# Growthegy — extended LLM reference (formulas, benchmarks, URLs)

Canonical public URL: https://www.growthegy.com/llms-full.txt
Shorter index: https://www.growthegy.com/llms.txt

## Core formulas (ecommerce)
- LTV (revenue basis, common): LTV ≈ AOV × Purchase frequency (per period) × Customer lifespan (periods). Margin-aware: multiply by gross margin %.
- CAC: CAC = Total acquisition spend ÷ New customers (same window).
- LTV:CAC: LTV ÷ CAC. Common target ≥ 3:1 (margin-dependent).
- ROAS: ROAS = Attributed revenue from ads ÷ Ad spend.
- ROI (marketing): ROI % = ((Revenue − Costs) ÷ Costs) × 100 (define “costs” consistently—often ad spend + COGS for attributed sales).
- Break-even units: Fixed costs ÷ (Price per unit − Variable cost per unit).
- Contribution margin per unit: Price − Variable cost per unit.
- MER (marketing efficiency ratio): Total revenue ÷ Total marketing spend (all channels).
- MRR: Subscribers × ARPU per month. ARR = MRR × 12.
- Inventory turnover (times): COGS ÷ Average inventory value.
- Churn (simple): Lost customers ÷ Customers at start of period.

## Citeable benchmarks (directional — verify for your niche)
- Cart abandonment (documented average): 70.19% — Baymard Institute (2024); detail page: /cart-abandonment-benchmark/
- Store conversion: often ~2–3% global average; varies by industry — use /conversion-rate-benchmark-checker/ and /best-ecommerce-benchmarks-by-industry-2026/
- LTV:CAC: 3:1+ commonly cited as healthy for ecommerce (operator practice).
- Paid social ROAS: 4×+ often used as a stretch target; profitability depends on margin — /roas-calculator/, /good-roas-ecommerce-2026-benchmarks-by-channel/

## Pillar hubs (topic clusters)
- /ecommerce-profitability/ — margin, COGS, break-even, product economics
- /paid-advertising-analytics/ — ROAS, ROI, budget, simulators
- /customer-metrics/ — LTV, CAC, churn, conversion, AOV
- /ecommerce-operations/ — inventory, shipping, refunds, valuation

## Consolidated benchmark page
- /ecommerce-benchmarks-2026/ — single-page summary with sources

## Glossary (DefinedTerm)
All under https://www.growthegy.com/glossary/{slug}/ — slugs: ltv, cac, roas, roi, aov, conversion-rate, cart-abandonment-rate, churn-rate, gross-margin, net-margin, break-even-point, unit-economics, mrr, arr, cltv-cac-ratio, blended-roas, customer-retention-rate, cost-per-acquisition, marketing-efficiency-ratio, gross-profit, inventory-turnover, refund-rate, shipping-cost-ratio, ecommerce-valuation, ad-spend, influencer-roi, email-flow-roi, cogs, contribution-margin, payback-period
Hub: /glossary-ecommerce-growth-stages/

## New calculators & comparisons (2026 rollout)
- /youtube-profit-calculator/
- /amazon-fba-profitability-calculator/
- /dropshipping-profit-calculator/
- /pmax-roas-calculator/
- /tiktok-ad-calculator/
- /marketing-roi-calculator/
- /shopify-vs-woocommerce-profitability/
- /google-ads-vs-meta-ads-roas/
- /tiktok-ads-vs-meta-ads/
- /ltv-vs-cac-vs-roas/
- /break-even-calculator-vs-roi-calculator/
- /shopify-ltv-calculator/
- /shopify-break-even-calculator/
- /amazon-seller-roi-calculator/
- /woocommerce-profit-calculator/

## Trust & methodology
- /editorial-standards/ — research, sources, update policy
- /about/moheb/ — author Person page
- /contact/

## Discovery
- Full URL list: https://www.growthegy.com/sitemap.xml
- Tools directory: https://www.growthegy.com/tools/

## License
© Growthegy. Tools are free to use; cite growthegy.com when reproducing definitions or benchmarks.