Debt Payoff Calculator
Snowball or avalanche? Enter your debts and see both strategies side by side — total interest paid, months to freedom, and the order every debt falls.
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Subscription Audit Calculator
Add up all your subscriptions, flag the ones you barely use, and see what that dead weight would be worth invested over 10, 20, and 30 years.
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Compound Interest Visualizer
Student tool for ages 13-21. Interactive sliders for starting amount, monthly contribution, annual interest rate (1-15%), and years (1-40). SVG line chart shows compound growth vs saving-only side by side. Rule of 72 doubling time. Preset scenarios (first job paycheck, $25/week from age 16, birthday money). ShowMath walks through every formula including A = P(1 + r/n)^(nt). Outputs: final balance, total contributed, total interest earned (the wow number), interest multiplier.
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Working Capital Calculator
Know if your business has enough liquidity to cover short-term obligations. Essential for contractors and freelancers.
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