Green & Sustainable Finance Calculators
Evaluate the financial impact of environmentally conscious decisions.
16 free calculators in this category
Battery Storage ROI Calculator
Battery storage break-even year and lifetime return after the install cost is paid off through projected annual savings on bills.
Biomass Boiler ROI Calculator
Calculate biomass boiler ROI by comparing installation cost to annual fuel savings, with the resulting break-even year and lifetime saving.
Bulk Refill vs Individual Packaging
Compare long-term costs and environmental waste between bulk refill products and individual packaged versions with savings calculations.
Carbon Offset Calculator
Annual and lifetime cost of offsetting your CO2 emissions, based on volume, market price per tonne, and any reduction efforts you're already making.
Electric Bike ROI Calculator
Calculate e-bike ROI vs car or public transport — see the payback period from reduced commuting costs at your daily distance and frequency.
Electric Bike vs Car Calculator
Calculate e-bike payback from replacing car commuting and associated vehicle costs, with the annual car-cost offset broken out.
Energy Rating Improvement Cost Calculator
Calculate payback period and net benefit from energy efficiency improvements including bill reduction and property value uplift.
Ethical Shopping Premium Calculator
Calculate the annual premium spent on ethical shopping alternatives versus conventional pricing — see what 'shop your values' costs in pure dollar terms.
Heat Pump Calculator
Heat pump break-even year and lifetime return against gas heating, given install cost and projected annual energy savings.
Heat Pump vs Boiler Break-Even Calculator
Calculate how long a heat pump takes to pay back versus a gas boiler from upfront install cost and annual running cost difference.
Hydropower ROI Calculator
Calculate micro-hydropower ROI from installation cost, annual kWh generated, electricity price, and ongoing maintenance.
Renewable Energy Investment Calculator
Project renewable energy investment value and environmental impact over time horizon. Enter investment amount and return to see final value and total return.
Second Hand Clothing Savings Calculator
Total kept by buying second-hand clothing instead of new across a multi-year period at your typical replacement frequency.
Second-Hand vs New Calculator
Compare cost per year of buying second-hand versus new, including a repair buffer and the expected useful life of each option.
Second Hand vs New Cost Calculator
Calculate annual savings and lifetime impact of buying second-hand vs new across furniture, electronics, clothing, vehicles.
Tidal Energy ROI Calculator
Calculate tidal energy ROI from installation cost, generation capacity, capacity factor, and the price of electricity it offsets.
About Green & Sustainable Finance Calculators
These calculators quantify the costs and potential savings of sustainable choices — from solar panel payback periods and EV ownership costs to carbon offset calculations and energy efficiency upgrades. Each tool models the financial trade-offs of green alternatives against conventional options.