Business and finance calculators
Fast, transparent calculations for evaluating returns, pricing, customer economics, loans, software and time. Every tool includes its formula, a worked example and limitations.
Private by designInputs and results stay in your browser.
Assumptions visibleEach formula explains what it includes and excludes.
Built for comparisonCopy results, save a parameterized link or export CSV.
Returns and profitability
ROI CalculatorMeasure what an investment returned after both its upfront and recurring costs, then normalize the result across the time you held it.Open calculator →ROAS CalculatorSeparate the familiar revenue-to-ad-spend ratio from the broader campaign contribution left after creative, agency and tooling costs.Open calculator →Profit Margin CalculatorTurn revenue and cost figures into gross and operating margin without confusing margin with markup.Open calculator →Markup CalculatorCompare markup on cost with margin on selling price, two percentages that are often mistakenly treated as interchangeable.Open calculator →Break-Even CalculatorFind the minimum whole-unit sales volume needed for contribution to cover recorded fixed costs.Open calculator →
SaaS and customer economics
Customer Acquisition Cost CalculatorMeasure the blended sales and marketing cost required to acquire one new customer during a consistent period.Open calculator →Customer Lifetime Value CalculatorEstimate simple gross-profit LTV from monthly revenue, gross margin and customer churn, with an optional CAC comparison.Open calculator →CAC Payback Period CalculatorEstimate how many months of customer gross profit are required to recover the cost of acquiring that customer.Open calculator →MRR and ARR CalculatorNormalize recurring subscription revenue into MRR and ARR without mixing in one-time services or unearned contract value.Open calculator →Customer Churn CalculatorSeparate gross customer churn from net customer growth so newly acquired accounts do not hide losses in the starting cohort.Open calculator →
Finance and time
Loan Payment CalculatorEstimate the payment and amortization path of a fixed-rate, fully amortizing loan, with an optional recurring extra payment.Open calculator →Compound Interest CalculatorProject how an initial balance and end-of-month contributions may grow at a constant annual rate and compounding frequency.Open calculator →Meeting Cost CalculatorMake the direct staff-time cost of a meeting visible without pretending that every expensive meeting is unnecessary.Open calculator →SaaS Total Cost of Ownership CalculatorCompare the visible subscription with implementation, migration, training, administration, price increases and eventual exit cost.Open calculator →Automation ROI CalculatorTranslate a proposed automation into time saved, gross benefit, total cost, ROI and payback while keeping assumptions visible.Open calculator →
How to use these calculators responsibly
Start with values measured over one consistent period, then change one assumption at a time. A calculator makes arithmetic repeatable; it does not make uncertain inputs certain. Use lender disclosures, contracts, accounting records or cohort data for a final decision, and keep a record of which definitions you used.
The tools run locally in your browser. We count anonymous actions such as a calculation or CSV export to understand which tools are useful, but we do not transmit the numbers entered.