SEER ↔ EER ↔ COP Converter
Translate between the three cooling-efficiency ratings (with the SEER↔EER field approximation).
EER is one fixed test point (35 °C); SEER is a weighted season. India's ISEER and Europe's SEER weight differently — compare like with like.
Formula
SEER ↔ EER ↔ COP Converter is a free seer to eer for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About SEER ↔ EER ↔ COP Converter
Translate between the three cooling-efficiency ratings (with the SEER↔EER field approximation). The calculation implements COP = EER/3.412; EER ≈ 0.9×SEER − 0.6; kW/ton = 12/EER (AHRI 210/240; BEE ISEER methodology). EER is one fixed test point (35 °C); SEER is a weighted season. India's ISEER and Europe's SEER weight differently — compare like with like.
How to use SEER ↔ EER ↔ COP Converter
- 1Enter EER (BTU/h per W).
- 2Read COP, SEER (approx), kW per ton instantly — no submit button needed.
Why use SEER ↔ EER ↔ COP Converter?
- ✓Implements the standard formula — COP = EER/3.412; EER ≈ 0.9×SEER − 0.6; kW/ton = 12/EER
- ✓Reference cited on-page: AHRI 210/240; BEE ISEER methodology
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the SEER ↔ EER ↔ COP Converter use?+
It computes COP = EER/3.412; EER ≈ 0.9×SEER − 0.6; kW/ton = 12/EER, per AHRI 210/240; BEE ISEER methodology. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
EER is one fixed test point (35 °C); SEER is a weighted season. India's ISEER and Europe's SEER weight differently — compare like with like.
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the SEER ↔ EER ↔ COP Converter free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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