Engineering Calculators

Professional calculation tools for electrical, HVAC, mechanical, plumbing, and structural engineering. All calculators are based on international standards and verified against reference values.

Calculators

Popular Calculators

Popular

Our most-used engineering tools with advanced features

Flagship

Fan/System Curve Calculator

Interactive tool to analyze fan performance curves, system resistance curves, and determine the operating point. Essential for HVAC fan selection and VFD optimization.

Trending

Solar Panel Payback Calculator

Calculate your solar panel investment ROI with NPV, IRR, and payback period analysis. Uses NREL PVWatts methodology for accurate production estimates. Includes Federal ITC (30%), state incentives, financing options, and 25-year cash flow projections.

Professional

Psychrometric Calculator

Calculate air properties, psychrometric processes, and air mixing using ASHRAE standards

Trending

EV vs Gas TCO Calculator

Compare the Total Cost of Ownership between Electric Vehicles and Gas vehicles. Includes purchase costs, fuel/energy, maintenance, depreciation, incentives, and environmental impact analysis with break-even projections.

Professional

Panel Schedule Builder

Create NEC 2023 compliant electrical panel schedules with automatic load calculations, breaker sizing, and wire selection. Perfect for residential and commercial electrical design.

High Demand

AC Running Cost Calculator

Calculate your air conditioning electricity costs based on unit capacity, SEER rating, usage patterns, and regional electricity rates. Includes monthly breakdown, efficiency comparison, and upgrade ROI analysis.