About MoneyMetrica

What MoneyMetrica does

The calculator collection covers income and salary conversions, take-home pay estimates, savings, investment and retirement scenarios, debt payoff, and mortgage planning. Business tools cover profit margins, return on investment, break-even, EBITDA, and unit economics. General tools handle percentages, dates, age, and tips.

MoneyMetrica provides informational tools. It does not provide banking, lending, credit, mortgage brokerage, investment management, or professional advisory services.

How our calculators work

Each calculator applies defined mathematical formulas, modelling assumptions, or financial rules to the values you supply. Calculator pages include a formula explanation, common questions, and relevant next steps. Some tools, particularly in the mortgage and debt collections, provide additional assumptions, limitations, or worked examples.

Most calculations run in your browser. The Mortgage Calculator uses a calculation service to produce its estimate and report. See the Privacy Policy for how inputs and optional measurement are handled.

Calculation methodology

Understand the assumptions

Inputs such as interest rates, contribution amounts, loan terms, and payment timing determine what a model includes. Review the explanation on the individual calculator; different tools include different costs and assumptions. For example, the Mortgage Calculator separates principal and interest from estimated taxes, insurance, HOA dues, and PMI.

Follow the calculation

Formula explanations make the arithmetic understandable. For example, hourly pay multiplied by hours per week and weeks per year gives an annual salary equivalent. More complex tools model balances over time, such as monthly loan amortization or compound growth.

Compare scenarios, not predictions

Financial projections answer questions about the values and assumptions entered. An assumed investment return or inflation rate is not a forecast, and a retirement withdrawal guideline is not guaranteed income.

Check time-sensitive rules

The Take-Home Pay Calculator uses a configured tax year and describes its tax assumptions. The underlying tax-rule configuration records source references. These rules are maintained in the product rather than retrieved as live tax data. Review the stated year and check current official guidance before relying on a result. The site does not promise an automatic update schedule.

Testing and quality checks

Automated tests check calculation behaviour against expected results, including selected boundary cases such as zero interest, negative returns, and payments that cannot repay a balance. Regression tests help detect unintended changes. Other checks cover input handling, calculator registration, and links.

Type checks and production builds provide additional checks on the site. These checks help identify problems; they do not guarantee that every result is correct or appropriate for every situation.

Financial calculator limitations

Financial results are estimates. Actual outcomes may differ because of lender payment rules, fees, interest-rate changes, insurance costs, tax circumstances, eligibility requirements, market conditions, and the assumptions you enter. A mortgage affordability estimate is not a loan approval. Business estimates should be reconciled with actual accounting records.

The calculators are educational and informational tools, not individualized financial, investment, tax, accounting, mortgage, or legal advice. Read the Financial Disclaimer and Terms of Use for further limitations.

U.S. assumptions and general calculations

Percentage and other mathematical tools are not inherently U.S.-specific. Some financial tools use U.S. assumptions: take-home pay models federal income tax and FICA with an entered state-tax estimate, while 401(k) and Roth IRA tools model U.S. retirement account scenarios.

The retirement account projections do not determine eligibility or enforce all contribution, catch-up, or plan-specific rules. Check each calculator’s methodology and limitations, especially before using a financial result in another jurisdiction.

How to interpret results

1. Check your inputs, including units, dates, rates, and payment periods.

2. Read the formula, assumptions, and limitations on the calculator page.

3. Compare scenarios by changing one assumption at a time where useful.

4. Verify important decisions with current official sources or an appropriately qualified professional.

Calculator presentation standards

Calculator pages explain their purpose, label their inputs, provide methodology and common questions, and link to related tools. Financial estimates are accompanied by limitations. Calculation tests and regression checks support changes to the tools.

The amount of supporting detail varies by calculator. An explanation of a model is not a claim of independent certification, professional review, or guaranteed accuracy.

Corrections and feedback

Mortgage professionals can report suspected calculation errors, outdated assumptions, or unclear explanations through the existing mortgage professional feedback form. That form is intended for professional product feedback. Do not include borrower information or private financial details.

If a result appears inconsistent, recheck the inputs and methodology and verify it independently before using it for a decision.