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HowMuchWatts
50 free calculators for home energy costs & savings
HowMuchWatts is a free suite of 50+ home energy calculators — no signup, no fluff. Work out solar payback, heat pump savings, EV charging costs, and what any appliance costs to run. Every calculator shows its formula and updates as you type. Plus an appliance power-consumption reference chart and plain-English guides.
Hi everyone. I built HowMuchWatts because every "energy cost" calculator online was either oversimplified or buried in ads and signup walls. So I made 50 clean ones that just answer the question - solar payback, heat pumps, EV charging, appliance running costs - and show the exact formula so you can trust the number. Which calculator would you actually use, and what's missing? Everything's free and embeddable if you run a blog. Thanks for looking!
About HowMuchWatts on Product Hunt
“50 free calculators for home energy costs & savings”
HowMuchWatts was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #155 on the daily leaderboard. HowMuchWatts is a free suite of 50+ home energy calculators — no signup, no fluff. Work out solar payback, heat pump savings, EV charging costs, and what any appliance costs to run. Every calculator shows its formula and updates as you type. Plus an appliance power-consumption reference chart and plain-English guides.
On the analytics side, HowMuchWatts competes within Home, Climate Tech and Tech — topics that collectively have 810.6k followers on Product Hunt. The dashboard above tracks how HowMuchWatts performed against the three products that launched closest to it on the same day.
Who hunted HowMuchWatts?
HowMuchWatts was hunted by Ahmad tamimi. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of HowMuchWatts including community comment highlights and product details, visit the product overview.
Ahmad tamimi