Tools
Energy Calculators & Tools
Nine free engineering calculators for energy meter sizing, solar, EV charging, HVAC efficiency, backup-power economics, and audit business cases. Built for Indian conditions, with defaults you can override. No sign-up, no paywall.
EV deployment planning
EV Charger Sizing Calculator
Work out which AC EV charger (3.3 kW to 22 kW) you need and how many, based on dwell time, daily vehicles, and parking size.
Open calculator →EV vs petrol economics
EV Charging Cost Per KM
Calculate EV running cost per km at your electricity tariff. Head-to-head comparison with petrol and annual savings.
Open calculator →Rooftop solar economics
Solar Self-Consumption Calculator
See how much of your rooftop solar is used on site versus exported, and what it is worth under net metering, net billing or gross metering.
Open calculator →Meter specification
Energy Meter Sizing Calculator
Size a 3-phase energy meter for your factory, office, or data centre. Calculator picks CT rating and meter count.
Open calculator →Chilled / hot water / district cooling
BTU Meter Sizing Calculator
Size a BTU meter for chilled water, hot water, or district cooling. Get thermal load in kW and TR, plus a recommended meter and flow-sensor type.
Open calculator →HVAC efficiency
Chiller COP Calculator
Calculate chiller COP, kW/TR and EER from cooling output and electrical input. Benchmark against ECBC 2017 full-load minimums.
Open calculator →Electrical basics
kVA to kW Converter
Convert kVA to kW (and back, plus Amps to kW) with adjustable power factor. Typical PF values for motors, LEDs, chillers included.
Open calculator →Backup-power economics
Diesel Genset vs Grid — Cost Comparison
See exactly how much you pay per kWh from your DG set versus the grid. Fuel, lube, maintenance all in. Indian defaults for April 2026.
Open calculator →Audit business case
Energy Audit ROI Estimator
Estimate the ROI of an energy audit — payback, NPV, IRR, 10-year cumulative savings — from your own savings and capex assumptions.
Open calculator →Why we built these
Energy engineers spend surprising amounts of time rebuilding the same spreadsheets — pipe-to-flow tables, SFC-to-cost conversions, COP from kW/TR. The formulas are simple; the unit conversions and Indian-market defaults are where the friction sits.
These tools are the spreadsheets our application engineers already maintain, turned into public calculators with defaults calibrated to Indian market conditions (diesel ₹92/L, industrial tariff ₹10.5/kWh, grid emission factor 0.727 kg/kWh from CEA, ECBC 2017 chiller minimums). Use them freely — and if you want to skip the spreadsheet and measure the real values continuously, talk to us.