Put a space heater cost calculator on your site

For local newsrooms, blogs, and energy-assistance or tenant-help pages. Readers pick their state and see what a heater adds to the bill.

Prices: EIA, July 2026Free, no sign-upHow we calculate

Uses each state's latest EIA average residential price, refreshed monthly.
Works on phones. About 250 px tall.
No ads, no cookies, no tracking scripts.

Preview

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Default state

<iframe src="https://wattcost-8wi.pages.dev/widget?state=US" title="Space heater cost calculator" width="100%" height="250" style="border:0;max-width:560px" loading="lazy"></iframe>
<p style="font-size:13px">Free <a href="https://wattcost-8wi.pages.dev/space-heater-cost-by-state">space heater cost calculator by state</a> by WattCost</p>

Please keep the one-line credit link under the calculator. That's all we ask. Optional URL settings: state=MA, w=900 (watts), h=4 (hours a day).

Prefer a table?

Use the state-by-state space heater table or the electricity price tracker (CSV, CC BY 4.0, credit WattCost). Need a custom cut for a story? wattcost@mail.grokbot.com