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    Voltra

    Professional ElectricalEngineering Calculators

    Available Calculators

    Load Calculation

    Calculate diversified and maximum demand for buildings, with BS 7671 and IET guidance compliance built in.

    • Diversified demand calculations
    • BS 7671 compliance checking
    • Automatic load scheduling
    • Mixed-use development support
    Open Calculator

    PV Sizing

    Design solar PV systems with regional yield analysis, financial projections, and G98/G99 compliance.

    • Regional yield estimation
    • Financial payback analysis
    • G98/G99 compliance checking
    • Self-consumption modeling
    Open Calculator

    Battery Sizing

    Size battery storage systems with backup duration calculations, grid-tie configurations, and lifecycle costing.

    • Backup duration calculations
    • Grid-tie & off-grid configs
    • Lifecycle cost analysis
    • Regulatory compliance checking
    Open Calculator

    Containment Sizing

    Size cable trays and containment with thermal derating, fill factor optimisation, and support system design.

    • Thermal derating analysis
    • Fill factor optimization
    • Support system design
    • Multi-tier tray calculations
    Open Calculator

    Cable Calculations

    Size cables with voltage drop analysis, current carrying capacity, and protection coordination.

    • Voltage drop analysis
    • Current carrying capacity
    • Protection coordination
    • Fault level calculations
    Open Calculator

    More Coming Soon

    New tools are on the way

    Combined Project Report

    Pull together results from every calculator you've run — Load, PV, Battery, Cable and Containment — into a single client-ready PDF with the regional compliance basis included.

    Open report

    Why Choose Voltra?

    Professional-grade tools designed to streamline your electrical design workflow

    Quick Start Guide

    Get started with Voltra in just 5 simple steps

    Get in Touch

    Have a question, found a bug, or want to request a feature? We'd love to hear from you.