Made for the decisions
that make a home.

MansionMath gives homeowners practical calculators for buying, owning, renovating, and improving a home. From mortgage affordability to flooring, paint, concrete, energy, and renovation costs, we help you understand the numbers before you spend the money. Whether it’s a starter home or a dream home, the math still matters.

Our method

Calculations use deterministic formulas, not generated guesses. Each calculator explains its method and shows an example. Financial tools use editable assumptions; material tools use your dimensions and product coverage. Displayed amounts are rounded, but calculations keep their precision.

Understand the limits

MansionMath provides estimates for educational purposes. Actual loan terms, taxes, insurance, fees, investment returns, and eligibility may vary.

Home affordability is a budgeting estimate, not a lender decision. Investment forecasts assume steady growth; the mortgage decision tool allows simplified tax assumptions. Fees and actual tax rules need separate review. Construction estimates cannot account for every layout, installation condition, or manufacturer specification. Verify important decisions with current quotes and a qualified professional.

Local assistant

Our local assistant helps select a calculator. For flooring it can recognize dimensions and pass them into the same tested math engine used by the calculator. It does not use a paid AI service, and it never invents financial results.

Privacy and independence

Calculations run in your browser. We do not require accounts, connect to bank accounts, or upload your financial inputs. Vercel Web Analytics measures page visits. There are currently no live advertisements or affiliate links.