Global finance decision lab

Calculate. Compare. Understand.

SENNA Finance turns standard financial formulas into clear decisions. Use fast calculators, compare scenarios, inspect assumptions, and export professional results without sending financial inputs to a server.

Explore all 24 tools Try mortgage calculator

24 working tools100% browser calculations0 account required

Popular financial tools

Start with practical calculators for borrowing, debt, investing, property, and business.

View the complete directory

Borrowing

Mortgage Payment Calculator

Calculate principal and interest payments, total interest, and the full cost of a home loan.

Open tool →Borrowing

Home Affordability Calculator

Estimate an affordable home price from income, debt, rates, term, and housing-cost assumptions.

Open tool →Debt

Credit Card Payoff Calculator

Estimate how long a fixed monthly payment will take to clear a credit card balance.

Open tool →Investing

Compound Interest Calculator

Calculate future value with compounding and optional recurring contributions.

Open tool →Business

Business Loan Calculator

Estimate business-loan payment, total cost, effective APR, and debt-service coverage.

Open tool →Business

Break-Even Calculator

Calculate break-even units, break-even revenue, contribution margin, and target-profit volume.

Open tool →

Choose a decision area

Move from a single answer to a connected group of tools for the decision you are making.

Borrowing

Payments, affordability, amortization, APR, and refinancing.

Explore borrowing →

Debt payoff

Credit cards, minimum payments, snowball, avalanche, and consolidation.

Explore debt →

Property

Rent versus buy and loan-to-value planning.

Explore property →

Investing

Compound growth, CAGR, ROI, IRR, NPV, and real returns.

Explore investing →

Business

Business loan cost, coverage, and break-even analysis.

Explore business →

More than a calculator

Each page combines calculation, interpretation, formula evidence, and export.

Scenario comparisonSave up to four alternatives locally and compare the primary outputs.

Professional exportsDownload inputs, results, and schedules as CSV or print a clean PDF.

Global currenciesChange display currency without changing the mathematics.

Formula audit trailReview formulas, assumptions, sources, version, and verification date.

Independent and educational

SENNA Finance is not a lender, broker, investment adviser, or product marketplace. Results are estimates for learning and planning.

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