Heat Exchanger Duty Calc

Sizing a heat exchanger or verifying duty on an existing unit? Enter hot and cold side temperatures, flow rate, fluid specific heat, and specific gravity. Get instant LMTD, heat duty in BTU/hr, UA product, and thermal effectiveness for both counter-flow and parallel-flow configurations. WHAT IT CALCULATES: - Log Mean Temperature Difference (LMTD) - Heat duty in BTU per hour - UA product (overall heat transfer coefficient times area) - Thermal effectiveness (actual vs maximum possible heat transfer) FLOW CONFIGURATIONS: - Counter-flow (hot and cold fluids flow in opposite directions) - Parallel-flow (hot and cold fluids flow in the same direction) INPUTS: - Hot side inlet and outlet temperatures - Cold side inlet and outlet temperatures - Flow rate (GPM) - Fluid specific heat (Cp) - Fluid specific gravity KEY FEATURES: - Counter-flow and parallel-flow support - Instant results as you adjust inputs - Clean, field-friendly interface - Works completely offline - No account or login required Built for process engineers, mechanical designers, and plant operators who need quick heat exchanger performance calculations during design, commissioning, or troubleshooting.