All calculators
30 tools live now — markup, fees, break-even, and sales tax. Math runs in your browser; fee defaults are estimates you can override.
Markup
Markup vs margin, keystone, and cost-to-price — without swapping the two percentages.
Markup calculatorCost and markup % → selling price, with margin shown beside it. Or work backwards from a price you already charge.Margin vs markup calculatorConvert markup % ↔ margin % on the same deal. Same dollars, different denominator.Retail markup calculatorKeystone or custom multiplier on wholesale cost — shelf price with markup and margin.Profit margin calculatorCost and price → profit margin % (and markup). Or set a target margin and solve for price.
Break-even
Fixed costs, price, and variable cost → units and revenue until you’re covering the month.
Break-even point calculatorFixed costs, price, and variable cost → units until contribution covers the month. Shop math, not loans.Break-even calculatorBreak-even units and sales dollars from the same inputs. Plain arithmetic in your browser.Break-even sales calculatorSales dollars to cover fixed costs from price and variable cost. Shop break-even in revenue.Break-even analysis calculatorUnits and revenue to cover fixed costs, plus profit at an expected volume.Contribution margin calculatorPrice minus variable cost — dollars left to cover fixed costs before profit.Contribution margin ratio calculatorContribution margin as a percent of selling price — for planning break-even from a ratio.
Pricing
Target margin to shelf price, or food cost % from plate cost and menu price.
Product pricing calculatorSet a shelf price from cost and a target margin — and see the markup that goes with it.Restaurant food cost calculatorPlate cost ÷ menu price = food cost %. Ingredients only — not labor.Food cost percentage calculatorFrom plate cost and a target food cost %, back into menu price — or audit a price on the board.Product price calculatorCost plus desired profit dollars → selling price, with markup and margin shown.Cost-plus pricing calculatorClassic cost-plus: add a markup % or target margin on cost to get the selling price.Net profit calculatorRevenue minus the costs you enter — net dollars and net margin. Quick check, not a P&L.Selling price calculatorSelling price from cost and desired profit — as dollars or as a markup %.
Sales tax
Add tax onto a price or pull it out of a total — national or state pages. You type the rate; we don’t look up ZIP.
Reverse sales tax calculatorPull tax out of a tax-included total, or add tax onto a pre-tax price. You type the rate — we don’t look up ZIP.Add sales tax calculatorAdd sales tax onto a pre-tax price. You type the rate — we don’t look up ZIP.Texas sales tax calculator for sellersAdd Texas sales tax onto a price or pull it out of a total. You enter the rate — no ZIP lookup.California sales tax calculator for sellersAdd California sales tax onto a price or pull it out of a total. You enter the rate — no ZIP lookup.Florida sales tax calculator for sellersAdd Florida sales tax onto a price or pull it out of a total. You enter the rate — no ZIP lookup.New York sales tax calculator for sellersAdd New York sales tax onto a price or pull it out of a total. You enter the rate — no ZIP lookup.Washington sales tax calculator for sellersAdd Washington sales tax onto a price or pull it out of a total. You enter the rate — no ZIP lookup.Illinois sales tax calculator for sellersAdd Illinois sales tax onto a price or pull it out of a total. You enter the rate — no ZIP lookup.
Fees
Etsy, Shopify, FBA estimates — and marketing / ad spend ROI.
Etsy fee calculatorRough listing, transaction, and processing fees on one sale. Defaults are estimates — check your seller dashboard.Amazon FBA profit calculatorReferral and fulfillment estimates against cost and sell price. Storage and ads not included.Shopify profit calculatorProduct cost plus a typical per-order processing estimate. Monthly plan not spread in.Marketing ROI calculatorCampaign spend vs attributed revenue. Shop marketing ROI — not rental property.Ad spend ROI calculatorAd dollars in, revenue out — ROI and ROAS for platform ads.
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