Enter Parameters & Calculate
Select cable type and size, fill in load and installation details, then click Calculate.
% VD = (√3 × IFL × (R·cosΦ + X·sinΦ) × L × 100) ÷ (VLL × Nruns × 1000)
13 professional calculators + full LT Panel Designer. Cable sizing, DG/UPS/solar, short circuit, lighting, power factor, transformer ROI — plus complete warehouse panel design with Excel export.
Full cable database with actual R/X impedances, rated currents per installation media, SC withstand capacity, and 4-factor derating (K2 temp · K3 soil · K4 grouping · K5 depth). Supports LT PVC/XLPE & HT XLPE cables.
Add appliances with wattage and usage hours, set slab tariff rates, and get monthly and annual electricity bills with a full appliance breakdown.
Design a complete off-grid or hybrid solar system. Get panel count, battery bank configuration, and inverter sizing based on your daily load and location sun hours.
Calculate required capacitor bank size to improve power factor, reduce kVA demand, lower energy costs, and estimate payback period on the investment.
Lumen method calculation for number of fixtures, lamps, actual lux level, power density, and annual energy cost. Compliant with IS 3646 / CIBSE guidelines.
Calculate AC capacity in BTU/hr and Tonnes of Refrigeration for any room, accounting for area, height, occupancy, solar exposure, windows, and insulation quality.
Size a DG set for linear, non-linear, and motor loads with demand and diversity factors. Calculate fuel consumption, unit cost, and DG efficiency.
Calculate UPS/inverter rating, battery bank capacity, number of batteries, series-parallel configuration, and charging current for your backup power system.
Calculate 3-phase fault current at transformer secondary, main distribution panel, and sub-distribution board. Determine minimum cable size to withstand Isc.
Compare two transformers on Total Owning Cost (TOC), annual losses, CO₂ emissions, and payback period. Data-driven procurement decisions.
Calculate sub-transient short circuit current at the DG synchronous panel for one or multiple parallel generators. Based on IS standard using sub-transient reactance (%Xd"). Determines Zg per DG, equivalent parallel impedance, fault kVA and Isc in kA.
For mixed DG sets, add each unique rating. All DGs of same rating just change count above.
Two calculation methods in one: Method A — Area/Footcandle method (sq.ft based, quick sizing) and Method B — Lux/Room Index method (L×W×H, reflection factors, utilisation factor per IS 3646 / CIBSE).
Determine if lightning protection is required for a structure as per IS:2309. Calculates collection area (Ac), probable strikes per year (P), overall risk factor (xc = M×P) vs maximum acceptable risk, and required number of down conductors.
| # | LOAD NAME | TYPE | DISTRIBUTION BOARD | kW | PF | DEMAND FACTOR | QTY | PHASE |
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