Power meter may refer to:

• Electricity meter measures electrical energy (electrical power supplied to a residence, business or machine over time)
• Wattmeter measures the electrical power circulating in any electric circuit
• Microwave power meter measures power in a microwave signal
• Optical power meter measures power in an optical signal
• Google PowerMeter is a tool to track a household's energy usage
• A cycling power meter measures the power output of a bicycle rider

• 4.P
• 4-P
• 4 Padres
• 4 PARA
• 4 Para
• 4-part writing
• 4 part writing
• 4-(p-Bromophenyl)-4-(dimethylamino)-1-phenethylcyclohexanol
• 4p detector
• 4P (disambiguation)
• 4Peaks Mountain Challenge
• 4 Peaks Mountain Challenge
• 4-pentalactone
• 4-pentanolide
• 4 Peynirli Pizza
• 4-Phenyl-1,2,4-triazole-3,5-dione
• 4-Phenyl-3-buten-2-one
• 4-Phenylazepane
• 4-phenylazepane
• 4-phenylazoaniline
• 4-phenylcoumarin
• 4-phenylcoumarins
• 4-Phenylfentanyl
• 4-Phenylpiperidine
• 4-phenylpiperidine