Built for everyday engineering work
Fast, transparent HVAC and MEP calculators for practical design checks, equipment selection and technical verification.
Pump Head Calculator
Free pump head calculator for HVAC hydronic systems. Total dynamic head from pipe friction, fitting equivalent lengths, equipment losses and static lift
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Free Pipe Size Calculator for chilled water and hydronic systems. Check velocity and friction rate across steel, copper and PPR sizes using Darcy-Weisbach
Open toolDuct Size Calculator
Use this free HVAC duct size calculator to estimate round and rectangular duct dimensions from airflow and design velocity. The tool helps engineers, contractors, and technicians quickly check…
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HVAC Heat Load Calculator
Calculate room cooling load online using BuildMEP's free HVAC Heat Load Calculator. Estimate sensible and latent heat loads, required cooling capacity in kW and TR, and select the…
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BuildMEP HVAC Unit Converter
Free HVAC unit converter for TR to kW, BTU/h to kW, CFM to L/s and m³/h, Pa to mmWC, temperature, velocity, power and more.
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