Industrial Thermal Engineering
Calculators
10 free, no-login tools built for U.S. manufacturing and process plant engineers. Imperial units, ASME and NEC standards, results in seconds — not after a sales call.
Why We Built These Tools
Every thermal engineering calculator that exists online falls into one of two traps: it's either built for students (metric units, academic examples, no real-world context) or it's locked behind a vendor's sales funnel — you have to request a demo just to size a steam trap.
Plant engineers in U.S. manufacturing don't have time for either. When you're standing next to a heat exchanger that's underperforming, you need a number right now — in BTU/hr, inches, PSI, and °F.
Each calculator mirrors the workflow a process engineer follows in the field: enter the conditions you actually know, get the number you actually need. All tools are based on ASME B31.3, NEC Article 430, Crane TP-410, and TEMA standards where applicable.
All 10 Calculators — All Live
Calculate heat duty (BTU/hr), LMTD, and required surface area (ft²) for shell & tube and plate heat exchangers. Includes animated flow diagram and temperature profile chart.
Calculate pipe growth (ΔL inches), thermal stress (psi), and U-loop expansion leg length. Covers CS A106, SS 304/316, Copper, Inconel, CPVC and more. Based on ASME B31.3.
Calculate BTU/hr heat loss from bare and insulated steam lines side-by-side. Outputs condensate lb/hr, annual energy cost, OSHA 140°F surface temp check, and insulation payback period.
Calculate heat rejection in BTU/hr and tower tons, approach temperature, evaporation loss, and makeup water GPM. Process cooling and chiller condenser modes. COC and glycol correction included.
Calculate minimum insulation thickness for process piping up to 1,200°F. Iterative cylindrical conduction solver for OSHA 140°F personnel protection and energy conservation goals.
Calculate flash steam percentage and flow rate (lb/hr) when high-pressure condensate is discharged to lower pressure. Uses built-in ASME steam tables for accurate latent heat at both pressures.
Calculate WHP, BHP, next NEMA motor HP, kW input, wire-to-water efficiency, annual energy cost, and VFD savings. PSI or TDH input. SG correction for water, glycol, and oil.
Size a process chiller from machine heat load, coolant flow, and supply/return temperatures. Outputs tons of refrigeration, chiller kW, and COP. For CNC, injection molding, and hydraulic cooling.
Darcy-Weisbach + Colebrook-White friction factor. NPS Sch 40 & 80 pipe sizes, 8 materials, 8 fluids, 10 fittings K-values (Crane TP-410). Velocity check and Reynolds number flow regime badge.
Look up saturated steam properties by psig or °F — saturation temp, latent heat, enthalpy (h_f / h_fg / h_g), specific volume, and steam density. Full 50-row interactive reference table. ASME steam tables.
Built for Plant Engineers — Not Students
Every design decision in this tool library reflects how real engineers actually work on the plant floor.