量力

to estimate one's strength

to measure

capacity / quantity / amount / to estimate / abbr. for 量詞|量词[liang4 ci2], classifier (in Chinese grammar) / measure word

power / force / strength / ability / strenuously

to overestimate one's capabilities (idiom)

to assess one's capabilities and act accordingly (idiom); to act within one's competence / One does what one can.

to weigh one's abilities and act accordingly / to act according to one's means / to cut one's coat according to one's cloth

to overestimate one's capabilities