Calculator
SEER Energy Savings Calculator
Show homeowners exactly what a higher-efficiency system saves. Enter the current and new SEER/SEER2 ratings, system size, climate, and electricity rate to get annual dollar savings, cost-reduction %, and simple payback. Free, no signup.
Free
3 tons · 1,800 cooling hrs/yr · $17/100 kWh
Annual energy savings
$413/yr
37.5% lower cooling cost · pays back in 4.4 yrs
Pays back well within equipment life
Current unit — annual cost
$1,102/yr6,480 kWh/yr
New unit — annual cost
$689/yr4,050 kWh/yr
Annual savings
$413/yr2,430 kWh/yr less energy
Simple payback
4.4 yrsPays back well within equipment life
10-year savings
$4,131Before rate inflation — units typically last 15–20 yrs
Industry benchmarks
- Cost savings %
- 1 − old SEER ÷ new SEER
- Payback: excellent
- under 7 years
- Payback: worthwhile
- under 10–12 years
- 2023 federal minimum
- 14 SEER (N) / 15 SEER (S)
- SEER → SEER2
- SEER2 ≈ 0.95 × SEER
Cost savings depend on the old-to-new ratio; a right-sized replacement or a variable-speed compressor can beat the simple 1 − old ÷ new estimate.
What you'll get
Enter the two ratings
Add the existing unit’s SEER (or SEER2) and the proposed higher-efficiency rating — both in the same metric.
Set size, climate, and rate
Add system tonnage, your climate’s cooling hours, and the customer’s electricity rate. Defaults follow US averages.
Show savings and payback
See annual energy savings, cost-reduction percentage, 10-year savings, and simple payback on the price difference.
How it works
- 1
Enter the two ratings
Add the existing unit’s SEER (or SEER2) and the proposed higher-efficiency rating — both in the same metric.
- 2
Set size, climate, and rate
Add system tonnage, your climate’s cooling hours, and the customer’s electricity rate. Defaults follow US averages.
- 3
Show savings and payback
See annual energy savings, cost-reduction percentage, 10-year savings, and simple payback on the price difference.
Why SEER savings numbers close HVAC upgrade sales
A higher-SEER system costs more up front, so homeowners want to see the return. Cooling energy cost is proportional to 1 ÷ SEER, so upgrading from a 10-SEER to a 16-SEER unit cuts cooling energy roughly 1 − 10/16 = 37.5% — real money in hot climates where the system runs 2,000+ hours a year.
This calculator uses the standard method: annual kWh = capacity (BTU/hr) × equivalent full-load hours ÷ (SEER × 1,000), then multiplies by the electricity rate. It reports annual savings, cost-reduction %, multi-year savings, and simple payback so you can turn efficiency into a clear dollars-and-cents pitch. Enter both ratings in the same metric — 2023+ units use SEER2, about 0.95× the old SEER.
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View statesSEER Energy Savings Calculator FAQs
How do I calculate SEER energy savings?
Cooling energy cost is proportional to 1 ÷ SEER. Annual kWh = capacity in BTU/hr × cooling hours ÷ (SEER × 1,000); multiply by your electricity rate for annual cost. Savings = old-unit cost − new-unit cost. As a shortcut, the cost reduction equals 1 − (old SEER ÷ new SEER).
What is the difference between SEER and SEER2?
SEER2 is the 2023 DOE rating standard, measured under higher external static pressure (0.5 in.wg) that better reflects real ductwork. SEER2 is about 0.95 × the old SEER for the same equipment. Enter both the current and new ratings in the same metric so the comparison is apples-to-apples.
What is a good payback period on a SEER upgrade?
Under 7 years is excellent, and under 10–12 years is worthwhile since systems typically last 15–20 years. Payback is heavily climate-driven: the same 14→20 SEER upgrade can pay back in ~7 years in a hot climate but 25+ years where the cooling season is short.
Is this SEER savings calculator free?
Yes. Every tool on CloseCrew is free for HVAC contractors — no account required to run calculations.
