Useful answers without the runaround
Simple US Tools: free calculators and executor guides
Use free calculators and executor tools with clear explanations, fast browser-based results, and no sign-up. Every result includes a clear formula, useful context, and visible limitations.
Built for clarity
- Instant results with no page reload
- Clear formulas, examples, and limitations
- Mobile-friendly and accessible by design
Financial tools
Popular calculators
Get an instant estimate, then review the formula, assumptions, examples, and common mistakes.
Compound interest calculator
Project investment growth with a starting balance, monthly deposits, and adjustable compounding.
Pay raise calculator
Convert a raise into annual and per-paycheck changes, with a rough take-home estimate.
Subscription cost calculator
Add recurring subscriptions and see monthly, annual, and hypothetical invested-alternative costs.
Down payment savings calculator
Estimate the time needed to reach a home down payment with savings and projected growth.
Percentage calculator
Solve percentage-of, what-percent, and percentage-change questions in one place.
Loan Early Payoff Calculator
See how extra monthly payments may change your payoff date and total interest.
Choose a category
Each tool is designed to answer one specific question and explain how the result was calculated.
Saving and investing
Plan long-term growth, future goals, down payments, and income from savings.
Income and work
Compare salary, hourly pay, raises, and simplified after-tax estimates.
Loans and debt
Compare payoff strategies, payment timing, and fixed-rate amortization.
Everyday money
Understand recurring costs, shared bills, rent, habits, and debt payoff.
Business and general math
Answer common percentage and break-even questions with clear formulas.
Executor toolkit
The executor area includes browser-local tools, document generators, and draft state references for estate administration tasks.