Free Engineering Tools

MEP & FM Engineering Calculators

Professional tools for HVAC engineers, MEP designers and facilities management teams — completely free, no signup required.

❄️

HVAC Calculator

AC Tonnage Calculator

Calculate the exact air conditioning capacity for any room — supports 80+ countries with climate-specific multipliers. Get results in tons, BTU/hr and kW.

80+ countries 3-step wizard Tons / BTU / kW

Use Calculator →

📋

Facilities Mgmt SFG 20

PPM Checklist Generator

Generate SFG 20-aligned planned preventive maintenance checklists for 60+ assets across HVAC, electrical, fire, water, BMS and security systems. Download as Word or PDF.

60+ assets SFG 20 aligned Word & PDF

Generate Checklist →

📄

Facilities Mgmt FM Standard

SOP Generator

Generate Standard Operating Procedures for any FM equipment or task. 10 procedure types, 12 equipment presets, real FM-standard steps. Download as Word or PDF.

10 procedure types 12 equipment Word & PDF

Generate SOP →

🌬️

HVAC Calculator

Duct Sizing Calculator

Size circular and rectangular ducts using Equal Friction Method or Velocity Method. Metric and imperial units. Includes ASHRAE velocity reference table and duct schedule.

2 methods Metric & Imperial ASHRAE based

Use Calculator →

⚡

Electrical IEC Standard

Electrical Load Calculator

Calculate building electrical load covering lighting, small power, HVAC, mechanical and general equipment. Get total kW, kVA, current per phase and MCB sizing per IEC standard.

5 load categories kW / kVA / Amps IEC 60364

Use Calculator →

📅

Facilities Mgmt SFG20

PPM Planner

Generate a complete annual PPM schedule for your building. Select assets from HVAC, electrical, plumbing and fire categories. Downloads as a professional Excel file.

48 assets 300+ tasks Excel download

Generate PPM Plan →

More tools coming soon

We are building more free MEP & FM engineering tools. Suggest what you need via the contact page.

💧

Pump Head Calculator

Coming soon

💡

Lux / Lighting Calculator

Coming soon

🔧

Transformer Sizing Calculator

Coming soon

Have a tool suggestion?

Tell us what MEP or FM calculation tool you need and we will build it — free.

Suggest a Tool →