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Mortgage Calculator
Calculate monthly payments, total interest, and amortization schedules for any home loan.
BMI Calculator
Check your Body Mass Index and understand your health category instantly.
Compound Interest
Project investment growth over time with compound interest and regular contributions.
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Homebuyer Toolkit
Mortgage, affordability, closing costs, and rent vs buy analysis
Tax Season 2026
Income tax, capital gains, HSA, and self-employment estimates
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401k projections, Roth conversions, FIRE targets, and DCA planning
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ROI, break-even, unit economics, and customer acquisition cost
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About SuperCalc
SuperCalc is a comprehensive online calculator platform with 208+ professional-grade tools for finance, tax, real estate, health, business, and more. Get instant, accurate results without downloads or sign-ups.
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Trusted by financial advisors, accountants, business owners, real estate investors, students, and individuals planning major life decisions. All calculations use industry-standard formulas and current 2026 rates. Your data remains completely private.
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Financial: retirement calculator, 401k, compound interest, investment, savings, net worth, budget, debt payoff
Tax: income tax 2026, capital gains, self-employment tax, payroll, W4, estimated tax, 1099
Real Estate: mortgage, home affordability, refinance, rent vs buy, property tax, amortization
Business: ROI, profit margin, break even, sales tax, markup, conversion rate, CAC
Health: BMI, calorie, pregnancy, body fat, due date, ovulation, tip, age calculator