SEER Rating Chart + Calculator (How Much $ Saved With Higher SEER?)

SEER is a metric for the general energy efficiency of air conditioners.

If you don’t already know what it means, don’t worry. You’ll find out here – keep in mind that you need to understand what SEER means and what is a good SEER before you go shopping for air conditioners.

What does SEER mean? 

SEER stands for ‘Seasonal Energy Efficiency Ratio’. It is a standard HVAC metric that will tell you how well an air conditioner will perform during the summer season (energy-wise, obviously).

While the EER rating will tell you the efficiency of an air conditioner at perfect conditions (95°F), the SEER rating gives you performance efficiency during the whole summer season (65°F to 104°F), according to the following equation:

SEER = (1 × EER100% + 42 × EER75% + 45 × EER50% + 12 × EER250%)/100

How to find the SEER rating on the AC unit?

Every air conditioner should have a SEER rating in the list of specifications:

seer rating of 18 on a mini split air conditioner
Example of a mini-split air conditioner with SEER 17.6. That’s a great SEER for an AC unit.

First, we’ll look at what SEER rating means in the air conditioners, how much a better SEER rating AC unit can save you during the summer season, and look at the SEER rating chart.

SEER Calculator For AC Units (What Is A Good SEER Rating?)

When looking at different air conditioners, it’s useful to know the electricity costs associated with the unit. Obviously, SEER ratings in the most important metric when choosing an energy-efficient AC unit. Knowing what a good SEER rating of an air conditioner is essential.

You can use this calculator below to calculate the yearly electricity cost for every air conditioner. We predispose the 1,000h/year operation use and 13,19 cent per kWh to calculate the electricity bill based on BTU and SEER rating:


Electricity cost per year (1000 hours)


A good exercise is to input the BTU of an air conditioner (let’s say 20,000 BTU) and change the SEER rating. Here are the yearly electricity costs for this example for different SEER ratings:

  • 12 SEER = $219,83
  • 14 SEER = $188,43
  • 16 SEER = $164,88
  • 18 SEER = $146,56
  • 20 SEER = $131,90

You can see that picking the 20 SEER air conditioner instead of the 14 SEER one would save you $50+ per year. In 10 years, that’s $500. Even if the 20 SEER costs $200 more, it’s worth the price. Here are, for example, ductless mini-split ACs with SEER ratings above 20. If an air conditioner has a 20+ SEER rating, that is considered an excellent energy-efficient unit. For example, Mr COOL DIY 12k unit has a 22 SEER rating.

You can put in the BTU of your air conditioner, and it’s SEER rating; the SEER calculator will calculate the yearly electricity cost.

You can calculate yourself how much let’s say 18 SEER air conditioner would save you compared to 16 SEER unit.

18 SEER Example: Cost of running 18 SEER 24,000 BTU AC unit for 1,000 hours (kWh = $0.1319).

calculation of electricity bill based on 18 seer rating

16 SEER Example: Cost of running 16 SEER 24,000 BTU AC unit for 1,000 hours (kWh = $0.1319).

calculation of electricity bill based on 16 seer rating

As we can see from the examples, the AC unit with these specifications will cost us:

  • $175.87 per year if the SEER rating is 18.
  • $197.85 per year if the SEER rating is 16.

Based on these numbers, we can calculate that 18 SEER vs 16 SEER difference is $197.85 – $175.87 = $21,98/year. In 10 years, that would be almost $220 difference. Hence, if an 18 SEER air conditioner costs $200 more than a 16 SEER unit, it’s a smart choice to pick the 18 SEER unit.

In the end, you will find a full list of 2 different SEER rating air conditioners compared. Here’s the quick look, more at the end of the article:

difference between one seer rating and another seer rating

What Does SEER Rating Mean In Air Conditioners?

In air conditioners, the SEER rating is a metric that basically gives you an idea of how much cooling effect your AC unit will give you if you power it with a certain amount of electricity (power).

Example: You have a 10,000 BTU portable air conditioner. You’re going to use it for 150 days during the long hot summer; you run it 16h per day.

Let’s calculate how much energy this uses:

This particular AC unit generates 10,000 BTU every hour. How many hours are you running it? Let’s multiply 150 days with 16h per day; that’s 2,400 hours of use per year. In short, we use:

2,400h× 10,000 BTU/h = 24,000,000 BTU/year

We have to divide this number (24,000,000 BTU/year) with the SEER rating to get kWh.

