ROASStack
Free Client-Side Advertising Simulator Suite
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Stop Guessing Your Ad Scaling ROAS & Net Margins

Precision financial modeling & scaling calculators for media buyers, growth marketers, and direct-to-consumer founders.

Micro-Tools & Simulators

15 Dedicated E-Commerce Calculators

Most Popular

Meta & TikTok ROAS Calculator

Calculate exact Break-Even ROAS, Target Scaling ROAS, Allowable CPA, and projected monthly net profit before launching ad campaigns.

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Essential

Shopify & E-Com Net Margin Matrix

Uncover hidden platform fees, 3rd party payment gateway penalties, app subscriptions, FX markups, and refund losses.

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FBA Pro

Amazon FBA & PPC Margin Estimator

Simulate Amazon referral fees, FBA pick & pack size tiers, storage fees, returns, and PPC TACoS to find true net margins.

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CRO Engine

A/B Testing Statistical Significance

Determine if your landing page or ad creative variant has reached true statistical significance using two-tailed Z-score modeling.

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High Impact

LTV : CAC Payback Simulator

Model cohort retention decay, gross vs. net LTV, LTV:CAC health ratio, and exact months to recoup customer acquisition cost.

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Search Ads

Google Ads Max CPC & tROAS Bid

Calculate your exact maximum allowable cost-per-click bid ceiling, target ROAS multiplier, and quality score bid discount factor.

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Retention

Email & SMS Retention ROI Calculator

Simulate list monetization, open & click decay, campaign frequencies, Klaviyo/SMS tool costs, and Revenue Per Recipient (RPR).

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New

Dropshipping Profit Margin Calculator

Calculate true dropshipping net profit after supplier COGS, ePacket/private line shipping, gateway fees, and paid ad CPA.

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Essential

Customer Acquisition Cost (CAC) Calculator

Calculate fully-loaded Blended CAC vs Paid Media CAC by incorporating software, creative production, and agency retainers.

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Unit Econ

LTV : CAC Ratio Calculator

Evaluate unit economic health, sustainable payback runway, and scale readiness across DTC cohorts and recurring subscriptions.

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Retention

Email Marketing ROI Calculator

Model subscriber list value, open and click conversion funnels, ESP software expense, and revenue per subscriber.

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TikTok Ads

TikTok Ads Budget & CPM Calculator

Reverse-engineer required monthly and daily TikTok advertising budgets based on target CPM, CTR, CVR, and allowable CPA.

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Amazon PPC

Amazon PPC ACOS Calculator

Calculate Amazon Advertising Cost of Sales (ACOS), Total ACOS (TACoS), and break-even thresholds after FBA and referral fees.

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SaaS & DTC

Subscription Churn Rate Calculator

Compute customer churn, retention percentages, customer lifetime in months, and annualized recurring revenue lost to churn.

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Visual Ads

Snapchat & Pinterest Ads Calculator

Forecast swipe-up clicks, pin engagement, CPA ceilings, and projected ROAS for visual discovery advertising campaigns.

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Curated Tactical Guides

Featured Growth & Media Buying Playbooks

View All 12 Tactical Playbooks →
Financial Matrix

E-Commerce Financial Glossary

Master the core mathematical formulas, industry benchmarks, and scaling economics.

Browse Full 15-Term Glossary →
ROASPaid Media

Return on Ad Spend

Return on Ad Spend (ROAS) is a foundational performance marketing metric measuring gross revenue generated for every dollar invested in advertising campaigns. Expressed as a multiplier (e.g., 3.5x) or percentage (350%), it reflects top-line advertising efficiency across platforms like Meta, Google, and TikTok.

ROAS = \frac{\text{Attributed Ad Revenue}}{\text{Advertising Spend}}
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MERPaid Media

Marketing Efficiency Ratio (Blended ROAS)

Marketing Efficiency Ratio (MER), also known as Blended ROAS or Marketing Efficiency Rating, measures overall marketing efficiency by dividing total store revenue across all channels by total combined marketing spend.

\text{MER} = \frac{\text{Total Net Store Revenue (Shopify)}}{\sum (\text{Meta Spend} + \text{Google Spend} + \text{TikTok Spend} + \text{Agency/Influencer Fees})}
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CACUnit Economics

Customer Acquisition Cost

Customer Acquisition Cost (CAC) is the total dollar cost required to acquire a single new paying customer. It encompasses advertising spend, creative production, software, and marketing team overhead divided by total new customers acquired.

\text{CAC} = \frac{\text{Total Marketing \& Acquisition Expenses}}{\text{Count of Unique New Customers Acquired}}
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POASUnit Economics

Profit on Ad Spend

Profit on Ad Spend (POAS) measures gross profit generated for every advertising dollar spent. Unlike traditional ROAS which measures top-line revenue, POAS reveals bottom-line profitability after deducting product costs (COGS) and variable fees.

\text{POAS} = \frac{\text{Attributed Gross Profit (Revenue} - \text{COGS} - \text{Variable Fees)}}{\text{Advertising Spend}}
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Engineering Excellence

Built for High-Velocity Media Buying

100% Client-Side

Zero backend round-trips. Calculations re-compute at 60 FPS instantly as you adjust sliders.

Total Margin Privacy

Your proprietary COGS, ad spend, and revenue figures never leave your local browser memory.

No Login Walls

Never be forced to create an account or provide an email to run simple financial models.

Client PDF Reports

Export clean, branded PDF summary reports in 1-click for brand audits and agency pitch decks.

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First-Party Attribution
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Analytics & Attribution

Multi-touch attribution and real-time pixel tracking for Meta, TikTok, and Google Ads media buyers.

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Ad Creative Intelligence
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Creative Research

Save, organize, and build high-converting ad swipe files from TikTok and Facebook Ad Library.

Free 7-day full access pass
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Frequently Asked Questions

All ROASStack simulators use verified e-commerce and media buying mathematical formulas, incorporating standard credit card transaction fees (2.9% + $0.30), Amazon FBA weight tiers, and two-tailed Z-score distributions for statistical significance.