Physics

Convection Heat Transfer Calculator

Estimate heat transfer using a specified convective heat-transfer coefficient.

SI units shown beside each fieldIdeal model explained below
Physics lab
Physics lab

Use the units beside each input and review the model assumptions.

See the method

Define your system

Runs on your device

Your calculated quantity

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter heat transfer coefficient, area, surface temperature, bulk fluid temperature.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Heat rate = hA(Tsurface−Tfluid).

A WORKED EXAMPLE

Using heat transfer coefficient = 10 W/(m²·K), area = 2 m², surface temperature = 80 °C, bulk fluid temperature = 20 °C, the result is 1200 W. Change these example inputs to match your task; use the method above to check each step.

Understanding your result

The coefficient must suit the geometry and flow. The tool does not infer h from air speed or fluid properties.

What to keep in mind

The coefficient must suit the geometry and flow. The tool does not infer h from air speed or fluid properties. An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Common questions

How do I use this convection heat transfer calculator?

Estimate heat transfer using a specified convective heat-transfer coefficient. Enter heat transfer coefficient in W/(m²·K), area in m², surface temperature in °C, bulk fluid temperature in °C. The starting example is editable; use values for the same system or project.

Which assumptions affect this result?

The coefficient must suit the geometry and flow. The tool does not infer h from air speed or fluid properties.

Methodology maintained by ClarityKit. How these tools are built and checked.