🌡️ Temperature Conversion
Switch between all major temperature scales.
Perfect for science labs, HVAC calculations, and culinary conversions.
25 Celsius (°C) equals
77 Fahrenheit (°F)
Other Units
Celsius (°C)
25
Kelvin (K)
298.15
Rankine (°R)
536.67
How to Use This Calculator
Enter the temperature
Type the value you need to convert from lab notes or forecasts.
Select the scales
Choose the starting and target temperature units (°C, °F, K, °R).
Use the reference grid
Grab the other units for comprehensive reporting or calculations.
Formula
°F = (°C × 9/5) + 32
K = °C + 273.15
°R = (°C + 273.15) × 9/5
°C = (°F − 32) × 5/9
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Whether you’re balancing chemical reactions, configuring HVAC equipment, or translating recipes, temperature conversions must be precise. This tool covers the common SI and imperial scales.
Kelvin and Rankine provide absolute scales for thermodynamics, which makes them essential in scientific contexts. The calculator keeps those relationships exact so your calculations remain reliable.
For quick reference, you can copy all unit equivalents at once—handy for tables, documentation, or cross-checking sensors.
Frequently Asked Questions
Can I convert negative temperatures?
Yes. The formulas handle negative values correctly, including below-zero Fahrenheit or Celsius.
What is Rankine used for?
Rankine is the Fahrenheit-based absolute temperature scale, useful in certain engineering and thermodynamics contexts.
Does it support Réaumur or Delisle?
Not yet. Add entries to the temperature unit list if you need historical scales.
Why does Kelvin start at absolute zero?
Kelvin measures absolute thermal energy; 0 K represents absolute zero, the theoretical point where molecular motion stops.