Peer-to-Peer Lending

Project a starting balance and real month-end contributions under annual, semiannual, quarterly, monthly, or daily nominal compounding, with exact deposit and interest reconciliation.

Project deterministic investment growth from a starting value and monthly contributions, with explicit beginning- or end-of-month timing and dollar reconciliation.

Calculate percentages in seven modes with visible formulas, strict input validation, signed percentage change, and symmetric percentage difference.

Calculate total ROI and net gain or loss, then use CAGR for endpoint-only investments or money-weighted IRR for explicit year-end contributions.

Compare an amount across published 2000–2025 BLS CPI-U annual averages or model a clearly labeled constant-rate inflation scenario in either direction.

Calculate fixed-rate loan payments, total interest, amortization, and extra-principal savings. Enter principal, annual note rate, and term; fees are excluded.

Compare debt avalanche and snowball payoff plans with a fixed monthly budget, rolled-over payments, payoff dates, and interest estimates.

Allocate exactly 100% of monthly income, compare non-negative actual spending, expose fixed-dollar extras, and review transparent balances and planning ratios.

Project a future savings balance, solve the month-end deposit needed for a goal, or calculate time to goal with an explicit 40-year not-reached result.