The Lensear Write readability formula is suited to creative writing and internal comms. Find out how it's calculated and how you can use it.
Lix and Rix are readability formulas which evaluate non-English languages. Find out how this international solution works and how you can best use it.
The Fry formula is one of several developed in the 1960s for speed and efficiency. Find out how this graph can help you improve your readability.
IELTS is a standardised proficiency test. It can be used to reach a global audience. Find out how IELTS is calculated and how you can best use it.
The Powers Sumner Kearl formula was developed in the 1950s by a group of readability experts. Find out how you can use it to improve your writing.
The Raygor readability graph is a formula which calculates the reading grade level of a text. Find out how it's calculated and how it can best be used.
Other readability formulas work great when you’re writing a narrative. What about when you’re not, and how can the FORCAST formula help you analyze incomplete sentences?
Readability has evolved with language. It is also linked to consumer habits, tech and education. Find out more about the history of readability.
The Spache formula is a readability measure which estimates an elementary reading grade level. Find out how it's calculated and how you can best use it.
The New Dale-Chall formula was created to analyse readability for fourth-graders and above. Find out where it came from and how you can best use it.
The ARI assesses the U.S. grade level required to read a piece of text. It is useful for technical writing. Find out how you can use it.