Table 1.

Interpretation of readability scores

Difficulty	Flesch reading ease score	Flesch-kincade grade level	Gunning fog index
Very easy	91-100	4	4.9 or lower
Easy	81-90	5	5-5.9
Fairly easy	71-80	6	6-6.9
Standard	61-70	7-8	7-7.9
Fairly difficult	51-60	9-10	8-8.9
Difficult	31-50	11-14	9-9.9
Very difficult	0-30	15-16	10 or higher