I'm worried that my penis, which measures 13 cm when erect, might not be enough to satisfy my partner. This is affecting my confidence during sex. Can you tell me what the average length of an erect penis is? I'm just unsure if I fall within the normal range.
The average length of an erect penis is about 12-16 cm (4.7-6.3 inches), so your measurement is well within the normal range. Penile length is less important for sexual satisfaction than confidence, communication, and emotional connection with your partner. You are perfectly normal!