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Clear inputs, reliable math, and useful explanations.

Investment

Estimate growth from an initial investment and monthly contributions.

Convert growth over a period into an equivalent annual rate.

Estimate annualized yield to maturity from price, coupons, and term.

Value future cash flows today using a chosen discount rate.

Find the annual rate that sets a cash-flow series' NPV to zero.

Statistics and economics calculators are planned for a later phase.