Calcmatic - Showcase Project
Listed December 18, 2025
About Calcmatic
Free profit calculators for 100+ ecommerce platforms, shipping & finance tools
Calcmatic offers 105 free calculators built for online sellers and personal finance. Calculate fees and profits for eBay, Amazon, Etsy, Mercari, Poshmark, StockX, Depop, and 30+ other marketplaces. Includes print-on-demand calculators (Printful, Redbubble), shipping cost estimators (USPS, UPS, FedEx), payment processor fees (PayPal, Stripe, Square), and personal finance tools for mortgages, investments, and taxes. All calculators use accurate 2025 fee structures and formulas. No signup required
Project details
Built with: Cloudflare,Open Next,TailWind,Tanstack,REACT
Website: https://calcmatic.app
Project metrics
Average Monthly Visitors: Under 1K/mo