MAXScanner thermal & fluid engineering
Heat Transfer Coefficient Calculator — Convection h, Heat Rate & ΔT
Solve Q=hAΔT for convective heat-transfer coefficient, heat rate, area or temperature difference.
Last updated: September 17, 2026
Results
Leave exactly one of h, area, ΔT or Q blank
Formula, example and assumptions
Q=hAΔT.
h=50 W/m²K over 2 m² with ΔT=20 K transfers 2000 W.
- h is treated as a uniform effective coefficient over the entered area.
- Radiation and conduction resistances are excluded unless already embedded in an effective h.
Frequently asked questions
What are the units of h?
The SI unit is W/(m²·K).
Is h a material property?
Not by itself; it depends on fluid, flow, geometry and thermal conditions.