EcoEnergyCalc

What it does

Free energy cost and carbon footprint calculators. Calculate solar savings, electric bills, carbon emissions, and more — no signup required.

Free calculators for energy costs, solar savings, and carbon footprint — all in one place. Estimate your total annual home energy bill based on location, home size, and usage habits. Find out exactly what's driving your electric bill and where you can cut costs. See how much you save per year by switching to LED bulbs — down to the dollar. Estimate annual heating and cooling savings from upgrading your home insulation. Compare heating and cooling costs by season and find where your energy dollars are going. 80% vs 95% AFUE with venting costs — and whether beating the 2028 rule actually pays. Compare gas, electric, heat pump, propane, and oil heating costs side by side at your local rates.…from ecoenergycalc.com

• 
  Carbon Neutral Website2023 · carbonneutralwebsite.org · ▲107

  Calculate and optimize web page carbon footprint

• 
  Jules2022 · meetjules.com · ▲219

  Offset your carbon footprint entirely

• 
  CarbonSutra2023 · carbonsutra.com · ▲70

  API for estimating carbon emissions of organizations

• 
  YAYZY2020 · yayzy.com · ▲135

  Track the carbon footprint of each purchase in real-time

• 
  Trip to Carbon2019 · triptocarbon.com · ▲144

  A carbon footprint calculation API for travel.

• 
  Crypto Carbon Footprint Calculator2021 · ▲115

  Calculate & offset emissions from your cryptocurrencies

• 
  Lofi Cities – Pixel-art city nights with browser-generated lofi▲319

  Endless lofi beats composed live in your browser, over pixel-art nights in Paris, Tokyo, New York, Hong Kong, Sydney, San Francisco and more. Free, no sign-up.

  Work · 25d ago · loficities.com

• 
  Smooth Recorder▲257

  Mac screen recordings that look edited when you hit stop

  Work · 19d ago · smoothrecorder.com

• 
  Figma Specs▲223

  A container for your context that lives on the Figma canvas

  Work · 3d ago · figma.com

• 
  The rarest tech books and docs you've probably never read▲190

  Work · 13d ago · readrare.com

• 
  Fundraisly▲1,537

  AI fundraising agent that finds investors and books meetings

  AI · Jun 2026 · fundraisly.com

• 
  Homebrew 6.0.0▲1,481

  Today, I’m proud to announce Homebrew 6.0.0. The most significant changes since 5.1.0 are a new tap trust security mechanism, the new faster, smaller, default internal Homebrew JSON API, sandboxing on Linux, better defaults informed by our user survey, many brew bundle improvements, improved performance and initial support for macOS 27 (Golden Gate). Happy to discuss any questions here!

  Dev tools · Jun 2026 · brew.sh

• 
  Performative-UI – A react component library of design tropes▲1,181

  Hi HN! I was super frustrated at apps like tiktok and wechat preventing me from saving or downloading the animated gifs, so I made a little tool to turn a screen recording into a slack-sized emoji. Hope you get some value from this!

  Life & fun · Jun 2026 · vorpus.github.io

• 
  Upstream▲976

  The inbox designed for humans and agents

  AI · Jun 2026 · upstream.do

• 
  Goldfish▲958

  Press Option. It knows your work and replies like you

  AI · Jun 2026 · goldfish.sh

• 
  I made Google Trends for Hacker News by indexing 18 years of comments▲822

  Search 18 years of Hacker News and chart how any topic, tool, or person trended. Overlay terms to compare their rise and fall across 45M posts and comments.

  Life & fun · Jun 2026 · hackernewstrends.com