MrFBA Marketplace
MarketplaceGuidesPricing
Sign inJoin free
MrFBA

Amazon FBA training & mentoring — marketplace and PrepKingz as the live ecosystem.

Marketplace

  • Browse leads
  • Top ROI
  • Gems
  • Membership tiers
  • FBA training & mentoring

Guides & learning

  • All seller guides
  • Best FBA categories
  • Free Amazon FBA calculators
  • Keepa wholesale guide
  • Ungating guide
  • Wholesale sourcing
  • Capital compounding

Company

  • About MrFBA
  • Blog
  • Contact
  • Terms
  • Privacy
  • Changelog

Deal of the Week

One vetted Gem lead every Monday — category, ROI range and demand, before it sells out. Free.

© 2026 MrFBA Marketplace. All rights reserved.

Prep & fulfillment by PrepKingz (independent 3PL).

  1. Home
  2. /
  3. Free tools
Version française

Free · no account

Cash-flow velocity simulator

Same margin, different speed. Compare a fast and a slow inventory cycle when every dollar of profit is reinvested.

Cashflow Velocity Simulator
Same margin, different turn speed — see how cycle days compound capital over your horizon.

Fast · 30d (12.2×/yr)

$75,516.50

12.2 turns in 12 mo

Slow · 90d (4.1×/yr)

$12,359.30

4.1 turns in 12 mo

Velocity gap

$63,157.19

Extra capital from the faster cycle

finalCapital = start × (1 + margin%)^(365/turnDays × months/12). Profit fully reinvested each turn.

Frequently asked questions

What is inventory velocity?
It is how fast cash spent on inventory comes back as sales. A 30-day cycle turns your capital about 12 times a year; a 90-day cycle only about 4.
Is this projection realistic?
It assumes every turn sells at the same margin and that all profit is reinvested. Real stores have fees, returns and stock-outs, so treat it as a comparison between speeds, not a forecast.

Turn these numbers into real inventory

MrFBA members get validated Amazon.ca wholesale leads with ROI, Keepa sales and margins — Bronze is free.

Create a free account

Other free calculators

  • Prep center ROI calculator
  • Value equation calculator
  • Credit-card float calculator