Our Mission
Why we built MEP Calculators and what drives us
Every day, MEP engineers spend hours on repetitive calculations - duct sizing, cable sizing, pipe flow, heat loads. Expensive software tools are often out of reach for small firms, freelancers, and engineers in emerging markets. We believed there had to be a better way.
MEP Calculators was created to give every engineer access to professional-grade MEP calculators - completely free with a free account, with instant access for engineers. Our tools follow U.S. codes and standards including the National Electrical Code (NEC / NFPA 70), ASHRAE, NFPA, SMACNA, and the International Plumbing Code (IPC), alongside international standards.
🆓
Free for Everyone
All 114+ calculators are free to use with a free account. No credit card required. Instant access for engineers. We're supported by non-intrusive ads and optional Pro subscriptions.
🎯
Built for Accuracy
Every calculator is developed against published standards. We cite the code reference in each tool so you can verify the method yourself.
📏
US-Code Based
MEP Calculators is built around U.S. codes and standards - NEC, ASHRAE, NFPA, SMACNA, and IPC - with imperial-first inputs and results, while also supporting metric units and international standards.
🔓
No Lock-In
Export your results as PDF at any time. Your data belongs to you. We don't hold your calculations hostage behind a paywall.
What MEP Calculators Offers
Professional tools designed for real engineering workflows
🧮
47+ Calculators
HVAC, Electrical, Plumbing, Fire, Gas & Mechanical - all in one platform.
📄
PDF Export
Download professional calculation sheets for your project documentation.
💾
Save Calculations
Create an account to save and revisit your calculations anytime.
📁
Projects
Organise calculations by project for easy access and collaboration.
📐
Design Guides
Quick reference guides for IS codes, ASHRAE standards, and best practices.
🔄
SI & Imperial
Toggle between metric and imperial units seamlessly across all calculators.
MEP Disciplines Covered
Comprehensive coverage across all major MEP engineering domains
❄️
HVAC
Duct sizing, cooling loads, airflow, ventilation, refrigeration
⚡
Electrical
Cable sizing, voltage drop, load schedules, transformer sizing
🚿
Plumbing
Pipe sizing, flow rates, drainage, water demand, pump selection
🔥
Fire & Safety
Sprinkler design, hydrant flow, fire pump sizing, hose stream
⛽
Gas
LPG/PNG pipe sizing, pressure drop, demand estimation
🌬️
Air & Ventilation
Natural ventilation, IAQ, fresh air, exhaust calculations
Our Team
MEP Calculators is built and maintained by a small team of MEP engineers and developers
👨💻
Founder & Lead Engineer
MEP Engineering & Development
Licensed MEP engineer with 10+ years of experience in HVAC and electrical design. Built MEP Calculators to solve the tools gap for working engineers everywhere.
👩🔧
Calculation Specialist
HVAC & Plumbing
Expert in IS code compliance and ASHRAE methodologies. Responsible for validating all HVAC and plumbing calculator algorithms.
👨🔬
Electrical & Fire Lead
Electrical & Fire Safety
Specialist in IEC 60364 and NBC fire safety standards. Developed MEP Calculators's electrical sizing and fire suppression calculators.
Team details are representative. MEP Calculators is a collaborative platform - we welcome contributions from the engineering community.
Start Using MEP Calculators Today
Join thousands of MEP engineers using our free calculators. No credit card required.
