3 calculators in this category
- Water Softener Sizing CalculatorNSF/ANSI 44 salt-efficiency rating; ion-exchange resin capacity dataA water softener is sized in grains of hardness, not gallons per minute. This calculator multiplies your household's daily…
- Emergency Water Storage CalculatorFEMA / Ready.gov one gallon per person per dayThe federal planning baseline is one gallon of water per person per day, half for drinking and half for food preparation and…
- Appliance Repair vs Replace CalculatorAnnualised cost of ownership comparisonA repair quote and a new-appliance price are not comparable numbers, because they buy different lengths of service. This…
Which one do you need?
- Water Softener Sizing Calculator
- Size a water softener from your household's water use and test-report hardness: daily grain load, capacity between regenerations and yearly salt cost.
- Emergency Water Storage Calculator
- Work out the gallons, containers, shelf weight and rotation schedule your household needs for a two-week emergency water supply, pets included.
- Appliance Repair vs Replace Calculator
- Compare the annualised cost of repairing an ageing appliance against buying new, including energy savings, the 50% rule and the payback period.
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