E-commerce & Seller Calculators & Engineering Tools

Calculate net profit and ROI across Amazon FBA, Etsy, eBay, Shopify, and TikTok Shop with transparent, configurable platform fee structures.

Showing all 14 audited calculators in this discipline

Amazon FBA Profit Calculator

Calculate net profit, margin, and ROI after Amazon FBA fulfillment, referral fees, and ad spend.

Amazon Referral Fee Calculator

Calculate Amazon category referral fees and closing fees across different retail price points.

Etsy Fee Calculator

Calculate Etsy listing fees, 6.5% transaction fee, payment processing, and offsite ads.

Shopify Profit Calculator

Calculate standalone e-commerce profit after Shopify payments (2.9% + 30¢), ad spend, and COGS.

eBay Fee Calculator

Calculate eBay final value fees (typically 13.25% + 30¢), insertion fees, and net profit.

TikTok Shop Profit Calculator

Calculate TikTok Shop referral commissions, creator affiliate payouts, and seller net margin.

Marketplace Break-Even Calculator

Calculate the minimum selling price and unit volume needed to cover all fixed and variable costs.

Product Profit Margin Calculator

Calculate gross profit, net profit margin percentage, and markup percentage on retail items.

ROAS Calculator (Return on Ad Spend)

Calculate ROAS, break-even ROAS, and profit generated from advertising campaigns.

Selling Price Calculator

Calculate the required selling price to achieve your exact desired profit margin or markup.

SaaS MRR, ARR & Churn Rate Calculator

Calculate Monthly Recurring Revenue (MRR), Annual Run Rate (ARR), customer churn rate, and customer lifetime value (LTV).

Email Marketing ROI & Conversion Calculator

Calculate email revenue generated, Return on Investment (ROI), click-to-open rate (CTOR), and cost per lead for email campaigns.

Influencer Marketing & Social CPM Calculator

Calculate effective Cost Per Thousand (CPM), Cost Per Engagement (CPE), and campaign ROI for YouTube, TikTok, and Instagram sponsorships.

Customer Acquisition Cost (CAC) & LTV Ratio Calculator

Calculate blended CAC, paid ad CAC, payback period, and Customer Lifetime Value to CAC (LTV:CAC) sustainability ratio.