Loading page
About this tool
Estimate monthly and yearly inverter AC electricity cost from tonnage, ISEER, hours of use, thermostat setpoint and your tariff.
This calculator turns an inverter AC's BEE label into a rupee figure on your electricity bill. Average input power is the rated cooling divided by ISEER — 1.5 ton is 5,275 W of cooling, so an ISEER 4.7 unit draws about 1,122 W on average — and that is then adjusted for your thermostat setting using BEE's rule that consumption changes by roughly 6% per degree Celsius from the 24 C reference. Standby draw and servo stabiliser losses are included, so the monthly number is closer to what the meter records than a nameplate wattage.
Open Inverter AC Electricity Cost Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Running at 20 C instead of 24 C multiplies consumption by about 1.26 — the calculator shows that as money, not a slogan.
A 2 W standby draw and a servo stabiliser's ~5% loss are added, so the estimate is not artificially low.
The same inputs produce an hourly rate for a quick sanity check and a season total for budgeting.
Roughly 9 kWh a night for an ISEER 4.7 unit at a 24 C setpoint — about 72 rupees at a tariff of 8 rupees per unit. The average draw works out to about 1.12 kW, so eight hours is close to 9 units.
Yes — BEE puts it at about 6% more electricity for every degree Celsius you drop the setpoint. Going from 24 C to 20 C compounds to roughly 26% more consumption, which on a 2,000 rupee monthly AC bill is about 500 rupees.
Yes, mainly because they run the compressor at part load instead of cycling on and off at full power. In label terms a good inverter split reaches ISEER around 4.7-5.2 against roughly 3.7 for a fixed-speed unit, which is a 20-25% reduction in seasonal consumption for identical cooling.
A little — a servo stabiliser is typically around 95% efficient, so it adds about 5% to the AC's own consumption plus a small idle draw. Most modern inverter ACs have a wide input voltage range and are marketed as stabiliser-free, so check the manual before adding one.
Add the Inverter AC Electricity Cost Calculatorwidget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/inverter-ac-electricity-cost-calculator"
title="Inverter AC Electricity Cost Calculator — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/inverter-ac-electricity-cost-calculator?utm_source=embed&utm_medium=widget">AltFTool — free online tools</a></p>