Why We Built UnitProfitLab: Replacing Messy Spreadsheets With Honest Unit Math
UnitProfitLab.com was created to solve a painful, recurring problem in e-commerce: founders and media buyers celebrating “3.0x ROAS” inside ad dashboards while their bank balances quietly shrink at the end of every month.
Yassine El Amrani
Founder & Lead E-Commerce Systems Architect • Casablanca / Remote
Performance marketer and full-stack software builder with hands-on experience auditing unit economics, Cash-on-Delivery (COD) fulfillment pipelines, and paid social acquisition models for direct-to-consumer stores across Europe, North America, and MENA.
After auditing dozens of broken Google Sheets across Shopify DTC stores and Cash-on-Delivery (COD) funnels—where hidden variables like VAT, payment FX spreads, unrecovered refund fees, and courier Return-to-Origin (RTO) penalties were routinely left out—we decided to engineer a fast, zero-login web suite that any merchant can use for free in seconds.
100% Open, Audited Formulas
Every simulator on UnitProfitLab displays the exact algebraic equations, variable definitions, and industry benchmark ranges directly underneath the calculator so finance teams can verify every number independently.
Zero-Database Commercial Privacy
Your product COGS, supplier margins, call-center confirmation rates, and ad budgets are confidential trade secrets. All math runs strictly inside your browser—nothing you type into a calculator is sent to our servers.
How Our Calculators & Guides Are Verified
Unlike generic percentage calculators, our five core tools and 14+ unit economics playbooks follow strict management accounting Contribution Margin (CM1, CM2, and Cohort CM3) principles:
- Indirect Tax & Refund Isolation: Sales tax / VAT and expected refund allowances are deducted before calculating Contribution Margin and Break-Even ROAS.
- Real Settlement Fee Schedules: Payment gateway comparisons incorporate cross-border card surcharges, FX conversion spreads, and non-refundable processor fees on returned orders.
- COD Last-Mile Accounting: Cash-on-Delivery models separate unshipped cancelled leads from shipped Returned-to-Origin (RTO) courier fines.
- Contribution-Based LTV: Lifetime Value models measure net variable contribution after recurring COGS and postage—never inflated gross revenue.
Spotted an Edge Case or Want to Suggest a Preset?
Reach out directly—we review every merchant suggestion personally.