Temperature Converters
Temperature measurements use fundamentally different scales depending on the application and region. Fahrenheit dominates daily life in the United States, while Celsius is used everywhere else and in scientific contexts worldwide. Kelvin serves as the absolute temperature scale for physics and chemistry, with zero representing the complete absence of thermal energy. Rankine, though less common, uses Fahrenheit-sized degrees but starts at absolute zero.
These converters handle all temperature scale conversions with precision. Unlike length or weight conversions that use simple multiplication, temperature conversions involve both multiplication and addition due to the different zero points of each scale. Our tools apply the correct formulas automatically.
Home cooks converting recipe temperatures, travelers interpreting weather forecasts, HVAC technicians working across systems, and scientists calculating thermodynamic values all require accurate temperature conversions in their work.
All Temperature Converters
Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius and Celsius to Fahrenheit. The most common temperature conversion for cooking, weather, and everyday applications. Formula: C = (F - 32) x 5/9.
Kelvin Converter
Convert between Kelvin, Celsius, and Fahrenheit. Kelvin is the SI base unit for thermodynamic temperature used in physics and chemistry. 0 K = -273.15 C = -459.67 F (absolute zero).
Rankine Converter
Convert between Rankine, Fahrenheit, Celsius, and Kelvin. Rankine uses Fahrenheit-sized degrees but starts at absolute zero. Used in some US engineering applications. 0 R = 0 K = -459.67 F.
Celsius to Fahrenheit Converter
Quick Celsius to Fahrenheit conversion for weather, cooking, and travel. Includes common reference points like body temperature (37 C = 98.6 F) and water boiling point (100 C = 212 F).
PSI to Bar Converter
Convert between PSI (pounds per square inch) and bar for pressure measurements. Used for tire pressure, compressed gases, and industrial applications. 1 bar = 14.5038 PSI.
ATM to PSI Converter
Convert between atmospheres (atm), PSI, bar, and pascals. Standard atmosphere is used as a reference for altitude, diving, and scientific pressure measurements. 1 atm = 14.696 PSI = 101.325 kPa.
MPH to KPH Converter
Convert miles per hour to kilometers per hour and vice versa. Essential for understanding speed limits and vehicle speeds when traveling internationally. 1 mph = 1.60934 kph.
Knots Converter
Convert knots to mph, kph, and meters per second. Knots measure speed in maritime and aviation navigation. 1 knot = 1.15078 mph = 1.852 kph.
Joules to Calories Converter
Convert between joules, calories, and kilocalories (food calories). Essential for nutrition labels, physics calculations, and energy comparisons. 1 calorie = 4.184 joules.
BTU to Watts Converter
Convert between BTU/hour and watts for heating and cooling equipment. Used for HVAC sizing, heater ratings, and air conditioner capacities. 1 BTU/hr = 0.293071 watts.
Which Converter Should You Use?
Cooking or baking? The Fahrenheit to Celsius Converter handles oven temperature conversions for international recipes. Common conversions: 350 F = 177 C, 400 F = 204 C, 450 F = 232 C.
Weather or travel? Use the same Fahrenheit to Celsius Converter to interpret forecasts. Remember: 0 C = 32 F (freezing), 20 C = 68 F (room temp), 30 C = 86 F (warm).
Scientific work? The Kelvin Converter handles absolute temperature conversions for thermodynamics, chemistry, and physics applications.
HVAC or engineering? Use the BTU to Watts Converter for heating/cooling equipment and the pressure converters for refrigerant and system pressures.