---
title: "Modify or resize an instance via the OVHcloud Control Panel"
description: "If your instance lacks resources due to increased activity or new needs, you can increase its resources in just a few clicks."
url: https://docs.us.ovhcloud.com/en/public-cloud/compute/modify-resize-instance
lang: en
---
> For AI agents: the complete documentation index is available at https://docs.us.ovhcloud.com/en/llms.txt, the full documentation bundle is available at https://docs.us.ovhcloud.com/en/llms-full.txt.

# Modify or resize an instance via the OVHcloud Control Panel

If your instance lacks resources due to increased activity or new needs, you can increase its resources in just a few clicks.

**Warning:**

**NOTE:** Only upscaling is possible for classic models. In addition, this manipulation causes the instance to be shut down during the operation.

 

## Requirements

- A [Public Cloud instance](https://us.ovhcloud.com/public-cloud/) in your OVHcloud account

### OVHcloud Control Panel Access

- **Direct link:** [Public Cloud Projects](https://manager.us.ovhcloud.com/#/public-cloud/pci/projects/)
- **Navigation path:** `Public Cloud` > Select your project

 

## Instructions

Click `Instances` in the left-hand menu.

Click the _more options_ `⋮` button to the right of the instance and select `Edit`.

**Note:**

You can also access these functions by clicking the instance name and, on the next page, choosing `Edit image →` or `Modify model →`, as applicable.

On the next page, you can modify the [image](#modifying-the-image) or the [template](#modifying-the-template).

 

### Modifying the image

On the next page, scroll to the **Image** section and select your new operating system.

**Warning:**

**NOTE:** B3/C3/R3 instances can use the Windows Operating system. To use this option with OpenStack CLI, you must select a flavor labeled with "win" (i.e., win-b3-8).

The Windows Server license billing is separate from the instance. On your invoice, you will therefore see two separate lines:

1. A line for your instance consumption.
2. A line for Windows license consumption calculated per vCPU.

**Example:** For a B3-16 instance with Windows Server (4 vCores and 16 GB of RAM):

- You will be billed based on the hourly cost of the B3-16 instance.
- Windows license will be billed hourly for 4 vCore.

For better readability, the total price per hour, including instance and license, is displayed directly on our [Pricing page](https://us.ovhcloud.com/public-cloud/prices/#compute).

Once the selection has been made, click `Modify image` to confirm your choice.

 

### Modifying the template

On the next page, scroll down to the **Template** section to select the model of your choice.

**Note:**

For classic models, you can switch to any flavor that has a similar or bigger disk. You can't switch to a model with a smaller disk.

Only **Flexible instances** can be upgraded and downgraded while maintaining a fixed disk size of 50GB.

If your disk is equal to or smaller than 50GB, you can switch to a `Flexible instance`.

**Warning:**

**NOTE:** If you are editing a flex instance, you cannot revert to a classic instance via the OVHcloud Control Panel. For more information, see our [How to revert a flex instance](https://docs.us.ovhcloud.com/en/public-cloud/compute/revert-a-flex-instance.md) guide.

Once the selection has been made, click `Modify template` to confirm your choice.

 

### Resizing a disk in Windows

When performing a resize for a Windows Instance, please note that the partition size is not automatically updated, so you will have to extend it using the **Disk Manager**:

- Right-click on the `Start` menu and launch the disk manager by clicking on `Disk Management`:

- Right-click on the main partition, then click on `Extend Volume`.

- In the **Extend Volume Wizard** menu, click on `Next` to proceed. In the next tab, choose the disk resources to extend and click on `Next`.

  Confirm your choice on the next screen by clicking `Finish`.

- The new disk size will then be displayed in the disk manager.

 

## Go further

Browse all the [Compute guides](https://docs.us.ovhcloud.com/en/public-cloud/compute/landing-page-compute.md).

Browse the rest of the [OVHcloud US documentation](https://docs.us.ovhcloud.com/en/index.md) for guides on our other products and services.

Learn more about [Public Cloud Compute](https://us.ovhcloud.com/public-cloud/compute/) on the OVHcloud US website.