Built for everyday engineering work
Fast, transparent HVAC and MEP calculators for practical design checks, equipment selection and technical verification.
Every BuildMEP calculator shows its calculation basis, units, assumptions and design limitations so results can be independently checked.
Pump Head Calculator
Estimate total dynamic head, pipe and fitting losses, equipment pressure drop and approximate pump power for closed-loop hydronic systems.
- Hydronic
- TDH
- Pump Power
Pipe Size Calculator
Select a practical chilled-water pipe size and check velocity and friction rate across steel, copper and PPR pipe options.
- Chilled Water
- Velocity
- Friction Loss
Duct Size Calculator
Estimate round or rectangular duct dimensions, air velocity and approximate straight-duct friction loss from airflow and design velocity.
- Round / Rectangular
- Velocity
- Friction Loss
Heat Load Calculator
Estimate sensible and latent room cooling load, required capacity in kW or TR, and a preliminary equipment selection.
- Cooling Load
- kW / TR
- Sensible + Latent
HVAC Unit Converter
Convert common HVAC and MEP units including TR, kW, airflow, pressure, temperature, velocity and power.
- TR
- kW
- CFM
- Pa
How BuildMEP tools work
Designed for transparent preliminary checks
Transparent calculations
Key assumptions and the engineering basis are shown beside the result.
Practical units
Use common HVAC and MEP units including kW, TR, CFM, Pa and L/s.
Design-check support
Use results for preliminary checks and selection—not final code-compliance approval.
