Ecommerce Calculators
Run your numbers before you run your ads. Our free ecommerce calculators cover Amazon FBA fees, profit margins, ROAS, AOV, and everything else online sellers need to make profitable decisions.
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Amazon & Marketplace
FBA fees, Amazon profit, referral fees, and break-even ACOS
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ROAS, AOV, conversion rate, and revenue projections
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Flipkart Commission Calculator
Estimate seller fees, net revenue, profit, or marketplace costs
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Amazon Break-Even Price Calculator
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Amazon FBA Fee Calculator
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Amazon FBA ROI Calculator
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Amazon PPC Break-Even ACoS Calculator
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Amazon Profit Calculator
Estimate Amazon unit economics with referral fees, fulfillment costs, storage, returns, and net profit per unit.
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Amazon Referral Fee Calculator
Estimate Amazon referral fees by category, fee base, and marketplace selling assumptions.
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Amazon Storage Fee Calculator
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Average Order Value Calculator
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Cart Abandonment Revenue Calculator
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Dimensional Weight Calculator
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eBay Fee Calculator
Estimate eBay insertion fees, final value fees, per-order charges, and seller net proceeds before product cost.
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eBay Profit Calculator
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eBay Seller Fees Calculator
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Ecommerce Break-Even ROAS Calculator
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Ecommerce Profit Calculator
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Etsy Ads ROAS Calculator
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Etsy Fee Calculator
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Etsy Listing Fee Calculator
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Etsy Profit Calculator
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Etsy Seller Fees Calculator
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Etsy Transaction Fee Calculator
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Flipkart Profit Calculator
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Flipkart Seller Fee Calculator
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Flipkart Seller Fees Calculator
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Flipkart Shipping Fee Calculator
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Free Shipping Threshold Calculator
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Inventory Holding Cost Calculator
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Lazada Seller Fee Calculator
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Marketplace Fee Calculator
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Marketplace Price Calculator
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Meesho Seller Profit Calculator
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Myntra Seller Fee Calculator
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PayPal Fee Calculator
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Product Profit Margin Calculator
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Razorpay Fee Calculator
Estimate Razorpay platform fees, GST on fees, and net settlement per payment.
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Refund Loss Calculator
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Return Rate Impact Calculator
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Shipping Cost Calculator
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Shopee Seller Fee Calculator
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Shopify Fee Calculator
Estimate Shopify payment fees, transaction charges, and net revenue per order.
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Shopify Fees Calculator
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Shopify Profit Calculator
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Stripe Fee Calculator
Estimate Stripe processing fees, extra card charges, and net revenue per transaction.
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TikTok Shop Fee Calculator
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UPI MDR Calculator
Estimate merchant discount rate, platform fees, and net settlement for UPI payment scenarios.
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Walmart Marketplace Fee Calculator
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WooCommerce Profit Calculator
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Ecommerce Glossary — Key Terms Explained
- ACOS (Advertising Cost of Sales)
- Amazon PPC metric: Ad Spend ÷ Ad Revenue × 100. Break-even ACOS = Profit Margin %. If you make 30% margin, your break-even ACOS is 30%. Below that = profitable ads.
- ROAS (Return on Ad Spend)
- Revenue generated per pound/dollar of ad spend. ROAS = Revenue ÷ Ad Spend. A 4× ROAS means £4 revenue per £1 spent. Target ROAS varies by margin — higher margin businesses can sustain lower ROAS.
- AOV (Average Order Value)
- Total Revenue ÷ Number of Orders. Increasing AOV (via bundles, upsells, or minimum order thresholds) is often the fastest lever for revenue growth without additional traffic costs.
- FBA (Fulfilled by Amazon)
- Amazon's fulfilment service where sellers ship inventory to Amazon warehouses. Amazon picks, packs, ships, and handles returns. Fees include fulfilment fee (weight-based), storage fee, and referral fee (% of sale price).
- Conversion Rate
- The percentage of visitors who complete a purchase. Ecommerce conversion rate = Orders ÷ Sessions × 100. Average ecommerce conversion rate: 1–3%. Above 3.5% is considered strong.
Frequently Asked Questions
How do Amazon FBA fees work?
Amazon FBA charges: (1) Referral fee: 6–15% of sale price depending on category; (2) Fulfilment fee: based on product size and weight, typically $3–8 for standard size; (3) Storage fee: monthly charge per cubic foot. Use the FBA calculator to see your exact costs before listing.
What is a good profit margin for Amazon FBA products?
After all Amazon fees (referral, FBA, advertising), most successful FBA sellers target 20–30%+ net margin. Margins below 15% leave little buffer for price competition or fee increases. Products with margins below 10% after fees are difficult to make work profitably.
What ROAS should I target for my ads?
Target ROAS depends on your margin. If your gross margin is 40%, you need ROAS above 1/0.40 = 2.5× just to break even on ad spend (before other costs). Profitable campaigns typically target 3–5× ROAS for most products, higher for low-margin categories.
How do I increase my ecommerce conversion rate?
High-impact improvements: better product photography, faster page load times, simplified checkout (reduce steps), clear return policy, customer reviews, and mobile optimisation. Even a 0.5% conversion rate improvement on 10,000 monthly visitors generates 50 additional orders per month.