Tools
Energy Calculators & Tools
Free engineering calculators for energy meter sizing, HVAC efficiency, backup-power economics, and audit business cases. Built for Indian conditions, with defaults you can override. No sign-up, no paywall.
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, EER, and IPLV from cooling output and electrical input. Benchmark against ECBC 2017 and ASHRAE 90.1.
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. BEE PAT and ASHRAE benchmark data.
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 0.72 kg/kWh, ECBC 2017 chiller benchmarks). Use them freely — and if you want to skip the spreadsheet and measure the real values continuously, talk to us.