Calculators and U.S. market data
Financial calculators and U.S. market data
Calculate compound interest, federal income tax, dollar-cost averaging, and FIRE targets. View source dates, formulas, and limits on each page.
- No account required
- Formulas shown
- Sources and dates shown
U.S. Treasury data
U.S. Treasury yield curve
Daily Treasury par yield curve rates; the observation date is shown separately from retrieval time. The page keeps the saved values until a newer complete dataset is available.
Six tools
Choose a calculator or data tool
Investment growth
Compound Interest Calculator
Estimate future value from an initial balance, monthly contributions, time, and a fixed annual return.
Open calculator →U.S. federal tax
Income Tax Calculator 2025
Estimate 2025 U.S. federal income tax with IRS brackets and standard deductions.
Open calculator →Monthly investing
DCA Calculator
Estimate future value from fixed beginning-of-month investments and a constant annual return.
Open calculator →Financial independence
FIRE Calculator
Estimate a portfolio target and time to target from spending, savings, contributions, real return, and withdrawal rate.
Open calculator →Technical indicators
Stock Signal Screener
Classify user-entered RSI, MACD, and 200-day moving-average values. No live prices are used.
Open screener →U.S. economic data
U.S. Macro Dashboard
View dated U.S. rates, inflation, unemployment, and Treasury yields from official sources.
Open dashboard →Methods and limits
Check the method and limits
Each calculator lists its inputs, formula, timing rules, exclusions, and worked examples. Review this information before you use the result.
Tax pages cite IRS sources. Market pages show the source and observation date. Investment calculators use fixed assumptions and do not forecast returns.