Temperature Converter — 8 Scales incl. Kelvin, Rankine & Delisle
Convert between 8 temperature scales — Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur, and Rømer. Includes an all-scales comparison table, a built-in reference points section (absolute zero, body temperature, boiling point), and context-aware facts for your temperature value.
0 °C in all scales
Reference Points
8 Scales
Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur & Rømer.
Instant
Results update in real time as you type.
Fun Facts
Context-aware notes about your temperature value.
Included Temperature Converter Tools
Temperature Scale Converter
Convert between any two of 8 scales — Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur, Rømer — with a swap button and instant result.
All-Scales Comparison Table
See your value expressed across all 8 temperature scales simultaneously for a full cross-scale comparison.
Reference Points Table
A built-in quick reference showing Absolute Zero, Water Freezing, Body Temperature, and Water Boiling in °C, °F, and Kelvin.
Context-Aware Fun Facts
Each conversion shows an auto-generated fact based on the temperature — from absolute zero to hotter than the surface of the Sun.
How to Convert Temperature
Enter a temperature
Type your temperature value into the input field.
Choose scales
Select your source scale (From) and target scale (To) from the dropdowns.
Read the result
The converted temperature appears instantly with a context-aware fun fact below.
Check all scales
The All Conversions table shows your value in all 8 scales, and the Reference Points table provides common benchmarks.
Frequently Asked Questions
- How do I convert Celsius to Fahrenheit?
- The formula is °F = (°C × 9/5) + 32. For example, 100°C = 212°F. Select Celsius in From, enter your value, and choose Fahrenheit in To for an instant result.
- What is Kelvin and why is it used?
- Kelvin is the SI base unit of temperature. Unlike Celsius or Fahrenheit, it has no negative values — it starts at absolute zero (0 K = −273.15°C). It is used in physics, astronomy, and scientific calculations.
- What are Delisle, Newton, Réaumur, and Rømer?
- These are historical temperature scales rarely used today. Delisle, Newton, Réaumur, and Rømer were each defined independently in the 18th century before Celsius and Fahrenheit became standard. ToolMint supports all 8 for completeness.
- What is absolute zero?
- Absolute zero is the lowest theoretically possible temperature: 0 K = −273.15°C = −459.67°F. At this point all classical molecular motion stops.
- What is normal human body temperature in Fahrenheit and Kelvin?
- Normal body temperature is approximately 37°C = 98.6°F = 310.15 K. This is one of the reference points shown in the built-in Reference Points table.