Angel Investing

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Model an hourly revenue floor from owner pay, overhead, a user-entered annual reserve, billable capacity, and target operating margin.

Calculate the theoretical break-even point and minimum whole sellable units, plus target-profit volume, contribution margin, and signed margin of safety.

Calculate gross profit and operating profit or loss from net revenue, cost of sales, and operating expenses for one consistent period.

Allocate the 168 hours in a seven-day week across work, commute, rest, care and other activities, then save observed and proposed schedules.

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.

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

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.