Margin, markup, payroll and business calculators. — 23 free tools.
Calculate selling price and markup percentage from cost.
★Calculate gross profit margin percentage.
★Find the break-even number of units to sell.
★Calculate return on ad spend (ROAS).
★Calculate cost per click for an ad campaign.
★Calculate cost per thousand impressions (CPM).
★Calculate click-through rate (CTR).
★Calculate conversion rate from visitors and conversions.
★Estimate customer lifetime value (CLV).
★Calculate customer acquisition cost (CAC).
★Calculate the payback period of an investment.
★Calculate net present value of equal annual cash flows.
★Calculate annualized return on investment.
★Calculate straight-line depreciation of an asset.
★Convert an hourly wage into weekly, monthly and annual pay.
★Convert an annual salary into an hourly rate.
★Calculate total pay including overtime hours.
★Calculate sales commission earnings.
★Calculate invoice total with tax and discount.
★Add or remove VAT from an amount.
★Calculate your salary hike percentage and new salary.
★Find your new salary after a percentage hike.
★Calculate profit or loss percentage from cost and sale price.
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Author: CalculatorFC Editorial Team
Reviewed by: CalculatorFC Accuracy Review Desk
Last updated: June 23, 2026
Editorial policy: We explain formulas, assumptions, limitations and examples in plain language and update pages when methods, rates or standards change.
Fact-checking policy: Calculator formulas are reviewed against standard mathematical, financial, scientific or public reference methods where applicable.
Sources: Standard formulas, official government references where relevant, public methodology references and calculator-specific documentation.
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