Statistics Calculators
6 free statistics calculators — all with step-by-step working shown
Mean, median, mode, standard deviation and probability — all with working.
Mean, Median, Mode Calculator
Calculate all averages and range with step-by-step working
Standard Deviation Calculator
Calculate standard deviation with full working shown
Range Calculator
Find the range of a dataset instantly
Frequency Table Calculator
Find mean, median and mode from a frequency table
Probability Calculator
Calculate probability as a fraction, decimal and percentage
Cumulative Frequency Calculator
Build cumulative frequency tables and find quartiles
Why step-by-step working matters
Statistics calculators covering the full GCSE and A-Level curriculum. Calculate mean, median, mode and range from any dataset. Find standard deviation, work out probability, and analyse frequency tables — all with step-by-step working that shows you the method used in exams.
Unlike calculators that show only the final answer, every Pythagorist tool displays the complete method — the same working you would write in an exam. This means you can understand the process, not just copy a number. Students who understand the method score more marks, because examiners award points for correct working even when the final answer contains an arithmetic error.