Work out likert scale mean instantly with clear inputs, formula shown and shareable results.
A Likert mean is the response-weighted average of the scale points. With 8, 15, 40 and 25 responses at 1, 2, 4 and 5 the mean is 3.90 out of 5, and 74.7% fall in the top two boxes. The mean assumes equal spacing between points, which is why many researchers report the top-two-box percentage alongside it.
Weighted mean
mean = sum(scale point x count) / total responses
Top two box
percent = (count at 4 + count at 5) / total x 100
Strictly it assumes equal intervals, which is debatable. In practice Likert means are widely used, but reporting the distribution alongside them is better practice.
It reports agreement without the interval assumption, and is less sensitive to a handful of extreme negative responses dragging the mean.