Austin is 26% more expensive than St. Petersburg.
When comparing Austin, TX and St. Petersburg, FL, the overall cost of living indices are 134 and 106 respectively (national median = 100). Rent is $113/month cheaper in St. Petersburg, saving renters about $1,356/year.
Median household income is $18,343/year higher in Austin. Home values also differ significantly — the median in Austin is $512,700 compared to $331,500 in St. Petersburg.
Austin vs St. Petersburg — common questions
Other cost of living comparisons for Austin and St. Petersburg