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FBA Storage Fee Calculator

Estimate marketplace storage fees from average cubic feet, monthly rate, months, aged inventory, and surcharges.

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Inputs

cu ft
$/cu ft
mo

Your values stay on this device.

Results

Total Storage Fee
Base Storage Fee$117.45
Aged Inventory Fee$12.00
Effective Monthly Cost$43.15

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Assumptions

  • Average cubic feet is multiplied by the user-entered monthly rate and month count.
  • Aged inventory fee is modeled as a per-cubic-foot charge against the aged portion of inventory.
  • Surcharge and removal or disposal fees are editable fixed costs.

Sensitivity preview

Average Cubic Feet -10%: Total Storage Fee $117.71

Average Cubic Feet Current: Total Storage Fee $129.45

Average Cubic Feet +10%: Total Storage Fee $141.20

Formula: Base storage fee = average cubic feet x monthly storage rate x months. Aged inventory fee = aged cubic feet x aged fee rate. Total storage fee = base storage fee + aged inventory fee + surcharges + removal or disposal fees.

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About this FBA Storage Fee Calculator

Storage fees can turn slow-moving inventory into a margin problem. Use this calculator to model monthly storage, aged inventory fees, and other surcharges from the rates you enter.

Who this calculator is for

  • Marketplace sellers planning FBA-style inventory levels.
  • Operations teams comparing storage cost across SKUs or warehouses.
  • Brand owners deciding whether to discount, remove, or replenish inventory.

When to use it

  • Estimate storage cost for a batch of units over several months.
  • Compare seasonal or oversized storage-rate scenarios.
  • Add aged inventory or surcharge assumptions before deciding whether to liquidate stock.

Key assumptions

  • Average cubic feet is multiplied by the user-entered monthly rate and month count.
  • Aged inventory fee is modeled as a per-cubic-foot charge against the aged portion of inventory.
  • Surcharge and removal or disposal fees are editable fixed costs.
  • The calculator does not use live marketplace storage prices.

Accuracy and testing

Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.

View accuracy page

How this calculator works

Base storage fee = average cubic feet x monthly storage rate x months. Aged fee = aged cubic feet x aged fee rate. Total estimated storage fee = base storage fee + aged fee + surcharge + removal or disposal fee.
Base storage fee = average cubic feet x monthly storage rate x months. Aged inventory fee = aged cubic feet x aged fee rate. Total storage fee = base storage fee + aged inventory fee + surcharges + removal or disposal fees.

Inputs explained

Average cubic feet

Average inventory volume stored during the period.

Monthly storage rate

User-entered rate per cubic foot per month for the marketplace, season, size tier, or warehouse scenario.

Aged cubic feet

Inventory volume subject to aged inventory, long-term storage, or similar surcharges.

Surcharge and removal fees

Extra fixed fees such as storage surcharges, removal, disposal, prep, or correction charges.

Understanding your results

The total estimated storage fee shows how much storage cost the inventory batch absorbs under your rate assumptions. Divide it by units stored or units sold to understand the storage burden per unit.

Example scenarios

Seasonal inventory

A seller storing 45 average cubic feet for 3 months can compare normal and peak monthly rates before replenishing.

Aged inventory decision

Adding aged cubic feet and an aged fee rate helps compare storage cost against discounting or removal options.

Key Features

  • Instant Calculation
  • Private & Secure
  • Mobile Optimized

Tips & Best Practices

  • Enter the rate from your seller dashboard or warehouse quote instead of relying on old public fee tables.
  • Model slow-moving units separately from fast-moving units so aged fees do not hide in blended averages.
  • Add storage cost per unit to your product margin model before scaling replenishment.

Glossary of Terms

Cubic foot
A volume measure used by many warehouse and marketplace storage fee models.
Aged inventory fee
An additional charge for inventory that has remained in storage beyond a defined age threshold.
Storage surcharge
Any extra fee layered on top of base monthly storage charges.

Frequently Asked Questions

Does this use current FBA storage rates?
No. Enter the current rate from your seller account or fee schedule because marketplace storage fees change and can vary by product, season, and size tier.
Can I use this for non-Amazon warehouses?
Yes. Enter the warehouse rate per cubic foot, the months stored, and any fixed surcharges to model a similar storage-fee scenario.
Are my storage assumptions sent anywhere?
No. This is a client-side calculation using the values entered in your browser.