For example, if we have an air conditioner with a SEER rating of 10, we’re looking at 2,400,000 kWh. If, on the other hand, we have an air conditioner with a SEER rating of 20, we’re looking at 1,200,000 kWh (half as much).

How much does that difference in SEER rating save us? Well, let’s calculate. An average price of a kilowatt-hour (kWh) in the US is 13,19 cents.

  • SEER 10 electricity cost: (2,400,000 kWh x 13,19 cents)/1000 = $316,56/year
  • SEER 20 electricity cost: (1,200,000 kWh x 13,19 cents)/1000 = $158,28/year

In short, you can save about $150 per year even with a medium-sized 10,000 BTU portable air conditioner. That is $1,500 in 10 years.

The price of a portable air conditioner is usually below $500. However, as we’ve seen based on SEER rating, an air conditioner with a higher SEER rating can pay off quickly just by how much less electricity it costs.

SEER Rating Chart

Let’s illustrate the difference in yearly electricity costs of using SEER 12, SEER 14, SEER 16 air conditioner. Below is a SEER rating chair with yearly electricity costs. It takes into account:

  • 36,000 BTU air conditioner (3 ton AC unit).
  • 1,000 operating hours per year.
  • Average electricity price of 13.19 cents per kWh.

seer rating chart for comparing seer values of air conditioners

You can see that an air conditioner with SEER 10 will cost 475$/year in electricity cost from the chart. The SEER 20 air conditioner will give you the same cooling effect for 237$/year because it’s more efficient.

The difference between SEER 16 and SEER 14 is, as you can read from the graph, 42$/year. In essence, SEER 16 air conditioner is 13% more efficient than SEER 14.

What Is A Good SEER Rating?

SEER 16 is a good SEER rating for an air conditioner. Anything above that – SEER 18, SEER 20 – is great.

Only old devices made in the 80s and 90s will have a SEER 10 rating. From 2015 onward, most states have regulation in place that guarantees that all new air conditioners should have a SEER rating of at least 13 or 14 (depends on the type of air conditioner and state).

Honestly, if you’re buying an air conditioner that will last for 10 years or more, it is highly recommended to buy one with a higher SEER rating. It might cost $100 more, but you will spend less energy running it, which is good for your pocket and the environment.

What is the difference between 14 SEER and 16 SEER rating?

We can calculate how much more energy-energy efficiency a 16 SEER unit is than a 14 SEER unit. We can calculate 16/14 = 1.143; 16 SEER is 14.3% more efficient than 14 SEER unit.

Let’s say we have a 12,000 BTU device. By using the SEER cost calculator above, we can see that:

  • 14 SEER unit spends $113.05 per year.
  • 16 SEER unit spends $98.93 per year.

That means the difference in the electricity bill would be about $15 every year. You can use the 16 SEER vs. 14 SEER calculator here to give you an idea of which one is better for your specific situation.

To answer ‘what SEER rating should air conditioner should you buy’ is straightforward: Buy the one with the higher SEER rating. In 10 years, a high SEER unit’s higher price will pay for itself in saved electricity costs. 

Example: Let’s look at 3 zone mini-split systems with 20+ SEER rating. The difference between the #1 Senville mini-split (SEER = 22.5) and the #2 Mitsubishi (SEER = 19.2) is rather large. Such a difference can create a $200+ difference in a yearly electricity bill.

I hope this SEER calculator is helpful. If you have any problems using it, you can write to us in the comments below, and we’ll look at how we might help.

X SEER vs Y SEER Savings (Full Table)

Based on 1,000h per season run time, air conditioner capacity of 24,000 BTU, and $0.1319 kWh cost, we have prepared a full comparison table of different SEER rating pairings.

Running a low SEER rating AC unit costs more (in electricity dollars) than running a high SEER rating air conditioner. Here is the full SEER savings estimation table:

