When can the us constitutionj be changed?

The U.S. Constitution can be changed through a process called amendment, which can occur in two ways: either by a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of state legislatures. Following this, amendments must be ratified by three-fourths of the state legislatures or by conventions in three-fourths of the states. This process ensures that changes reflect a broad consensus across both federal and state levels.