# Average Calculator - Mean, Weighted, Geometric and Harmonic

> Free online average calculator: arithmetic mean, median, mode, geometric and harmonic mean and RMS in one pass, plus weighted averages for grades and GPAs.

- URL: https://qilingtools.com/en/math/average
- Category: Math Tools (https://qilingtools.com/en/math)
- Tags: [Math](https://qilingtools.com/en/tags/math), [Statistics](https://qilingtools.com/en/tags/statistics)
- Last updated: 2026-10-26
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

Paste a set of numbers for the arithmetic mean, median, mode, geometric and harmonic means and root mean square. Switch to weighted mode and write “value weight” on each line to compute a weighted average, with every product and its share listed — ideal for coursework and exam weightings.

## How to use

1. Choose simple or weighted average
2. Paste the data; in weighted mode write “value weight” per line, e.g. 90 3
3. Read the averages, with a breakdown below in weighted mode

## Features

- Arithmetic, geometric, harmonic and quadratic means together
- Median, mode, range, minimum and maximum included
- Weighted mode lists value × weight and each weight’s share
- Any separator: spaces, commas or line breaks
- One-click copy for every value

## FAQ

### How do I calculate a weighted average?

Weighted mean = Σ(value×weight) ÷ Σweight. With coursework 90 at 30% and an exam 85 at 70%: (90×3 + 85×7) ÷ 10 = 86.5.

### When should I use the geometric mean?

For growth rates and investment returns — it is the nth root of the product of the values, and it requires all values to be positive.

### When is the harmonic mean right?

For average speeds or unit prices, where the quantities share a numerator but differ in the denominator: n ÷ Σ(1/xᵢ).

### Can I leave a weight out?

Yes — a line with only a value is treated as having weight 1.

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