com·pute / kəmˈpyoōt/ • v. [tr.] (often be computed) calculate or reckon (a figure or amount): we can compute the exact increase. ∎  [intr.] make a calculation, esp. using a computer. ∎  [intr.] inf. seem reasonable; make sense: the idea of an ethic governing what goes on in cyberspace simply does not compute.DERIVATIVES: com·put·a·bil·i·ty / kəmˌpyoōtəˈbilitē/ n.com·put·a·ble adj.com·put·a·bly / -blē/ adv.com·put·ist / -ˈpyoōtist/ n.

compute XVII. — F. computer or L. computāre, f. COM- + putāre clear or settle (an account), reckon, think.
So computation XV, computer XVII.