Every calculator on Water Calculator is written and reviewed by a named, credentialed water professional. Here is the team behind the numbers, and the areas each of them leads.
Water Systems Specialist · Austin, Texas
A Texas-licensed Professional Engineer with 13+ years in residential and light-commercial water systems and 180+ completed projects. John leads the engineering and hydraulics tools — the physics, flow, and pressure calculations where getting the method exactly right matters most.
Leads: Water Science · Flow · Pressure · Pumps · Drainage · Credentials: Texas PE (2016), BS Civil Engineering, Hydraulics (2013)
Water Quality & Sustainability Specialist · Portland, Oregon
An environmental scientist with an MS in Water Resources, 9+ years in residential water quality and treatment, and 150+ assessments. Sarah leads water quality, everyday usage, and long-term cost — the topics that decide whether a system stays effective and affordable year after year.
Leads: Treatment · Usage · Cost · Credentials: MS Environmental Science, Water Resources (2018), BS Environmental Engineering (2016)
We assign topics by expertise, and the named specialist is accountable for the method and the numbers on their pages. Every calculator is built on a recognised standard, verified number-by-number against the live tool, and dated when it is published and updated.
You can read more about our process in our methodology and the standards we hold to in our editorial policy.