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Based on ASHRAE, SMACNA, NFPA, NEC, IPC and IEC engineering standards
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Free MEP Engineering Calculators — All Disciplines, One Place
MEPBase Tools provides 78+ free, professional-grade calculators for MEP (Mechanical, Electrical & Plumbing) engineers, designers, estimators and site teams. Every tool shows its formula, references and — where useful — worked examples and reference charts, so you can verify the math instead of trusting a black box.
HVAC Design
Size ducts with the online ductulator, convert TR to CFM, estimate cooling loads, size boiler feed pumps and refrigerant lines — per ASHRAE and SMACNA practice. All HVAC tools →
Fire Protection
Hydraulic calculations, sprinkler K-factors, fire pump selection, FM200/CO₂ clean agent sizing and tank capacity per NFPA codes. All fire fighting tools →
Plumbing & Public Health
Water supply pipe sizing by fixture units (WSFU), pump head and NPSH, hot water demand, and drainage design per IPC. All plumbing tools →
Electrical Power
Cable sizing, voltage drop, breaker selection, transformer and generator sizing, power factor and earthing per NEC and IEC methods. All electrical tools →
BMS & ELV — New
Building automation and low-voltage design tools, starting with CCTV storage calculation (NVR hard disk sizing in TB) — with fire alarm battery, UPS sizing and BMS points list calculators coming soon. Explore BMS & ELV →
Use these tools for preliminary design, quick checks and verification. Final designs should always be confirmed against project specifications, manufacturer data and applicable local codes.