Every E-commerce selling number, in one free calculator toolkit.

40+ calculators for profit, fees, shipping, compliance and tariffs — free, instant, and no signup. Built for people who sell online.

Browse the tools See free guides →

No sign-upNo paywallYour data never leaves your device

40+free calculators
$0no sign-up
100%in your browser
7marketplaces covered
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Free calculators by marketplace

Newegg, TikTok Shop, SHEIN, Temu, Etsy, Walmart & Wayfair — each suite built for the fees that platform actually has.

Temu seller tools 7

Tariff & landed cost, ACoS, deposit, POD, EPR, GPSR.

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TikTok Shop tools 5

Affiliate commission, FBT vs self-ship, refund, ROAS.

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SHEIN seller tools 5

Profit & commission, FBS vs self-ship, returns.

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Etsy seller tools 5

Ads break-even, offsite ads, listing cost, vs Shopify.

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Walmart seller tools 5

WFS fee & profit, FBA vs WFS, claims, GTIN.

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Wayfair supplier tools 4

CastleGate fees, China→US landed cost, margin.

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Newegg seller tools 5

Landed cost, SBN vs 3PL, margin, cash flow.

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General & sourcing tools 6

MOQ, CBM, volumetric weight, HS code, duty, profit.

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Why sellers calculate with SellHandy

SellHandy is a free toolkit of E-commerce calculators built for online sellers. Each tool turns your own inputs — selling price, product weight, order quantity and marketplace fees — into the profit, landed cost and break-even numbers you need to price, ship and advertise with confidence. No spreadsheets, no sign-up: every calculation runs in your browser.

All rates use published 2026 marketplace fee schedules — transparent and verifiable.

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Private & free

No sign-up, no paywall. Every calculator runs in your browser — the numbers you enter never leave your device.

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7 marketplaces

Newegg, TikTok Shop, SHEIN, Temu, Etsy, Walmart & Wayfair — pick your platform, get the right rates.

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40+ calculators

Profit, fees, CBM shipping, HS codes, import duty, PPC and tariffs — the full decision stack.

Frequently asked questions

Are SellHandy calculators free?
Yes — every tool is 100% free with no sign-up. We cover hosting with lightweight, non-intrusive ads.
Do I need to create an account?
No. Open any calculator and use it instantly. Your inputs are processed locally in your browser and never uploaded to our servers.
Which marketplaces are covered?
Newegg, TikTok Shop, SHEIN, Temu, Etsy, Walmart and Wayfair — across profit, fees, shipping, compliance and tariff tools.
Are the fee numbers exact?
They use published 2026 marketplace rates and are great for planning. Always confirm final figures in the platform's own seller center before committing money.
Is my data private?
Yes. Calculations run entirely on your device — we don't collect, store or transmit the numbers you enter.
How do I calculate Newegg SBN profit margin?
Open the Profit Margin calculator and enter your selling price, cost of goods, shipping and the SBN fulfilment + commission fees for your category. It returns your true net margin and the break-even price after every Newegg charge.
How do I calculate landed cost from China?
Add product cost, freight, CBM-based sea or air shipping, import duty, VAT and last-mile fulfilment. The landed-cost and CBM tools take you from the factory price to the real delivered cost per unit.
What is CBM and how do I calculate shipping volume?
CBM (cubic metre) = carton length × width × height in metres. Multiply by carton count, then compare against a 20ft or 40ft container's capacity to price and plan your shipment.
How do I estimate import duty and tariffs?
Look up your product's HS code, then apply the destination country's ad-valorem rate to the customs value (goods + freight + insurance). The HS Code and Import Duty tools do this per market automatically.
What is break-even ROAS for PPC ads?
Break-even ROAS is the ad efficiency where profit after ad spend hits zero — roughly 1 ÷ your allowable ad-cost ratio. The Break-Even ROAS tool finds the exact ROAS you can survive at on TikTok Shop, Newegg and more.