Marketplace Fee & Profit Calculator
See the fees, payout and real profit on a sale for Etsy, eBay, Shopify or PayPal. Enter your own fee rates; Etsy US defaults shown.
Open calculator →
Free · private · instant
Fast business calculators that never see your data
Fast business calculators that never see your data
Utility Toolkit
Every calculator runs entirely in your browser: no sign-up, no cookies, nothing uploaded. Want them offline? Grab the spreadsheet pack.
- Pay once, keep the files
- PayPal, card or Bitcoin
- 30-day fix-or-refund
- No sign-up, no cookies
2ready-made templates
6free browser tools
0data uploaded by the tools
30 daysfix-or-refund
Free tools
All toolsCalculators that run in your browser
Nothing you type is sent anywhere. Each tool shows its method.
Break-even ROAS & Ad Cost Calculator
Find the return on ad spend you need to break even, the most you can pay per sale, and how many sales cover your ad budget.
Open calculator →
Discount & Sale Profit Calculator
Before you run a sale: see the profit per item at the discount and how many extra sales you need just to stand still.
Open calculator →
Price Increase Calculator
Raising prices? See your new profit per sale and the share of customers you could lose before you earn less than today.
Open calculator →
Sponsorship Rate Calculator for Creators
Estimate a starting price for a sponsored integration or dedicated video from your average views and the CPM you charge.
Open calculator →
Engagement Rate Calculator
Work out the engagement rate of a post or video from likes, comments and shares, by views or by followers.
Open calculator →
Templates
Paid templates
For: Anyone running a small online business who needs a quick, private calculation. Open in Excel, Google Sheets, LibreOffice or any PDF viewer. Every price is a one-time payment.
Excel · Sheets
Seller & Creator Calculator Pack (offline spreadsheet)
All six free browser calculators in one offline spreadsheet you can keep and reuse.
$7one-timeView →
Excel · Sheets
Price Increase Planner (Excel / Google Sheets)
Plan a price rise with numbers: break-even customer loss and profit after the change, per product.
$5one-timeView →
Straight answers
Before you buy
What exactly do I get?
An instant digital download: the file(s) listed on each product page. Nothing physical is shipped. Each product page lists what is inside.
How do I pay and receive my files?
Pay with PayPal (or a card through PayPal's checkout where offered) and we email a private download link to your PayPal email, usually within about 15 minutes. Or pay with Bitcoin: send the exact amount shown and email your order code to eclipsekingdom.support@gmail.com; we send your link after one blockchain confirmation. Links work for 30 days.
What if it doesn't work for me?
Email eclipsekingdom.support@gmail.com within 30 days and we'll fix it or refund you. See terms & refunds.
Are the fee numbers up to date?
Defaults are examples dated inside each file and tool (for example Etsy US fees checked 2026-11-14). Platforms change fees, so every rate is an editable input: always use your own current rates.
Is this financial, tax or legal advice?
No. These are general planning tools. For decisions specific to you, talk to a qualified professional.