Quote Originally Posted by Antonio1986 View Post
Am I correct?
No. You should prefer phrase "примерная/ориентировочная/приблизительная стоимость" for your example.
"Расчёт" is "calculation", so "расчётный" is "calculated (value)". This word implies professional or scientific approach/work.
It fact "оценочный" is more close to the meaning you think "расчётный" has.