CalcKitHow to Use the Business Calculators
Profit Margin: enter your selling price (revenue) and total cost. You get your gross margin % — profit as a share of price — and your markup % — profit as a share of cost. Remember: margin and markup are different numbers. A product bought for $60 and sold for $100 has a 40% margin but a 67% markup. Price on margin, not markup.
Break-Even: enter your fixed costs (rent, salaries — costs that don't change), your price per unit and your variable cost per unit (materials, packaging). The calculator shows how many units you must sell to cover everything, and the revenue that represents. Every unit after break-even is contribution toward profit.
Ad ROI: enter what you spent on ads and the revenue those ads produced. You get ROAS (revenue ÷ spend, e.g. 4.0x), ROI % ((revenue − spend) ÷ spend), and net profit. The honest rule: ROAS only tells half the story — subtract product and delivery costs too before calling a campaign profitable.
Run all three together once a month. If margin is thin, raise prices or cut costs before spending more on ads — advertising a losing product just loses money faster. Need help reading your numbers? Ask for a free consultation.