How many Docker containers can be run from a single image?

You can run an unlimited number of containers from a single Docker image. An image is a template, and a container is an instance based on that template. Each container is isolated and can operate independently, so the limit on the number of containers depends only on the host resources (CPU, memory, disk space), not on the image itself.

Example of running two containers from one image:

docker run -d --name container1 myimage

docker run -d --name container2 myimage

Both containers will run in parallel, using the same myimage.