Free Water Filter Tools
No email required. No brand bias. Every recommendation is backed by NSF certification data and EPA water quality reports.
Contaminant Matcher
Enter your ZIP code to see what contaminants are in your water, then get matched to NSF-certified filters that remove them.
Filter Cost Calculator
Compare the true cost of ownership for any water filter - purchase price plus replacement filters over 1, 3, and 5 years.
RO vs Carbon vs UV
Answer a few questions about your water quality concerns and we'll recommend the right filtration technology for your situation.
Whole-House Sizing Calculator
Calculate the flow rate (GPM) your home needs based on the number of bathrooms, fixtures, and usage patterns.
Well Water Treatment Planner
Select your well water issues and get a recommended multi-stage treatment chain with product suggestions for each stage.
Replacement Filter Tracker
Select your filter system to see when each filter needs replacing, what it costs annually, and where to buy replacements.
About our tools: All recommendations are based on verified NSF/ANSI certifications and EPA water quality data.