Free tools for product testing
Quick calculators for the math you don't want to do by hand: platform fees, ad budgets, and honest margins.
Shopify Fee Calculator
Calculate exactly what Shopify costs you per sale: subscription, transaction fees, and payment processing on every plan tier.
Stripe Fee Calculator
Calculate Stripe payment processing fees by region. US, UK, EU, Canada, Australia — all in one place, plus how to minimize them.
Product Test Ad Budget Calculator
Calculate how much ad spend you need to test a product idea. Inputs: target CPM, conversion rate, and break-even ROAS.
Product Margin Calculator
Calculate your real per-sale profit after product cost, payment fees, ad spend, and platform fees. Honest numbers for product testing.