Overcalculates vs Overcalculated - What's the difference?

As verbs the difference between overcalculates and overcalculated

is that overcalculates is (overcalculate) while overcalculated is (overcalculate).

(head)

(overcalculate)

(overcalculat)

To calculate as being greater than is actually the case

*{{quote-book, 1822, , Some Passages in the Life of Mr. Adam Blair, page=135, section=Chapter XI citation

, passage=Meanwhile, Mr. Blair began, as anxious people will do, to overcalculate the lapse of time. }}

*exaggerate *overestimate *overstate

(head)

(overcalculate)