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Is reverse osmosis worth it? RO cost calculator
Work out the true cost per gallon of an under-sink RO system (system + filters + membrane) and the payback vs bottled water. Every assumption is editable and uses cited ranges -- this is a decision tool, not a sales pitch.
$0.13RO cost per gallon
$141RO annual cost
$1,173Annual savings vs bottled
0.2 yrPayback vs bottled
At these numbers, RO costs less per year than buying the same gallons bottled.
- RO rejects water to drain (brine). At a typical 3:1-to-1:1 reject ratio a few product gallons add a modest water/sewer cost -- material on a well/septic or a high-tariff utility.
- Cost per gallon falls fast as daily gallons rise: RO wins clearly vs bottled for a household that actually drinks filtered water, and loses if you would barely use it.
- RO removes minerals too; a remineralization stage adds filter cost. These are cited ranges, not guarantees -- enter your real prices.
Where to buy Search Amazon for: an under-sink reverse-osmosis system
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