can be measured in different scales. This tool supports four major scales: Celsius (°C) - used worldwide, Fahrenheit (°F) - commonly used in the US, Kelvin (K) - the SI unit used in science, and Rankine (°R) - used in some engineering fields.

Common Use Cases

  • Cooking & Baking: Convert recipe temperatures between °C and °F
  • Weather: Understand weather forecasts in different regions
  • Science & Engineering: Work with absolute temperature scales (K, °R)
  • Travel: Adapt to temperature units used in different countries
  • Education: Learn about different temperature scales

History Feature

Successfully converted temperatures are automatically saved to your browser's local storage. You can revisit previous conversions, compare different temperatures, and manage your conversion history.

Privacy & Security

All temperature conversions happen in your browser. No data is sent to our servers. History is stored locally in your browser and can be cleared at any time.

Frequently Asked Questions (FAQ)

What temperature scales can I convert between?
This tool supports conversion between four major temperature scales: Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R). You can convert from any scale to all others simultaneously.
How do I convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, use the formula: °F = (°C × 9/5) + 32. For example, 0°C = 32°F, and 100°C = 212°F. Simply enter your Celsius value and select Celsius as the input scale.
What is absolute zero?
Absolute zero is the lowest possible temperature where all molecular motion stops. It equals -273.15°C, -459.67°F, 0 K, or 0°R. This tool prevents entering temperatures below absolute zero.
What is the difference between Kelvin and Celsius?
Kelvin and Celsius use the same scale size, but Kelvin starts at absolute zero (0 K = -273.15°C). Kelvin is the SI unit for temperature and commonly used in science. The conversion is: K = °C + 273.15.
When would I use Rankine scale?
Rankine is primarily used in engineering fields in the United States. Like Kelvin, it starts at absolute zero, but uses Fahrenheit-sized degrees. The conversion is: °R = °F + 459.67.
Is my conversion history secure?
Yes, all conversions happen locally in your browser. Your conversion history is stored only in your browser's local storage and is never sent to any servers.
How accurate are the conversions?
All conversions use standard scientific formulas with floating-point precision. Results are displayed with 2 decimal places by default, which is suitable for most practical applications.
Can I convert negative temperatures?
Yes, you can convert negative temperatures as long as they are above absolute zero. The tool validates that input temperatures are physically possible and prevents values below absolute zero.