Best Amazon FBA Calculators 2026 (Tested & Ranked)

Every successful Amazon seller knows that margin is king. But with Amazon's complex fee structure—referral fees, fulfillment costs, storage rates, and seasonal surcharges—calculating your true profit is harder than ever.

In 2026, a simple spreadsheet isn't enough. You need a tool that accounts for the latest fee changes, shipping weight tiers, and even advertising costs. For a quick calculation, try our free Amazon FBA calculator — no signup required. We've also analyzed the top FBA calculators on the market to help you choose the right one.

What Makes a Great FBA Calculator?

We evaluated these tools based on 3 critical factors:

• Accuracy: Does it use the latest 2026 fee schedules?
• Usability: Is it easy to switch between FBA and FBM?
• Depth: Does it account for ROI, margins, and storage fees?

1. LaunchFast FBA Calculator (Best for Accuracy)

Verdict: The best free tool for quick, accurate estimates without needing a subscription.

We built the LaunchFast calculator (embedded above) specifically to address the "fee drift" seen in other tools. It updates weekly with Amazon's latest rate cards.

• Instant ROI & Margin calculation
• Updated 2026 size tiers
• Completely free, no login required

Beyond the free calculator, Launch Fast offers a full Profit Calculator inside the dashboard. Enter three competitor ASINs and it pulls real marketplace data — current pricing, sales velocity, and FBA fees — so you can model your unit economics against actual competitors. It also includes AI-powered differentiation recommendations that suggest features, materials, and positioning improvements to justify a higher price point.

The Chrome Extension takes it a step further: the profit calculator auto-fills directly from whatever product you're researching on Amazon. Price, weight, dimensions, category, and PPC costs are pre-populated so you can see margins in real time without entering anything manually.

2. Amazon Revenue Calculator (Official)

Verdict: Essential for final validation, but clunky for research.

The official tool from Amazon Seller Central is the "gold standard" for accuracy because it pulls data directly from their backend. However, it requires you to log in and already have a product listing or know the ASIN.

3. Helium 10 Profitability Calculator

Verdict: Powerful Chrome extension for on-page analysis.

Helium 10's tool lives in your browser and overlays data directly on Amazon product pages. It's fantastic for spying on competitors' margins but requires a paid subscription for unlimited use.

4. Jungle Scout Estimator

Verdict: Great for beginners with a simple interface.

Jungle Scout offers a user-friendly web calculator. It's less detailed than LaunchFast or Helium 10 but provides a solid "napkin math" estimate for new sellers.

5. SellerApp FBA Calculator

Verdict: Solid choice for comprehensive data analysis.

SellerApp integrates their calculator with a wider suite of analytics tools. If you're looking for an all-in-one platform, this is a strong contender.

Summary: Which One Should You Use?

For quick, reliable checks while sourcing products, the Launch Fast Free Calculator is your best bet. It combines the accuracy of paid tools with the accessibility of a free web app.

When you're ready to launch, we recommend double-checking your final numbers with Amazon's official calculator to ensure every penny is accounted for.