School

Calculate grades, GPA, averages, standard deviation and probabilities.

School

Calculate grades, GPA, averages, standard deviation and probabilities.

Grades & study

Grade calculator
Calculate weighted grades and the final-exam score needed for a target.
GPA calculator
Use your grade-point scale and credits for term and cumulative GPA.
NSW ATAR aggregate estimate — 2025
Compare an already scaled aggregate with selected historical UAC thresholds.

Statistics

Average calculator
Find the mean, median, mode and range, or calculate a weighted average.
Standard deviation calculator
Show sample or population variance and squared deviations.
Probability calculator
Work with independent events, combinations and binomial outcomes.

Useful results. Visible working.

Each calculator includes an example and explains its assumptions. Calculations run in your browser, and you choose what to save.