Free business calculators
A focused library for small businesses, Etsy sellers, freelancers, consultants, and creators. No signup, no upsell — just the math.
Pricing
Set the right price for products, services, and digital goods.
Cost-plus pricing with retail and wholesale.
OpenCost → wholesale → MSRP with keystone math built in.
OpenProject quote, hourly equivalent, three packaged tiers.
OpenThree pricing tiers, platform fees, break-even count.
OpenReverse-engineer your hourly from a target income.
OpenProfit & margin
Margin, markup, break-even — the core profitability math.
Gross margin, markup, and profit per sale from cost and price.
OpenSelling price from cost and markup %, with margin equivalent.
OpenCost of Goods Sold for any period, plus gross profit and margin.
OpenMargin, markup, or reverse-solve a price from a target margin.
OpenMonthly break-even units, revenue, and timing.
OpenSales & discounts
Discounts, sales tax, VAT, tips — the everyday math at checkout.
Add or remove VAT with standard rates for the UK, EU, and beyond.
OpenAdd or remove sales tax with built-in US state base rates.
OpenTip amount, total, and per-person split. US, UK, and EU presets.
OpenFinal price and savings from one or two stacked discounts.
OpenInvestment
Return on investment, with annualized comparisons.
Platform fees
Marketplace and processor fees, line by line.
Reverse-solve an Etsy listing price from your costs and target margin.
OpenExact Etsy fees on any sale: listing, transaction, processing, offsite ads.
OpenSubscription + processing per sale across Basic, Shopify, and Advanced.
OpenNet payout per transaction with gross-up if you absorb the fee.
OpenCompare & decide
Side-by-side breakdowns to choose the right tool, platform, or pricing approach.
Same profit, two numbers. Conversion table inside.
CompareReal cost per sale at $20, $50, $100.
CompareWhere the headline 2.9% fee diverges.
CompareWhen each pricing philosophy wins.
CompareeRank, Alura, Craftybase compared.
Compare