6 calculators
Home Energy
Solar payback, heat pump running cost, and household water usage calculators.
Calculators
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Carbon Footprint Calculator
Estimate annual household carbon emissions from home energy, driving, diet style.
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Heat Pump Cost Calculator
Compare annual heat-pump and gas-boiler running costs from heat demand, SCOP, fuel prices, and standing charges, with separated cost rows.
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Home Energy Bill Calculator
Estimate a whole-home electricity and gas bill from daily usage, unit rates, standing charges, billing days, and optional tax.
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Plug-In Solar Savings Calculator
Estimate balcony-solar bill savings, export-credit value, simple payback, and the impact of higher self-consumption from your own plug-in solar assumptions.
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Solar Battery Payback Calculator
Compare solar-only payback with solar plus battery payback, battery add-on value, break-even time.
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Water Usage Calculator
Estimate household water consumption and annual water bill from occupancy and usage habits, with saving tips.