> ## Documentation Index
> Fetch the complete documentation index at: https://partners.usecharlie.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# ROI calculator.

> Estimate the revenue upside and payback period for a prospect considering Charlie.

Use this when pitching Charlie to a prospect. Walk through the inputs together — monthly GMV, number of locations, current ship-from-store rate — and the simulator outputs the revenue uplift potential, shipping cost savings, and payback period.

All figures are based on what we see consistently across our clients.

<Card title="Open the ROI simulator" icon="calculator" href="https://usecharlie.ai/en-fr/pages/roi-calculator">
  Opens on usecharlie.ai — takes 2 minutes with a prospect.
</Card>

<Card title="Next: The opportunity." icon="arrow-right" horizontal href="/opportunity/unified-commerce-gap">
  See who Charlie is built for and why the timing is right.
</Card>