Calculators for people who sell online
Margins, fees and ad spend, worked out in your browser. Every calculator shows the formula and a worked example underneath, so you can check our math instead of trusting it.
Pricing and profit
- Profit margin calculator
Cost and selling price in. Profit, margin and markup out.
- Break-even calculator
How many units you have to sell before you make a cent.
- Markup and pricing calculator
Pick the margin you want and get the price to charge.
- Discount calculator
Sale price, and how much margin the discount eats.
Platform and payment fees
- Shopify fees calculator
What Shopify and its payment processing take from one order.
- Amazon FBA calculator
Referral fee by category, plus your FBA fees. Profit, margin and ROI per unit.
- Etsy fee calculator
Listing, transaction and payment fees on an Etsy sale.
- Stripe and PayPal fee calculator
Processing fees on the same sale, side by side.
- Shopify vs Etsy fees
Total fees on one sale on each platform.
Ads and customers
- ROAS calculator
Return on ad spend, and the ROAS you need to break even.
- Customer acquisition cost calculator
What each new customer actually cost you.
- Target CPA calculator
The most you can pay for a sale and still profit.
Shipping and stock
- Shipping cost calculator
What shipping does to the profit on each order.
- Reorder point calculator
When to reorder so you do not run out.
Guides
- Amazon FBA fees explained: referral, fulfillment, storage and the rest
- Break-even ROAS: how much your ads need to bring back
- Etsy fees explained: what Etsy takes from each sale
- Free shipping: who actually pays for it, and how to set a threshold
- How to price a product for an online store
- How to run a sale without losing money
- Margin vs markup, and why mixing them up costs you money
- Shopify fees explained: plans, card rates and the third-party fee
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