How long does it take 4 abnormal cells to turn into cervical cancer? 22, had ultrasound 1 yr agopap every 6mnths nothing there just abnormal cells.

No one knows: a clinical cancer has millions or billions of cells, by the time it is detected. (Cells are very tiny) To calculate the time required to go from a few to lots depends on the doubling time,which can varry even in similar tumors.

Keep watching them: It depends HOW abnormal. The protocols for best management of lesions on pap smears have been worked out meticulously. Mildly abnormal cells are best followed, for you perhaps every six months. Should the cells become more abnormal, you'll get a biopsy and perhaps definitive treatment. Don't ask "how long" with the idea of foregoing regular follow-up -- that mistake could well cost your life.

Very variable: As other doctors have stated, there is considerable variability in this process. It is important for you to keep up with the schedule of testing. It may never turn into cancer, God forbid it does, by frequent testing you will catch it before any harm occurs. Wish you the best.