ballpark figure

Etymology
Perhaps from the fact that, although baseballs are seldom hit out of the ballpark, they may still land anywhere within a large area.

Noun

 * 1)  An educated guess or estimation within acceptable bounds.
 * No more stalling. Give me a ballpark figure of our projected losses.

Translations

 * Czech: přibližný odhad
 * Finnish:
 * French: évaluation approximative
 * German:
 * Hungarian: hozzávetőleges/megközelítő szám/adat/érték/összeg
 * Malayalam:, ഏകദേശ സംഖ്യാ