Empowering Merchants with Transparent Data

Our Mission

At ProCalcGrid, our mission is to provide merchants, e-commerce founders, freelancers, and sellers with 100% accurate, real-time, and transparent financial calculation tools.

Payment processors and e-commerce platforms often use complicated fee structures with multiple tiers, fixed surcharges, and international markups. We simplify this with fast, privacy-focused calculators.

Our Mathematical Standards

Every calculator on ProCalcGrid is rigorously tested and verified against official developer documentation and published merchant schedules from Stripe, PayPal, Etsy, Shopify, and Square for 2026.