Common business tasks
Compare attributed revenue with total advertising spend.
Open calculator Customer Acquisition Cost CalculatorDivide acquisition costs by the customers acquired on the same basis.
Open calculator Customer Lifetime Value CalculatorModel customer value from margin, retention and purchase behavior.
Open calculator Amazon FBA Profit CalculatorEstimate marketplace revenue, entered costs and fees.
Open calculatorHow to use these calculators
Business metrics are only comparable when their definitions match. Revenue is not profit, ad spend is not total acquisition cost and a customer count can mean new, active or paying customers. Define the numerator, denominator, currency and reporting period before entering values.
Platform fees and advertising metrics also change with product mix, refunds, taxes and attribution rules. Use these tools to reconstruct a statement or test a scenario, then reconcile the result with the platform report and accounting records. A ratio can reveal where to investigate, but it cannot establish why performance changed.
Three checks that change the answer
Align attribution
Revenue and spend must use the same channel, window and campaign scope.
Use contribution margin
Gross revenue can overstate value when fulfillment, returns and variable service costs are material.
Reconcile platform fees
Fee schedules, categories and tax treatment can change; compare the estimate with the current statement.
Before you use the answer
- Use one currency and reporting period.
- Document whether figures are gross or net.
- Keep new and returning customers separate when needed.
- Reconcile estimates with platform and accounting reports.
Browse all 14 business calculators
Every tool calculates in your browser. Pages marked “Reviewed guide” also include topic-specific explanations and source checks.
- ROAS CalculatorReviewed guideMeasure advertising revenue returned for each unit of ad spend.
- Customer Acquisition Cost CalculatorReviewed guideDivide acquisition costs by the number of new customers acquired.
- Customer Lifetime Value CalculatorReviewed guideEstimate gross-profit customer value from order economics, purchase frequency and retention.
- CPM CalculatorReviewed guideCalculate advertising cost per thousand impressions.
- CPC CalculatorReviewed guideCalculate average advertising cost for each recorded click.
- CTR CalculatorReviewed guideMeasure the percentage of impressions that generated a click.
- Conversion Rate CalculatorReviewed guideMeasure the percentage of visits or interactions that completed a defined conversion.
- Stripe Fee CalculatorReviewed guideEstimate a payment-processing fee from user-entered percentage and fixed components.
- PayPal Fee CalculatorReviewed guideCalculate PayPal fees, your net payment or what to charge for a target net. Compare domestic, international and repeated payments.
- PayPal Currency Conversion CalculatorReviewed guideCompare a quoted PayPal exchange rate with another rate and see the amount received, rate difference and separate fees.
- PayPal Withdrawal Fee CalculatorReviewed guideEstimate standard or instant withdrawal fees and the money reaching a bank or card, with minimum and maximum fee rules.
- PayPal Refund Fee CalculatorReviewed guideCalculate the cash left after a full or partial PayPal refund using the original processing fee and any confirmed fee credit.
- Amazon FBA Profit CalculatorReviewed guideModel per-unit marketplace profit from selling price, product cost and editable Amazon-related fees.
- Etsy Profit CalculatorReviewed guideEstimate per-order Etsy profit using editable listing, transaction, payment and advertising fees.
Frequently asked questions
Is ROAS the same as profit?
No. ROAS compares attributed revenue with ad spend and omits many costs.
What costs belong in CAC?
Include the sales and marketing costs that correspond to the acquired-customer count and period you chose.
Can lifetime value be known in advance?
It is an estimate based on observed or assumed retention, margin and purchase behavior.
Why can a marketplace result differ from my payout?
Refunds, reserves, taxes, storage, category fees and timing adjustments may not be represented by the inputs.
Reference starting points
Individual reviewed guides cite the equation or standard used by that calculator. These authorities provide broader context for this collection.