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By Ravi Sheth — sold $12M+ of hot tubs online before launching this site.
Free hot tub tools that help you decide — not just shop
Ten calculators built for the hard parts of hot tub ownership: choosing right, sizing right, paying the real cost, and not getting fleeced. No signup. No drip campaign. No upsells.
Most hot tub websites are catalogs with affiliate buttons. We built calculators because the questions buyers actually have are math questions: what does it really cost to run? Will it fit through my gate? Is the cheap tub really cheaper over 10 years? The tools below answer those without you having to guess.
Buying decisions
Use these before you spend any money.
Hot Tub Finder Quiz
Answer 8 questions, get a curated shortlist from our 69-tub catalog.
Hot Tub vs Swim Spa
Six questions. Get a clear recommendation with reasoning.
What Size Hot Tub Do I Need?
Right-size by household + space. Pushes you down, not up.
Hot Tub Value Score Checker
Rate any tub on the same 8 factors we use. Public version of our methodology.
Cost & financing
The numbers that matter beyond sticker price.
Operating Cost Calculator
Real monthly + 10-year electricity and chemical cost.
10-Year Total Cost of Ownership
Purchase + operating + repairs. The number listings underplay.
Cover Replacement Cost Estimator
What a quality cover should cost vs dealer markup.
Financing / Monthly Payment
Real monthly payment + total interest on dealer vs credit union financing.
Practical use
For owners and pre-owners.
Delivery Clearance Checker
Will the tub fit through your gate? Find out before you buy.
Chemical Dosing Calculator
Exact doses for bromine, pH, alkalinity, calcium hardness.
Why we built these
I sold $12M+ of hot tubs online before launching this site. The single biggest pattern in pre-purchase questions: buyers wanted math, and got vibes. So we built tools that show the math — with our methodology and assumptions exposed so you can pressure-test them.
If you find a number you disagree with, hit the contact form on our about page. We update the models with new data quarterly.