Precise financial & developer calculators.

Monthly payment, amortization, extra-payment scenarios. Supports US, China, Russia, Indonesia.

Project retirement date with inflation, real returns, and Monte Carlo success rate.

Yield to maturity, clean/dirty price, Macaulay & modified duration, convexity.

Savings growth with contributions, variable compounding, inflation, and tax.

Personal, auto, student, or business loan. Refinance scenario comparison.

Compare returns (1D–1Y) and rolling volatility for any stock, ETF, crypto, or index. 21,000+ symbols.

Keyboard-friendly RPN financial calculator. Works on mobile, no install.

Convert between text and hexadecimal. UTF-8 safe.

Format, validate, minify JSON. Offline & private.

Encode and decode Base64 text & files.