HOME ENERGY, WITHOUT THE GUESSWORK

See what each upgrade could realistically save you.

Free calculators and guides that show the cost, the likely saving, and how long it takes to pay back — with the assumptions and sources on the page. No sign-up, nothing collected.

Calculate my potential savings Find what's increasing my bill

Cutaway illustration of an American home showing rooftop solar, attic insulation, heating and cooling equipment, ductwork and electricity flow.

Start with your own numbers

All four calculators →

Drag the sliders — the estimate updates instantly. Estimate, not a guarantee.

Monthly bill$220

Home size2,000

Rate (¢/kWh)17¢

Upgrades2

Upgrades = smart thermostat, LED, insulation, heat pump… each trims estimated usage.

ESTIMATED ANNUAL COST

≈ $2,640

Possible yearly savings

≈ $320

roughly 12% lower

Rounded estimate — free, no sign-up, nothing collected.

Estimate, not a guarantee.Rounded for guidance. Your figures depend on your home, local rates, and usage.

How we calculate this

Formula: Annual cost ≈ the average of (your bill × 12) and that figure adjusted for home size and local rate. Savings = annual cost × the modelled reduction for the number of upgrades selected (capped at 34%).

Assumptions:

Your monthly bill is representative of the year, not a single peak month.
The home-size adjustment is anchored on a 2,000 sq ft baseline.
Each upgrade contributes a typical reduction drawn from DOE / Energy Star guidance — not a measured result for your home.

Limits: It cannot see your meter, your appliances, or your climate zone. Treat it as a ballpark for prioritising where to look, not a prediction of next year's bill.

Sources: U.S. Energy Information Administration · U.S. Department of Energy

What are you trying to lower?

Pick the cost that bothers you and go straight to the tool or guide that addresses it.

Electricity billFind what's driving it Heating costCompare systems and payback Cooling costEfficiency, sizing, quick fixes Solar paybackSize a system, see the years Smart-home spendingWhat pays back, what doesn't

Guides worth reading first

Why Is My Electric Bill So High? 14 Causes Ranked by Cost
For most homes the biggest drivers are heating and cooling, water heating, and always-on appliances. Together these usually explain the bulk of a surp…
Heat Pump vs Furnace: Which Is Cheaper to Run in 2026?
In most U.S. climates, a modern heat pump costs roughly 30–50% less to run than a gas furnace because it moves heat instead of burning fuel. Furnaces …
What Temperature Should You Set Your Thermostat?
The Department of Energy suggests around 68°F in winter while you're awake, and setting it lower while asleep or out. In summer, set it as high as is …
How Much Does It Cost to Run a Space Heater?
Multiply the heater's wattage by hours used, divide by 1,000, and multiply by your electricity rate. A 1,500W heater run 8 hours a day costs 12 kWh a …

See the full starting path →

How every number here is built

How we frame itCostSavingsPaybackConfidenceNext step

Every figure is a modelled estimate from public data — U.S. Department of Energy, Energy Star, the EIA, and NREL — with its assumptions, limits, and sources printed alongside it. We have not tested products in a lab, and we say so wherever it matters.

Our methodology · Editorial policy · Who writes this