Know the numbers behind every sale.
Free calculators for online sellers, freelancers, and small businesses to understand pricing, advertising costs, and true profitability — before you commit to a sale.
Free to use • No signup required • Transparent formulas
Featured calculators
The first tools we're building, starting with the questions online sellers ask most often.
E-commerce Profit Calculator
See your true profit per sale after product cost, fees, shipping, and ad spend.
Break-Even ROAS Calculator
Find the minimum return on ad spend you need to stay profitable.
Product Pricing Calculator
Set a price that covers your costs and hits your target margin.
Etsy Fee & Profit Calculator
See your real Etsy profit after listing, transaction, payment processing, and Offsite Ads fees.
eBay Fee & Profit Calculator
See your real eBay profit after Final Value Fees, insertion fees, and Promoted Listings.
Amazon FBA Profit & Fee Calculator
See your real Amazon FBA profit after the referral fee, FBA fulfillment fee, and fuel surcharge.
3PL Fulfillment Cost Calculator
Turn your actual 3PL quote into a true monthly fulfillment cost, cost per order, and cost per unit.
Shopify Profit & Fee Calculator
See your real Shopify profit after Shopify Payments or third-party processing fees.
Dimensional Weight Calculator
Calculate DIM weight and billable weight for UPS, FedEx, USPS, or a custom divisor.
TikTok Shop Fee & Profit Calculator
See your real TikTok Shop profit after the referral fee, creator/affiliate commission, and your own costs.
Amazon FBM Profit & Fee Calculator
See your real Amazon FBM (seller-fulfilled) profit after the referral fee, selling-plan fee, and your own costs.
Walmart Marketplace Profit & Fee Calculator
See your real profit on a seller-fulfilled Walmart Marketplace sale after the referral fee and your own costs.
Walmart Fulfillment Services (WFS) Profit & Fee Calculator
See your real profit on a WFS-fulfilled Walmart Marketplace sale after the referral fee, WFS fulfillment fee, and your own costs.
Marketplace Fee Comparison Calculator
See your modeled profit side-by-side across six major sales channels, using the same formulas as our dedicated fee calculators.
Fulfillment Cost Comparison Calculator
Compare modeled outbound fulfillment cost per order across Amazon FBA, Walmart WFS, a 3PL, and self-fulfillment.
Browse by category
Calculators are grouped around the decisions sellers actually make.
How it works
Enter your numbers
Add your costs, fees, and revenue. No sign-up required.
See the real breakdown
Every calculation shows its formula and assumptions, not just a final number.
Make a better decision
Use clear results to price, spend, and sell with more confidence.
Built to be transparent
Calculators are only useful if you can trust the math behind them. Here's how we approach that.
- Every formula is shown, not hidden.
- Assumptions are stated clearly next to every result.
- Calculations are tested for accuracy.
- Marketplace and platform fee data will be sourced and dated, not guessed.
- You can see exactly how each number was calculated.