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Both calculators run independently — change the inputs on either side to compare results.

Household Water Usage Calculator

Estimate daily household water usage based on showering, dishwasher and laundry loads, household size, and appliance age. Use it to spot the biggest water consumers in your home and prioritize fixture upgrades or behaviour changes.

Daily Shower Time (per person) (minutes)

Household Size (people)

Dishwasher Loads per Week (loads)

Laundry Loads per Week (loads)

Appliance Efficiency

Environment

Solar Panel Savings Calculator

Estimate the payback period of a residential solar PV system based on system size, cost, local sun hours, and electricity rate. Use it to evaluate whether solar investment makes financial sense for your specific location and utility rates.

Solar System Size (kW)

Total System Cost ($)

Peak Sun Hours per Day

Electricity Rate ($/kWh)

Key differences

	Household Water Usage Calculator	Solar Panel Savings Calculator
Category	Environment	Environment
Inputs required	5	4
Result	Daily Water Usage (gallons)	Payback Period (years)
What it does	Estimate daily household water usage based on showering, dishwasher and laundry loads, household size, and appliance age. Use it to spot the biggest water consumers in your home and prioritize fixture upgrades or behaviour changes.	Estimate the payback period of a residential solar PV system based on system size, cost, local sun hours, and electricity rate. Use it to evaluate whether solar investment makes financial sense for your specific location and utility rates.