is a 21 a good ACT score?

A 21 sits near the national average composite (around 19-20). It meets admission requirements at many regional universities, and it's a workable starting point rather than a finished result.

Students starting from this range typically have the most points available from prep, because the gap is usually concentrated in a handful of fixable areas: pacing, a few grammar rules, and core algebra. A structured 6-10 week plan moving a 21 to a 25-27 changes both your admission options and your scholarship math significantly.

Percentiles are approximate, rounded from ACT's published national norms, which shift slightly each year. Since 2025 the ACT composite is the average of English, Math and Reading. Science is an optional section reported separately.