Lexile Conversion Chart

 

Lexile
Rating

Educational
Grade-Level

25

1.1

50

1.1

75

1.2

100

1.2

125

1.3

150

1.3

175

1.4

200

1.5

225

1.6

250

1.6

275

1.7

300

1.8

325

1.9

350

2.0

375

2.1

400

2.2

425

2.3

450

2.5

475

2.6

500

2.7

525

2.9

550

3.0

575

3.2

600

3.3

625

3.5

650

3.7

Lexile
Rating

Educational
Grade-Level

675

3.9

700

4.1

725

4.3

750

4.5

775

4.7

800

5.0

825

5.2

850

5.5

875

5.8

900

6.0

925

6.4

950

6.7

975

7.0

1000

7.4

1025

7.8

1050

8.2

1075

8.6

1100

9.0

1125

9.5

1150

10.0

1175

10.5

1200

11.0

1225

11.6

1250

12.2

1275

12.8

1300

13.5

This conversion chart is based on educational levels from the published “Lexile Framework” chart. A smoothed curve was fit through the grade-level points indicated here, and regression analysis provided the equations:


Lexile=500Ln(Grade Level) or, the counterpart Grade Level=e0.002(Lexile)


The resulting regression equation was then used to calculate the educational grade-levels in the above table. A separate study of over 700 titles confirmed that their Accelerated Reader© (Advantage Learning’s reading management software) reading levels and Lexile ratings are correlated, and that regression analysis on published Accelerated Reader and Lexile reading levels produces a very similar conversion equation.


* “Lexile” and “Lexile Framework” are trademarks of Metametrics, Inc.

©Advantage Learning Systems, Inc.