What is an Average Calculator?

The Average Calculator is a free online resource that quickly calculates the arithmetic mean (average) of a set of numbers in just a few seconds. It is a very useful tool for grades, stock prices, budget records, fuel/mileage logs, estimating costs or quantities, and any other activity where you wish to get an instant (and accurate) mean (average) without doing the math yourself. Just type in your values and the result is available immediately: clean, easy to read, and totally reliable!

How Does the Average Calculator Work?

1. Enter the numbers separated by one or more spaces or commas (e.g., 10, 20, 30, 40).
2. (Optional) Include weights if you wish to create a weighted average (e.g., credits, shares, quantities).
3. Click Calculate and discover the mean (and, if applicable, count, sum, and optional rounding).

Quick example: 10, 20, 30, 40 → sum = 100; count = 4; average = 25.

Formulas Used in Average Calculations

• Arithmetic Mean (Average): mean = (x₁ + x₂ + … + xₙ) / n
• Weighted Average: weighted mean = (Σ wᵢ xᵢ) / (Σ wᵢ), where wᵢ are positive weights (credits, quantities, shares).

Key Benefits of Using This Average Calculator Online

• Fast and accurate for long lists - no spreadsheet formulas needed.
• Weighted average modes for grades, inventory, and price averages across purchases.
• Error reducing: consistent math across the list, and rounding control is all optional.
• Any device: mobile, tablet and desktop devices performs well.
• Accessible for multiple contexts such as classrooms, budgeting, analytics and portfolios.

Practical Example Use-Case

• Mileage log: Trips of 12, 15, 13, 14 km → average distance per trip = (12+15+13+14)/4 = 13.5 km.
• Grades (weighted): Scores of 80, 92, 88 with credits of 2, 3, 1 = the weighted mean is, (80·2 + 92·3 + 88·1)/(2+3+1) = 87.3.
• Stock (weighted cost basis): Buy 20 shares at ₹100 and 30 shares at ₹120 → average price = (20·100 + 30·120)/(20+30) = ₹112 per share.