Planning Calculators

Platform-specific calculators for Amazon, TikTok Shop, Etsy, Shopify, eBay, and Walmart sellers. FBA fees, ACoS, platform fees, ad format selectors, and channel-specific economics.

TikTok Shop Revenue

Margin including fees vs DTC.

Amazon FBA Fees

Full fee breakdown vs DTC.

Amazon ACOS

ACOS, TACOS, breakeven ACOS.

Shopify Plan Comparison

Find cheapest plan for your volume.

Etsy Fee Calculator

Real profit per Etsy sale.

TikTok Shop vs DTC Margin

Side-by-side profit per order across channels.

Amazon vs DTC Margin

Profit per sale: Amazon FBA vs your own site.

Multi-Channel Profit

Profit per order across 5+ sales channels.

TikTok Ad Spend Calculator

Budget needed to hit TikTok conversion target.

Shopify App Stack Cost

Total monthly cost of installed Shopify apps.

Search vs Shopping Budget

Optimal Google Search vs Shopping allocation.

Amazon Inventory Restock

When to reorder based on velocity and lead time.

Meta Ad Format Selector

Google PMAX Budget

Performance Max budget & asset requirements.

Shopify Checkout Benchmark

Your checkout CR vs Shopify averages.

Platform Fee % of Revenue

How much each platform takes in total fees.

About planning calculators

Each ecommerce platform has different fee structures, audience dynamics, and economics. A profitable brand on Shopify can be unprofitable on Amazon FBA at the same prices because the all-in platform tax on FBA is 25-35% of revenue. The calculators in this category quantify the platform-specific math so operators can make accurate channel decisions.

These 16 tools cover the major platforms: Amazon (FBA fees, ACoS calculator, FBA vs FBM economics), TikTok Shop (commission and affiliate math), Etsy (listing + transaction fees), Shopify (subscription tiers, payment processing, checkout benchmarks), eBay (final value fees), Walmart Marketplace (referral fees), and platform-agnostic tools (platform fee % of revenue across all major channels).

The benchmarks: Shopify standalone all-in cost is 3.5-4% of revenue. Amazon FBA all-in is 25-35%. Etsy is 8-12%. TikTok Shop with affiliates is 12-18%. The 26-point spread between Shopify and FBA matters massively at scale — on $1M revenue that's $260K of contribution margin difference. The strategic question isn't which platform "wins" but which platform fits your specific economics, audience strategy, and operational capacity.

The strategic insight: most successful operators run multi-platform with each platform doing what it does best. Shopify for owned audience and brand. Amazon for discovery (especially for unknown brands). TikTok Shop for impulse and creator-driven launches. Etsy for handmade / vintage / personalization. Picking one platform exclusively means leaving meaningful revenue on the table.