Built for Sellers Who Take Margins Seriously
Margitrix is a free, zero-latency suite of e-commerce financial calculators. We help marketplace sellers, DTC brands, and ad buyers make faster, more confident pricing and budget decisions — without spreadsheets.
The Origin Story
E-commerce fee structures are notoriously complex. A single Etsy sale can attract up to four separate charges. An Amazon FBA shipment involves size tiers, referral percentages, and inbound logistics costs that vary by product category. A Meta ad campaign requires a precise understanding of break-even ROAS just to know if it's profitable.
Most sellers resort to manually updating spreadsheets — a slow, error-prone process that delays decisions.
Today, Margitrix is maintained as a free resource for the e-commerce community. We keep the platform ad-supported and independent so sellers of all sizes can use professional-grade financial tools without another SaaS subscription.
Core Values
Six principles that guide every decision we make.
Instant Results
Every calculation runs entirely in your browser using optimized React memoization. Results update the moment you move a slider — no button clicks, no server roundtrips.
Always Accurate
Our formulas are researched and maintained against the latest fee schedules from Etsy, Amazon, Shopify, Stripe, and Meta Ads — updated for 2026 platform changes.
Visual Clarity
Interactive donut charts powered by Recharts make it effortless to see exactly where your revenue goes — from COGS and platform fees to your actual net profit.
Multi-Platform
Whether you sell handmade goods on Etsy, run FBA on Amazon, process payments through Stripe, or scale ads on Meta — we have a dedicated tool for every channel.
Built for Merchants
Designed by e-commerce operators who understand the real pain of hidden fees. Every input field and metric was chosen to answer the questions sellers actually ask.
Growth Focused
From break-even ROAS for paid ads to batch volume projections for POD — our tools help you plan with confidence and scale your margins, not just track them.
The Full Suite
Five specialized calculators covering every major e-commerce channel.