Natural Convection HTC Calculator: Plate or Cylinder in Air

Free convection from a heated plate or cylinder in still air. Select body type and orientation, then enter the characteristic dimension and temperatures.

Body Type

Orientation

Characteristic Dimension mHeight (vertical) or diameter (horizontal cylinder)

Wall Temperature °C

Ambient Temperature °C

Results

Reference: ASHRAE Handbook of Fundamentals

Disclaimer: Results are for educational and reference purposes only. CANETCO makes no warranty as to the accuracy of these calculations for any specific application. Always verify results with a qualified licensed engineer before use in design, construction, or any professional application. CANETCO accepts no liability for decisions made based on outputs from this calculator.

Want to go deeper into heat transfer theory and applications?

CANETCO's Piping and Heat Exchangers course covers heat exchanger design, selection, and operation - including the convection fundamentals behind these calculations.

Piping & Heat Exchangers All Courses