Energy efficiency ratio to coefficient of performance
Type a value in EER to get it in COP instantly.
3.517COP
That's 1.1× as efficient as an air-source heat pump, while a modern split air conditioner is 1.08× more efficient. Every kWh of electricity moves 3.517 kWh of heat.
Convert the other way: COP to EER
What it means
How efficient is that?
These are steady-state ratings. Seasonal figures such as SEER and SCOP average over a whole year of weather and cannot be converted exactly from a single rating.
The math
How to convert EER to COP
To convert energy efficiency ratio to coefficient of performance, multiply by 0.293071.
Example: 12 EER × 0.293071 = 3.51685 COP.
In the other direction, 1 COP = 3.41214 EER.
Every unit
Your efficiency in every unit
Tables
EER to COP conversion table
| EER | COP |
|---|---|
| 7 EER | 2.0515 COP |
| 8 EER | 2.34457 COP |
| 9 EER | 2.63764 COP |
| 10 EER | 2.93071 COP |
| 11 EER | 3.22378 COP |
| 12 EER | 3.51685 COP |
| 13 EER | 3.80992 COP |
| 14 EER | 4.10299 COP |
| 15 EER | 4.39607 COP |
| 18 EER | 5.27528 COP |
| 20 EER | 5.86142 COP |
COP to EER conversion table
| COP | EER |
|---|---|
| 7 COP | 23.885 EER |
| 8 COP | 27.2971 EER |
| 9 COP | 30.7093 EER |
| 10 COP | 34.1214 EER |
| 11 COP | 37.5336 EER |
| 12 COP | 40.9457 EER |
| 13 COP | 44.3578 EER |
| 14 COP | 47.77 EER |
| 15 COP | 51.1821 EER |
| 18 COP | 61.4185 EER |
| 20 COP | 68.2428 EER |
Quick answers
Quick answers
- How many COP is 1 EER?
- 1 EER is 0.293071 COP.
- How many COP is 10 EER?
- 10 EER is 2.93071 COP.
- How many COP is 12 EER?
- 12 EER is 3.51685 COP.
The units
About these units
Energy efficiency ratio (EER)
The US rating: BTU per hour of cooling per watt.
Coefficient of performance (COP)
Heat moved per unit of electricity, in the same units.
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