Average Calculator
Calculate arithmetic, geometric, and harmonic mean of a set of numbers.
Recommended Books on Statistics
Naked Statistics
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The Art of Statistics
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How to Use
Enter Your Numbers
Type numbers separated by commas or spaces (e.g., 10, 20, 30).
View All Averages
See arithmetic, geometric, and harmonic means calculated instantly.
Check Additional Stats
The median, sum, and count are also displayed.
Use Cases
Grade Averages
"Calculate the average score across multiple tests or assignments."
Investment Returns
"Use geometric mean for compound growth rates over multiple periods."
Speed Averages
"Use harmonic mean for averaging rates or speeds over equal distances."
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Frequently Asked Questions
?What is the difference between arithmetic, geometric, and harmonic mean?
Arithmetic mean is the simple average (sum/count). Geometric mean multiplies all values and takes the nth root — good for growth rates. Harmonic mean is the reciprocal of the average of reciprocals — good for rates and ratios.
?When should I use geometric mean?
Use geometric mean for percentage changes, compound interest, or any data that is multiplicative in nature.
?When should I use harmonic mean?
Use harmonic mean when averaging rates, such as speed over equal distances or price-earnings ratios.
?Why is geometric mean N/A?
Geometric mean is only defined for positive numbers. If any value is zero or negative, it shows N/A.
?What is the median?
The median is the middle value when numbers are sorted. For an even count, it's the average of the two middle values.
?Is my data private?
Yes. Everything runs locally in your browser. No data is sent to any server.
?Is this tool free?
Yes. Completely free with no limits, no sign-up required.