F49 may refer to:

• INS Sahyadri (F49)
• Brazilian frigate Rademaker (F49)

• Scale mail
• Scale modeling
• Scale model sizes
• Scalene
• Scalene muscle
• Scalene Muscles
• Scalene muscles
• Scalenghe
• Scaleni
• Scalenus
• Scalenus anterior muscle
• Scalenus medius muscle
• Scalenus posterior muscle
• Scale of evil
• Scale of measurement
• Scale of one to ten
• Scale of vowels
• Scale out
• SCALEplus
• Scale relativity
• Scale representation
• Scale representations
• Scaler Expectancy
• Scaler potential
• Scaler product