Free Tools & Calculators

128 free tools — from tax calculators to typing tests. No sign-up required. Built with federal and state data and refreshed when the underlying agencies publish new figures.

Unlike generic calculators that rely on flat formulas, every tool here draws from primary government sources: IRS tax brackets, HUD Fair Market Rent, USDA income guidelines, CDC health thresholds, and state-specific tax rates across all 50 states. When the IRS updates brackets each January, the income tax and paycheck calculators reflect them. When HUD publishes new fair market rents, the rent affordability tool adjusts automatically.

These tools are built for Americans making real decisions — a first-time homebuyer running mortgage scenarios before an open house, a freelancer estimating quarterly payments before April 15, a parent checking school lunch eligibility, a recent graduate weighing standard versus income-driven repayment, a renter deciding whether buying makes more sense this year.

Every calculator shows its formula, data source, and last-verified date directly on the page. No account required, no email gate. Type your numbers and get an answer.

Browse 10 categories below.

Finance & Tax

37 tools

Filing your taxes? Buying a home? Figure out exactly what you'll owe, save, or qualify for — no signup needed.

Home & Housing

11 tools

Estimating paint for a room, sizing a fence, calculating your electric bill — practical math for homeowners and renters.

Health & Wellness

14 tools

Tracking your fitness, checking a due date, or monitoring your BMI — quick answers for the health questions that come up in real life.

Education

4 tools

Calculating your GPA, checking Pell Grant eligibility, estimating college net price — straight answers for students and parents.

Everyday Tools

16 tools

Tip splits, percentages, unit conversions, date math — the everyday math you shouldn't need a textbook for.

Auto & Driving

4 tools

Estimating gas costs for a road trip, looking up tire sizes, practicing for your DMV test — quick tools for drivers.

Documents & Files

13 tools

Merge, split, compress, or watermark PDFs — all processed in your browser. Your files never leave your device.

Developer & Design

14 tools

Base64, JSON, regex, hex to RGB — developer and designer essentials that save you a Stack Overflow trip.

Interactive

11 tools

Typing tests, pomodoro timers, habit and mood trackers — interactive tools you actually use day to day.

Benefits & Eligibility

4 tools

Medicaid, SNAP, school lunch, ACA subsidy — find out what programs you qualify for in a few minutes.