Reading Level Converter

The four reading-level systems, in plain English

US schools use several reading-level scales, and the same book gets a different label on each one. Before you convert anything, it helps to know what each scale measures.

• Lexile measure (the number with an L). A score like 540L, from the company MetaMetrics. It measures text complexity, sentence length and word frequency, on a scale from BR (Beginning Reader, below 0L) up to about 1600L. A child gets a Lexile from a reading test; a book gets one from a text analysis.
• Fountas & Pinnell (guided reading), letters A to Z. A teacher's leveling used to build classroom reading groups, from A (first steps) to Z, plus Z+ for the hardest titles.
• DRA (Developmental Reading Assessment). A one-to-one reading test scored A, then 1 to 80, using mostly even numbers (2, 4, 6 …).
• Accelerated Reader (AR / ATOS). A grade-equivalent decimal like 2.6, meaning “second grade, sixth month.” It is used by the AR quiz program.

The Lexile scale itself is documented by MetaMetrics’ Lexile measures page, which is the clearest place to read how the number is built. Once you know which of the four you are holding, the converter above turns it into the other three.

How to convert between reading levels

None of these systems was designed to convert into the others, so every chart, including this one, is an approximation. Publishers and schools publish correlation charts anyway because parents and teachers need a rough translation. The single most important rule is this: the ranges overlap.

A 4th-grade Lexile band of 740L, 940L and a 5th-grade band of 830L, 1010L share 110 points. A book at 880L is honestly both “4th grade” and “5th grade,” and that is by design. Overlap is what lets a strong 4th grader reach ahead and a 5th grader still find comfortable books. So use a conversion chart to find a starting point, not a verdict, and expect a book to sit in two bands at once.

To read any conversion, find the row that contains your number. If your Lexile is 540L, you land in the 2nd-grade row. If your guided reading level is J, you land in the 1st-grade row. From there the other columns give the equivalent ranges on the remaining scales.

Reading level conversion chart, grades K, 12

This is the correlation the converter above uses. Read across any row to translate one system into the others.

Two numbers to notice. First, the Lexile bands climb steadily: 190L at the top of 1st grade, 740L at the bottom of 4th, and 1050L entering high school. Second, the Fountas & Pinnell letters move slowly at the start (A, D covers all of kindergarten) and speed up later (P, T covers all of 4th grade). That difference is why a parent who only knows the letter can be surprised by the Lexile number, and vice versa.

If you are buying books online, most retailers list the Lexile or the AR level in the product details, and publishers often print the guided reading letter on the back cover of classroom editions. When a listing gives you only one scale, convert it here and check the band before you buy, a book that is one band too hard is frustrating, and one that is two bands too easy stops being a stretch.

Worked example: converting a Lexile of 540L

Say your child's latest reading test reports a Lexile of 540L. Here is the conversion step by step:

• Find the row. 540L sits inside the 2nd-grade band (420L, 650L). It also sits inside the 3rd-grade band (520L, 820L), because the two overlap from 520L to 650L.
• Grade level: late 2nd grade, early 3rd grade.
• Fountas & Pinnell: about J to M, the letters that run across the end of 2nd grade.
• DRA: about 18 to 28.
• Accelerated Reader: about 2.0 to 2.9.

So a 540L reader is comfortable with books such as the shorter Magic Tree House titles and many “Level 3” early readers. Push one step up, to a 620L book, and you are at the top of 2nd grade and solidly into 3rd. The chart shows both rows because both are true: 540L is a bridge number, and the overlap is exactly where a reader is ready to stretch.

Worked example: converting a guided reading level of J

Now go the other way. A teacher tells you your child reads at guided reading level J. Convert it:

• Letters map to grade bands. J is the last letter of the 1st-grade band (D, J) and the first letter of the 2nd-grade band (J, M), so it sits right on the 1st-to-2nd grade line.
• Lexile: roughly 300L to 420L.
• DRA: about 16 to 18.
• Accelerated Reader: about 1.8 to 2.0.

Level J books are typically short early readers with simple sentences and lots of picture support, think the simplest Berenstain Bears titles or leveled readers from Reading A, Z. The next letter, K, moves the reader into 2nd-grade territory and a Lexile around 350L to 450L. Because J appears in two rows of the chart, the converter reports it as the end of 1st grade, which is the safest reading of a single letter that straddles a boundary.

What reading levels can and cannot tell you

A reading level measures how hard the text is, not how ready your child is to enjoy it. Three things a level number never captures:

• Interest and motivation. A child will happily push through a harder book about dinosaurs or soccer and abandon an “easier” one they find boring.
• Background knowledge. A book about a topic your child already knows feels easier than its number suggests.
• Comprehension versus decoding. A child can sound out every word (high decoding) yet miss the meaning, or understand a story read aloud that they could not read alone.

Education researchers treat leveled reading as one tool among many, not a prescription. The US Department of Education’s What Works Clearinghouse reviews the evidence on reading practice, and literacy nonprofits such as Reading Rockets explain how to pair a level with choice. The practical move: use the converter to find a range, then let your child pick any book inside it, and never stop them from reading something harder that they are excited about.