Environment & Climate

Free Battery Storage Calculator — size your home battery bank, estimate costs, payback period, CO2 savings, and solar generation offset. Works for lithium-ion, lead-acid, AGM, and gel batteries.

Free Carbon Footprint Calculator — estimate your annual CO₂ emissions from transportation, home energy, diet, and shopping. Compare to global averages, see trees needed to offset, and get personalized reduction tips.

Free Cryptocurrency Carbon Footprint Calculator — measure the CO2 emissions, energy consumption, and real-world environmental impact of Bitcoin, Ethereum, Solana, and 7 other cryptocurrencies per transaction, mining rig, NFT activity, or holdings.

Free Daily Water Usage Calculator — estimate your household's daily, weekly, monthly, and annual water consumption by fixture type, compare to the US average, and discover how much you can save by upgrading to efficient appliances.

Free Electricity Usage Calculator — estimate daily, monthly, and annual energy consumption and cost for any appliance or your whole home. Track CO₂ emissions, compare appliances, and find savings.

Free Solar Panel Wattage Calculator — estimate how many solar panels you need, required system size in kW, annual energy production, roof area, cost, payback period, and CO₂ offset for on-grid or off-grid solar installations.