What it does
Choose one of four preset Florida corridors — Florida's Turnpike from Miami (Golden Glades) to Orlando (I-4), the SR 408 East-West Expressway end to end, Alligator Alley (I-75) from Miami to Naples, or the drive from MIA airport down to Coral Gables — pick your axle count from 2 (a car) up to five, and compare SunPass against Toll-by-Plate, the plate-billing you get with no transponder. The answer is a table: every toll point between the endpoints with its published rate in each column, the per-trip totals underneath, and a plain verdict naming the per-trip difference. It also does the transponder math — tell it how many toll trips you take a month and it divides the price of the transponder you pick by the savings you'd rack up, answering in weeks, in months, or with the minimum trips needed to make it worth it. And one preset has a surprise: the airport-to-Coral-Gables run carries no toll at all, because those expressways appear on no current published rate schedule. The whole tool works in English or Spanish with a toggle.
How the math works
A trip total is the sum of every toll point between the endpoints, at the published schedule for your axle class — no distance guesswork, no flat-rate fudge. Because plate billing is priced above transponder billing everywhere in the data, the verdict line prints exactly how much the transponder saves on that trip, and the payback answer follows from your own trip count. The rate tables ship inside the page, so the calculator runs the same way whether you're on hotel Wi-Fi or a dead-zone stretch of I-75 — offline, in your browser, with nothing to load.
Where the numbers come from
Every rate is a published figure from the two agencies that run these roads: Florida's Turnpike & Expressway (FTE) and the Central Florida Expressway Authority (CFX). Toll Math ships a snapshot pinned to their official rate pages and PDFs, and the page prints the date that snapshot was taken. Toll rates are published rates that change — agencies raise them, retire cash lanes, reclass lanes — so the totals are current as of that printed date, and the tool says so and links the official sources. Toll Math is an independent tool; it is not operated by, affiliated with, or endorsed by FTE or CFX.
Why it exists
Toll questions are "which wallet do I open" questions: is the $4 transponder worth it for a Florida commute, or are you donating to the plate readers trip by trip? The official sites answer some of it, in their own formats, one agency at a time. Toll Math puts the comparison on one screen, in plain English, for the corridors people actually drive — and adds the payback clock, which is the number that decides the question.
Who made it
Toll Math is made by Frank at Kodiak Foundry LLC, a one-person studio in Florida that builds free web tools for the questions nobody hands you a manual for — the rest of the fleet is at kodiakfoundry.com.
Say hello
Corridor requests, rate corrections, or a total you'd like to argue with: [email protected]. A real person reads every message.