Seller SuccessLAB
Free tools · India

Seller
Success Lab

Twelve free calculators for Amazon, Meesho and D2C sellers — India and US. Fees, GST, landing cost, returns, sizing and ads, added up so you can see your real profit. No signup, no email.

01 — Amazon

Profit Calculator

Enter your selling price and see the profit left after referral fee, closing fee, GST, shipping, ads and return losses. Breakeven price included.

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02 — Meesho

Profit Calculator

Real margin after commission, seller-borne shipping and a 15–35% return rate. Run this before you set a Meesho price.

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03 — Returns

RTO Loss Calculator

What a returned parcel really costs — two-way freight, packaging and the unit you never recover. Total monthly leak and extra cost per order.

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04 — Apparel

Size Chart Builder

Measure your own pieces, build the chart, print it or paste it into your listing. Size confusion drives most apparel returns.

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05 — Shipping

Volumetric Weight

L × B × H ÷ 5000. A light but bulky parcel costs more than it weighs — see chargeable weight and the real shipping bill.

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06 — Payments

Gateway Fee Calculator

What Razorpay, PayU or Cashfree deduct — gateway fee plus 18% GST — and how much of the order actually reaches you.

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07 — Amazon US

US FBA Calculator

Selling on amazon.com from India? Dollar profit after referral fee, FBA fee, freight, duty and returns — converted to rupees.

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08 — Imports

Landing Cost Calculator

Your supplier quote is not your cost. Add freight, customs duty, surcharge, clearing and last-mile to get the true cost per unit.

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09 — Ads

Break-even ROAS

The exact ROAS you need before ads make money — and whether your current ad spend is actually profitable.

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10 — Listings

Title Grader

Paste your listing title and get a score out of 100: length, keyword position, caps, repeated words and filler.

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11 — Brand

Trademark Class Finder

Which of the 45 classes do you file in? Search your product — apparel is 25, software is 9 or 42, bags are 18.

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12 — Billing

GST Invoice Generator

Build a GST invoice with CGST/SGST or IGST, HSN codes and totals. Runs in your browser, prints straight to PDF.

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Ran the calculator? Now let's look at your listing.

A free 10-point audit of your Amazon or Meesho listing — title, images, size chart, pricing and returns. Message us on WhatsApp, we reply within 24 hours.

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Coming soon
Barcode & SKU Label Maker