It's going to depend on how you designed your primers.

If they are:

amplifying a very small (about 100 base pairs) product

located in exon regions, preferably spanning an intron

have 95-105% efficiency in qPCR

Then yes.

In general, primers designed for standard PCR don't meet the basic parameters for qPCR. Typically, the amplified product is too large and/or one or both primers are in an intron/promotor/other non-transcribed region.

Depending on the PCR product. if the product is less than 250bp you can use it for quantitative PCR.