Free calculators for online sellers
Work out fees, margins and what your ads can cost before you spend. Fee calculators use each provider's published rates, with the date we checked them.
Profit and pricing
Profit margin calculatorEnter your cost and selling price to get profit, margin and markup, or enter a target margin to get the price you need. Free, no sign-up.Markup calculatorFind your selling price from cost and markup, or the markup from cost and price. Shows the matching profit margin too. Free, no sign-up.Gross margin calculatorEnter revenue and cost of goods sold to get gross profit and gross margin. Works for one product or a whole month of sales. Free, no sign-up.Break-even ROAS calculatorFind the minimum ROAS and the most you can pay per purchase before your ads lose money, from price, product cost, shipping and fees.Dropshipping profit calculatorProfit per order and per month for a dropshipping product: price, supplier cost, shipping, payment fees, ad cost per purchase and monthly app costs.Shopify profit calculatorSee what a Shopify store really keeps: price, product cost, shipping, card fees, ad cost per order, Shopify plan and apps. Free, no sign-up.Customer lifetime value calculatorEstimate customer lifetime value from order value, purchase frequency, lifespan and margin, and check it against your acquisition cost. Free.
Ads
CPM calculatorWork out CPM from ad spend and impressions, or the spend or impressions you need for a given CPM. Also shows CPC and CTR. Free, no sign-up.CPC calculatorGet your cost per click from ad spend and clicks, plus CTR and CPM when you add impressions. Free, no sign-up.CTR calculatorCalculate click-through rate from clicks and impressions for ads, emails or search results. Free, no sign-up.CPA calculatorFind your cost per acquisition from ad spend and conversions, then compare it with what you can afford per order. Free, no sign-up.Conversion rate calculatorCalculate your store's conversion rate from visitors and orders, and see your cost per order when you add ad spend. Free, no sign-up.ROAS calculatorCalculate return on ad spend from revenue and ad spend, with cost per purchase and AOV. Then check your break-even ROAS. Free, no sign-up.
Payment and platform fees
Shopify fee calculatorTotal Shopify fees for a month: plan, Shopify Payments card rates or the third-party transaction fee, per order and as a % of sales. 2026 US rates.PayPal fee calculatorSee PayPal's fee on a payment and what you receive, or what to charge to receive an exact amount. US merchant rates, domestic or international.Stripe fee calculatorStripe's fee on a card payment and what you keep, with international cards, currency conversion and manual entry. Or what to charge to net a target.Whop fee calculatorWhop's fee on a payment, what you keep, and what a withdrawal costs by ACH, wire, instant bank or crypto. Rates from Whop's own pages.Etsy fee calculatorEvery Etsy fee on a sale (listing, transaction, payment processing, Offsite Ads) and your profit after item and shipping costs. US rates, 2026.