How Much Does It Cost to Run an Evaporative (Swamp) Cooler in India? (2026)
An evaporative cooler is only a fan and a small pump, so it uses a quarter or less of the electricity of an air conditioner of similar cooling capacity. It only works well in dry climates.
A typical evaporative (swamp) cooler (300 W) costs ₹1.80 per hour, or about ₹432.00 per month at 8 hours a day in India. Average running cost
| Wattage | Per hour | Per day | Per month | Per year |
|---|---|---|---|---|
| Low 100 W | ₹0.60 | ₹4.80 | ₹144.00 | ₹576.00 |
| Typical 300 W | ₹1.80 | ₹14.40 | ₹432.00 | ₹1,728 |
| High 800 W | ₹4.80 | ₹38.40 | ₹1,152 | ₹4,608 |
Formula: watts ÷ 1000 × hours × price per kWh. Typical use is 8 h/day for about 120 days a year (the cooling season) ≈ 288 kWh per year.
One hour of an evaporative (swamp) cooler (0.30 kWh) is the same electricity as
- 2.1minutes of electric shower
- 3.0hours of TV
- 20phone charges
- 33hours of an LED bulb
In India, with electricity at ₹6.00 per kWh (source: Typical urban domestic slab rate; national average ≈ ₹5.5/unit FY2025-26, 2026-04), a typical evaporative (swamp) cooler costs ₹1.80 per hour and about ₹1,728 per year at 8 hours a day. Each ₹1.00 of electricity buys roughly 0.6 hours of use.
How to lower the cost of running an evaporative (swamp) cooler
- Open a window on the far side of the room. Swamp coolers need airflow out to work.
- Replace pads each season. Clogged pads cut cooling and make the fan work harder.
- Run the pump a few minutes before the fan so pads are wet from the start.
Frequently asked questions
Is a swamp cooler cheaper to run than AC?
Yes, typically 3 to 5 times cheaper per hour, but it cannot cool a humid room.
How much water does an evaporative cooler use?
Around 10 to 25 litres per hour for a whole-house unit, less for portable ones.
Can I run a swamp cooler all day?
Yes. At 300 watts, 24 hours uses 7.2 kWh, about the same as an AC running two to three hours.
Cost by region
US states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Canadian provinces
Related appliances
- Electric Blanket100 W typical
- Heat Pump (Ducted or Mini-Split)2,000 W typical
- Baseboard Heater1,500 W typical
- Portable Fan (Box or Pedestal)50 W typical
Use the generic electricity cost calculator · Which uses more? Take the quiz