Nature Conservancy Carbon Footprint Calculator
This calculator estimates your annual carbon footprint in tons of CO2 from eight quick inputs: home energy bills, driving, flight hours, diet and recycling.
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Pv Watt Calculator
A “PV watt calculator” has to answer two different questions.
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Population Density Calculator
Population density is the number of people living in each unit of land area, and this calculator solves the triangle three ways: density from…
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Hickory Tree Value Calculator
The Hickory Tree Value Calculator prices a standing hickory the way foresters and timber buyers do: it converts trunk diameter (DBH) and merchantable…
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Manure Value Per Ton Calculator
Manure is fertilizer you already own: every ton carries nitrogen, phosphorus and potassium that would otherwise come out of a fertilizer budget.
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Solar Panel Return Calculator
Solar math changed in 2026: the 30% federal residential tax credit ended on December 31, 2025, so new purchases now pay full price.
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Bottle Return Calculator
Nobody returns one kind of container.
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Solar Lease Calculator
A solar lease puts panels on your roof with no upfront cost: you pay a monthly lease payment, usually with a yearly escalator, instead of buying the system.
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Energy Performance Index Calculator
The Energy Performance Index (EPI) is the standard way to compare how efficiently buildings use energy: annual energy consumption divided by floor area, expressed in kWh per square meter per year.
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Emission Rate Calculator
Burning fuel releases carbon dioxide at a rate fixed by chemistry, not by the vehicle or boiler doing the burning: about 8.78 kg of CO2 per gallon of gasoline, 10.21 kg per gallon of diesel, and 5.30 kg per therm of natural gas.
28 tools
Featured tool
Nature Conservancy Carbon Footprint Calculator
Estimates your yearly carbon footprint from home energy, driving, flights, diet, and recycling.
Use calculatorCarbon and energy lead the section. The Nature Conservancy carbon footprint tool gives households a starting point, and solar panel return, solar lease, cost per solar panel, and cost per watt tools let a homeowner weigh a solar decision in money terms as well as energy terms. Energy performance index and PV watt calculations support the same decisions from the building side.
The rest of the section is land and water measurement. Runoff volume, rain volume, and lake volume sit next to soil infiltration, percolation, erosion, and loading rates, with nitrogen and seed rates for fields and evaporation rates for open water. Tree volume, hickory tree value, and manure value per ton bring in the farm and woodland side, while emission rate, diversion rate, and bottle return tools cover waste and pollution. Lightning distance and EMF distance are the outliers here, but they share the same plain measurement approach as the rest of the group.