8 free personal finance calculators — no email, no signup, no paywalls. 💰 Budget (50/30/20 split) 📈 Compound Interest 🏦 Savings Goal 💳 Debt Payoff (avalanche vs snowball) 🚨 Emergency Fund 📊 Net Worth 🏖️ Retirement (25x rule) 📈 Investment Return Built with real 2026 data. Results in seconds. Works on mobile.