Reference only — not financial, legal, or lending advice. Each page states the dataset and year it uses. DotGovSource is an independent private website. It is not affiliated with, endorsed by, or operated by any U.S. government agency.
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Utility belt calculators

Complement the county-level data with high-volume tools that anyone can use.

Inflation Hub

Programmatic CPI pages for every year and category.

Student Loan Simulator

Estimate payments and interest cost based on federal repayment math.

Solar ROI Calculator

Payback period, lifetime savings and return on a solar installation.

USDA Plant Hardiness Zone

Look up the USDA hardiness zone for any ZIP code in the contiguous U.S.