# AI Notebook Billing

<table><thead><tr><th width="324">Billing Logic</th><th>Minimum billable usage</th><th>Time to charge (Deduct credits in balance)</th></tr></thead><tbody><tr><td><p>Based on Usage volume and duration:</p><ul><li><p><strong>GPU kernel</strong>:</p><ul><li>Number of GPUs in a kernel</li><li>Usage duration by seconds</li><li>Kernel status: Idle/ Busy</li></ul></li></ul></td><td>01 second</td><td>Every 15 minutes</td></tr></tbody></table>

**Billing Equation**

* **Usage duration:** Calculated in seconds (Usage is not rounded up).

**Formula**

* **Cost =** <mark style="color:purple;">Usage duration (seconds) \* Item price from the hourly pricing table.</mark>

**Example**&#x20;

You use a kernel with **one H100 GPU (15 CPUs, 250 GB RAM, 1 GPU) and 100 GB Persistent storage** priced at **$2.31/hour** for **30 minutes**&#x20;

* **Usage duration:** 30 minutes =0.5 hours&#x20;
* **Cost:** $2.31/hour  × 0.5 hour = $1.16


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