🌡️ Temperature Unit Converter

Convert between Celsius, Fahrenheit, Kelvin, and Rankine with precision. Professional tool for scientists, engineers, and temperature calculations.

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Common Units
Formulas
Examples
Guide

Temperature Converter

Common Temperature Units

Celsius
°C

Water freezes at 0°C, boils at 100°C

Fahrenheit
°F

Water freezes at 32°F, boils at 212°F

Kelvin
K

Absolute zero at 0K, water freezes at 273.15K

Rankine
°R

Absolute zero at 0°R, water freezes at 491.67°R

💧 Water Properties
• Freezing Point: 0°C = 32°F = 273.15K = 491.67°R
• Boiling Point: 100°C = 212°F = 373.15K = 671.67°R
🌡️ Body Temperature
Normal human body temperature:
37°C = 98.6°F = 310.15K = 558.27°R
❄️ Absolute Zero
Coldest possible temperature:
-273.15°C = -459.67°F = 0K = 0°R

Temperature Conversion Formulas

Celsius to Fahrenheit
°F = (°C × 9/5) + 32

Multiply Celsius by 9/5 and add 32

Fahrenheit to Celsius
°C = (°F - 32) × 5/9

Subtract 32 from Fahrenheit and multiply by 5/9

Celsius to Kelvin
K = °C + 273.15

Add 273.15 to Celsius

Kelvin to Celsius
°C = K - 273.15

Subtract 273.15 from Kelvin

Celsius to Rankine
°R = (°C + 273.15) × 9/5

Add 273.15 to Celsius, then multiply by 9/5

Rankine to Celsius
°C = (°R × 5/9) - 273.15

Multiply Rankine by 5/9, then subtract 273.15

Quick Conversion Examples

0°C → 32°F

Freezing Point

100°C → 212°F

Boiling Point

37°C → 98.6°F

Body Temperature

25°C → 77°F

Room Temperature

-40°C → -40°F

Equal Point

0°C → 273.15K

Absolute Scale

How to Use This Temperature Converter

Step 1: Enter Value

Type the temperature value you want to convert in the "From Temperature" field.

Step 2: Select Units

Choose the source temperature unit from the dropdown (Celsius, Fahrenheit, Kelvin, or Rankine).

Step 3: Choose Target Unit

Select the unit you want to convert to from the "To Unit" dropdown.

Step 4: View Result

The converted value will appear automatically in the "To Temperature" field.

Step 5: Use Tools

Use the swap button (⇄) to quickly reverse the conversion, or copy/round the result as needed.

🎯 Tips for Accurate Conversion
• Use decimal values for precise measurements
• Remember that Kelvin and Rankine are absolute temperature scales
• Celsius and Fahrenheit can have negative values, but Kelvin and Rankine cannot go below zero
🔬 Scientific Applications
• Use Kelvin for thermodynamics and physics calculations
• Celsius is commonly used in scientific measurements
• Fahrenheit is primarily used in the United States
• Rankine is used in engineering applications with Fahrenheit