Pairing 1st SEER Cost 2nd SEER Cost Cost Difference
10 SEER vs 13 SEER $316.56 $243.51 +$73.05
10 SEER vs 14 SEER $316.56 $226.11 +$89.45
10 SEER vs 15 SEER $316.56 $211.04 +$105.42
10 SEER vs 16 SEER $316.56 $197.85 +$118.71
12 SEER vs 14 SEER $263.80 $226.11 +$37.69
12 SEER vs 16 SEER $263.80 $197.85 +$65.95
12 SEER vs 19 SEER $263.80 $166.61 +$97.19
13 SEER vs 14 SEER $243.51 $226.11 +$17.40
13 SEER vs 16 SEER $243.51 $197.85 +$45.66
13 SEER vs 20 SEER $243.51 $158.28 +$85.23
14 SEER vs 16 SEER $226.11 $197.85 +$28.26
14 SEER vs 18 SEER $226.11 $175.87 +$50,24
14 SEER vs 20 SEER $226.11 $158.28 +$67.83
15 SEER vs 16 SEER $211.04 $197.85 +$13.19
16 SEER vs 17 SEER $197.85 $186.21 +$11.64
16 SEER vs 18 SEER $197.85 $175.87 +$21.98
16 SEER vs 20 SEER $197.85 $158.28 +$39.57
17 SEER vs 18 SEER $186.21 $175.87 +$10.34
17 SEER vs 19 SEER $186.21 $166.61 +$19.60
17 SEER vs 20 SEER $186.21 $158.28 +$27.93
18 SEER vs 14 SEER $175.87 $226.11 -$50.24
18 SEER vs 16 SEER $175.87 $197.85 -$21.98
18 SEER vs 20 SEER $175.87 $158.28 +$17.59
19 SEER vs 16 SEER $166.61 $197.85 -$31.24
19 SEER vs 20 SEER $166.61 $158.28 +$8.33
19 SEER vs 22 SEER $166.61 $143.89 +$22.72
20 SEER vs 14 SEER $158.28 $226.11 -$67.91
20 SEER vs 16 SEER $158.28 $197.85 -$39.57
20 SEER vs 22 SEER $158.28 $143.89 +$14.39

If you haven’t found the pairing you were looking for, or if you have any questions regarding the SEER rating, you can pose them in the comments below.

10 thoughts on “SEER Rating Chart + Calculator (How Much $ Saved With Higher SEER?)”

  1. I’m seeing estimates to go up additional 2 in SEER it costs an extra $1000, not just $200 more, from 13 to 16 or 16 o 18. It will take more years payback. Guess I’ll choose a 16 SEER.

    • Hello Rick, the $1000 for 2 SEER increase is too much, you’re correct. Usually, such a steep price increase has to do with other upgrades that might justify the price. If it’s exactly the same unit and the only difference is 2 SEER increase, it’s not worth an extra $1,000.

    • Hello Ann, let’s do a bit of calculation, shall we? Let’s presume you run an 36,000 BTU AC unit for 1,000 hours. The cost of electricity is 0.1319 kWh. In this case, you save $48/ year on the electricity bill. In 10 years, that saves you $480. In 20 years, that saves you $960. For a good air conditioning unit, $500 would make sense. Still, $500 is a bit steep. If you give us the BTU and cost of electricity, we can calculate the electricity costs more accurately.

  2. what is ICP and arco aire? I got a quote from a guy on American standard equipment, and this one ? I dont see much information on this brand… can you help me out?
    He offers 13 seer 3 ton, new line set, pad, quick disconnect and coil for 3450 and same stuff with 16 seer for $3850.. all labor and 10 yr guarantee on parts.

    • Hello Dianne, you’re right, Arco Aire is not a well-known brand with an established tradition such as Mitsubishi, for example. As far as the specifications and estimates are concerned, it would be best if you talk with HVAC experts with hands-on knowledge in Arco Aire units. You can check our your local HVAC expert here.

  3. I have a 2-story house approx 25 yrs old with original RUUD a/c. I assume the SEER is 10 or less on each unit. For the 2nd story I received quotes of $10K for a Carrier Infinity series with a SEER of 23.5 or a Carrier 2-stage with a SEER of 16 for $6.2K. For the 1st story the Carrier quotes were $5.5-$4.6K and were all for 16 SEER. Any advice or insight?

    • Hello there, that below 10 SEER unit is really inefficient. For the 2nd story, you’re looking at the 7.5 SEER difference between the Carrier units. The 23.5 SEER unit is 32% more energy-efficient than the 16 unit. Does that justify the $3,800 difference? Depends on how much electricity the devices will use in the next 20 years or so. But, just at the first glance, the 23.5 SEER quote is quite high. Maybe it would be best to get some other quotes from your local HVAC guys to get a more realistic quote. You can fill this form and get some free quotes.

  4. I live in CA and would only use ac maybe 5 to 10 days a year. What should I be looking at to learn about the heating efficiency of the mini splits?


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