All Formulas
Explore formula guides that explain the equations, variables, and assumptions behind each calculator.
40 Formulas
Supporting formulas across every calculator category.
All FormulasBusiness FinanceCost Of LivingEbayEtsyFreelancingPersonal FinanceSales FunnelSocial Media Marketing
eBay Fee Calculator FormulaLearn how the eBay Fee Calculator estimates total fees, seller costs, net profit, and profit margin.View formula→eBay Final Value Fee FormulaLearn how an eBay final value fee estimate is calculated from item price, shipping, tax, fee rate, and fixed ord...View formula→eBay Insertion Fee FormulaLearn how estimated eBay insertion fees are calculated from listing count, free listings, per-listing fees, and...View formula→eBay Listing Fee FormulaLearn how to calculate eBay selling fees, total costs, net profit, and profit margin for a single sale.View formula→Etsy Profit Calculator FormulaLearn how the Etsy Profit Calculator estimates profit, margin, total fees, and break-even item price per sale.View formula→Etsy Fee Calculator FormulaLearn how an Etsy fee calculator estimates order revenue, fees, net profit, and profit margin.View formula→Etsy Listing Fee Calculator FormulaLearn how the Etsy Listing Fee Calculator estimates total fees, net profit, and profit margin for a single sale.View formula→Etsy Transaction Fee FormulaLearn how an Etsy transaction fee estimate is calculated from item price, shipping, quantity, and payment proces...View formula→Etsy Payment Processing Fee FormulaLearn how to calculate Etsy payment processing fees, transaction fees, total fees, and estimated net payout for...View formula→Freelance Hourly Rate FormulaLearn how a freelance hourly rate is estimated from income goals, taxes, expenses, billable hours and profit mar...View formula→Freelance Day Rate FormulaLearn how a freelance day rate is estimated from target income, tax, annual costs, buffer, and billable days.View formula→Freelance Project Rate FormulaLearn how a freelance project rate is estimated from income goals, overheads, billable capacity and project time.View formula→