Engineering Calculator

AC Electricity Bill Calculator

Calculate AC consumption using tonnage, star rating, inverter type, hours and electricity tariff.

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AC Cost Audit

Understand how tonnage, star rating and runtime affect cooling cost.

Live calculator

Input Details

Fill what you know. If a value is unknown, keep the practical default and verify the nameplate later.

Number of ACs

AC Capacity

AC Type

Star Rating

Hours Per Day

Days Per Month

Electricity Rate (â‚¹/kWh)

How to use this result

AC estimated watts are adjusted by tonnage, inverter/non-inverter type and star rating. Actual compressor cycling depends on room heat load, outdoor temperature and set temperature.

This is a preliminary planning estimate. For certified audits, use site measurement and nameplate readings.

FAQ

Why is AC estimate not exact?

AC compressor cycles. Room size, insulation, temperature and maintenance change actual consumption.

Should I buy inverter AC?

Only if usage is high enough. The page shows saving but payback depends on purchase price difference.

Before replacing an AC

Check filter cleaning, thermostat setting, room insulation and runtime first. Replacement should be decided with ROI, not only star rating.

Accuracy note

The result is a planning estimate. Use nameplate wattage, measured runtime and current tariff for professional-level accuracy.