Professional-grade electrical calculations for global engineers. All the tools you use daily — cable sizing, arc flash, SLD builder and more. No $30,000 license required.
From basic cable sizing to advanced arc flash analysis. Every calculation referenced to the exact standard clause.
IEC 60364 / NEC 310
3-phase fault analysis
IEC / NEC compliant
IEC 60076 / IEEE C57
IEEE 1584 / NFPA 70E
IEEE 80 compliant
Grid & off-grid systems
Drag & drop + Auto-gen
Radial network analysis
17 years of industrial plant design experience baked into every calculator.
From basic cable sizing to advanced arc flash and load flow analysis. Every calculation an electrical engineer needs, in one platform.
IEC 60364, NEC (NFPA 70), IS (Indian Standard), BS 7671, AS/NZS 3000. Switch standards with one click — all free.
Generate stamped calculation reports with your company logo, revision blocks, and methodology notes. Ready to submit to clients.
Drag-and-drop single line diagram builder with auto-linked calculations. No AutoCAD license needed.
Every formula is referenced to the exact standard clause. Built by a practicing electrical engineer with 17 years of industrial experience.
Group calculations by project, add revision history, share with your team. Your full calculation register, in the cloud.
ETAP is powerful but built for a different era. Voltcal is built for how engineers work today.
Finally a tool that replaces ETAP for 90% of my daily calculations. The PDF reports are professional enough to submit directly to clients.
Ahmed Al-Rashidi
Senior Electrical Engineer
EPC Contractor, Dubai
The IS standard support is perfect for Indian projects. Cable sizing and short circuit calculations save me hours every week.
Rajesh Kumar
Electrical Design Engineer
MEP Consultants, Mumbai
NEC-compliant calculations with clean outputs. Arc flash calculator is surprisingly accurate compared to ETAP results.
James Thornton
Electrical Engineer
Industrial Plant, Houston TX
Start free. Upgrade when you need to deliver to clients.
For engineers who want to explore