F scale

F scale may refer to:

• F-scale (personality test), a personality test that attempts to quantify authoritarian tendencies
• Fujita scale, a system of rating of a tornado's intensity by its impact on structures and vegetation
• F scale (modelling), a 1:20.3 scaled gauge track used with model trains
• F Scale, a validity scale of the Minnesota Multiphasic Personality Inventory
• the F major scale.