The strength of magnets in an MRI machine is measured in teslas (T). The magnetic field strength of an MRI machine can vary from 0.2 T to 12 T, depending on the type of machine. However, most MRI machines used in clinical settings have magnetic field strengths between 1.5 T and 3 T.

For comparison, here are the magnetic field strengths of some everyday objects:

* Earth's magnetic field: 0.00005 T

* Refrigerator magnet: 0.001 T

* Horseshoe magnet: 0.01 T

* MRI machine (1.5 T): 1.5 T

* MRI machine (3 T): 3 T

* Large particle accelerators (used in physics research): Up to 16 T

The higher the magnetic field strength, the stronger the magnetic field and the more detailed the MRI images can be.