Smart Calculators for Energy, Power & Sustainability Engineers
Instantly compute battery bank capacity, carbon footprints, and power factor correction — built by engineers, for engineers. No signup, no cost, no guesswork.
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WHAT WE OFFER
Precision tools for real engineering decisions
EfficiencyEval provides free, browser-based calculators for energy systems, electrical engineering, and sustainability assessments. All formulas are based on established engineering standards. Results are instant, accurate, and ready to use in reports or procurement documents.
FEATURED CALCULATORS
Battery Capacity & Sizing
Compute VAH capacity, number of batteries, and AH requirements for solar, UPS, and off-grid power systems.
Carbon Footprint Calculator
Estimate COâ‚‚ equivalent emissions from your energy consumption, transportation, and daily activities. Essential for sustainability reporting and ESG assessments.
Power Factor Correction Calculator
Find the exact KVAR capacitor rating needed to improve your power factor to the target value. Reduces energy waste and avoids utility penalties.
WHO USES THIS
Built for working engineers and energy professionals
- Electrical and Mechanical Engineers
- Solar & renewable energy system designers
- Energy auditors and consultants
- Facility managers and building owners
- Students, researchers, and academics
- Procurement officers and project teams
More calculators coming soon
We are continuously adding new tools — load flow analysis, HVAC efficiency, lighting design calculators, and more. Check back regularly or bookmark this page.