What you will find here
The Business & Finance calculator area groups the calculations used for recurring Business & Finance decisions. Each page explains the model, shows the working inputs and connects the result to related tools and longer form guidance.
Business & Finance calculators
Use this category when you already know the business question but need a consistent way to quantify it. Start with the closest calculator, check the definitions and move to the related pages when the decision requires more context.
Keep calculations comparable by using the same period, unit basis and definitions. A category page is an index into the models, not a substitute for reviewing the assumptions behind a result.
How to choose the right calculator
Begin with the decision, not the metric. Identify what you are trying to change, compare or validate, then select the calculator whose inputs match the question. When two models look similar, review their formula and output definition before choosing between them.
The category also includes variations for more specific searches. Those pages exist when the user intent changes materially, so long form explanations can address a narrower business context without turning one page into an overloaded reference.
SUBCATEGORIES
Narrow the library by subcategory.
Start with the broad category when the decision is still open. Choose a subcategory when you already know the part of the work that needs attention.
CALCULATOR LIBRARY
Business & Finance calculators
Open the calculator that matches the decision you are reviewing. Focused sub-calculators are included where the broader model has a recurring narrower question.
Calculator
Accounts Payable Days Calculator
DPO converts payables relative to annual COGS into days using a 365-day convention.
Calculator
Accounts Receivable Days Calculator
Convert receivables relative to annual credit sales into days under a 365-day convention. Keep this balance-based estimate separate from invoice-level collection history.
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ARPA Calculator
ARPA uses recurring revenue, active accounts.
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Business Loan Calculator
Estimate a regular monthly payment from loan principal, annual interest and term. Fees, insurance and lender-specific charges remain outside the entered model.
Calculator
Business Valuation Calculator
Business Valuation uses annual revenue, valuation multiple.
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CAC Calculator
CAC uses acquisition spend, new customers.
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CAGR Calculator
CAGR is the constant compounded rate connecting the endpoints over the stated years.
Calculator
Churn Rate Calculator
Churn Rate uses customers lost, starting customers.
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Debt Service Coverage Ratio Calculator
Debt Service Coverage Ratio uses net operating income, annual debt service.
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EBITDA Margin Calculator
Express EBITDA as a percentage of revenue. This is an earnings measure before interest, tax, depreciation and amortisation, not a cash-flow calculation.
Calculator
Invoice Calculator
Invoice uses item 1 amount, item 2 amount, tax (%).
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Invoice Late Fee Calculator
Invoice Late Fee uses invoice amount, late fee (%).
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Markup vs Margin Calculator
Markup vs Margin uses cost, selling price.
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Rule of 40 Calculator
Rule of 40 uses revenue growth (%), profit margin (%).
