Literacy Arcade — ORF Fluency Calculator

About

Calculate oral reading fluency in seconds.

The Literacy Arcade ORF Fluency Calculator gives teachers, tutors, and reading interventionists a fast, classroom-ready way to measure oral reading fluency. Click the toolbar button and the tool opens in a new tab — no setup, and no login required to use it.

What you can do:
- Calculate words correct per minute (WCPM) and reading accuracy
- Use the built-in timer for live reads, or enter the time manually
- Compare scores to Hasbrouck & Tindal Oral Reading Fluency Norms by grade and season
- See an at-a-glance benchmark range (below / developing / strong)
- Print a clean student report 

Built on the science of reading by a reading researcher with a Ph.D. in Reading Education, to support real classroom, intervention, and tutoring use.

This extension is a quick launcher: it opens the calculator at literacyarcade.com, so you always get the newest version. It requests no permissions and collects no data.

Learn more at https://literacyarcade.com