What Is an Average Calculator?
An average calculator is a free online tool that finds the arithmetic mean of a set of numbers by adding them all together and dividing by how many there are. But our online average calculator goes far beyond just the mean — it also computes the median, mode, range, minimum, maximum, sum, count, and standard deviation from a single set of inputs.
Whether you need a simple number average calculator for a list of test scores, a grade average calculator for your semester results, or a weighted average calculator for subjects with different credit hours, all five modes are available in one free tool — no signup or download required.
Grade average calculator — find your weighted GPA and letter grade from all subjects instantly
How to Find the Average — Step by Step
The arithmetic mean (average) is calculated using this simple formula:
Average = Sum of all numbers ÷ Count of numbers
📘 Example — Find the average of 5 exam scores
Scores: 82, 91, 75, 88, 94
Sum = 82 + 91 + 75 + 88 + 94 = 430
Count = 5
Average = 430 ÷ 5 = 86
How to Average Grades — Grade Average Calculator
To find your average grade across subjects, there are two methods depending on whether all subjects have equal weight:
Simple Grade Average (All Subjects Equal Weight)
Add all grade percentages and divide by the number of subjects.
📘 Example — My Grade Average Calculator
Math: 88% | English: 75% | Physics: 92% | Biology: 80% | Chemistry: 85%
Sum = 88 + 75 + 92 + 80 + 85 = 420
Count = 5
Average Grade = 420 ÷ 5 = 84% → Letter Grade: B
Weighted Grade Average (Different Credit Hours)
When subjects have different credit hours, use the weighted average formula. This is how GPA is actually calculated:
Weighted Avg = Σ(Grade × Credits) ÷ Σ(Credits)
📘 What Is My Average Grade Calculator — Weighted Example
Math (4 credits): 88% → 88 × 4 = 352
English (3 credits): 75% → 75 × 3 = 225
Physics (3 credits): 92% → 92 × 3 = 276
Total credits = 10 | Total weighted = 853
Weighted Average = 853 ÷ 10 = 85.3% → B
Pro Tip: Use the Grade Average tab and enter credit hours for each subject to get your weighted GPA-style average automatically. Our calculator converts the percentage to a letter grade (A, B, C, D, F) so you know where you stand at a glance.
Mean vs Median vs Mode — What's the Difference?
These three "averages" measure different aspects of a dataset and are all calculated automatically by our calculator:
- Mean (Arithmetic Average) — The sum of all values divided by the count. Most commonly used average. Affected by very high or low outliers.
- Median — The middle value when data is sorted in order. Not affected by outliers. Better for skewed data like income or house prices.
- Mode — The value that appears most often. Useful for finding the most common score, size, or measurement in a dataset.
📘 Example — Mean, Median, Mode from the same dataset
Numbers: 10, 20, 20, 30, 40, 50
Mean = (10+20+20+30+40+50) ÷ 6 = 28.33
Median = (20+30) ÷ 2 = 25 (average of 2 middle values)
Mode = 20 (appears twice, more than any other)
What Is a Weighted Average Calculator?
A weighted average calculator gives different importance to different values based on their assigned weight. It is used for GPA calculations, investment portfolio returns, and any situation where some values count more than others.
For example, if your Physics exam is worth 40% of your final grade and assignments are worth 20%, you cannot simply average them — you need the weighted average. Our weighted mode handles this automatically.
Weighted average calculator — grade point average, exam weightings, investment returns and more
Percentage Average Calculator
To find the average of a set of percentages, simply treat each percentage as a plain number and apply the arithmetic mean formula. For example, if survey responses were 78%, 85%, 92%, 67%, and 88%:
Average = (78 + 85 + 92 + 67 + 88) ÷ 5 = 82%
Our percentage average calculator mode automatically strips the % symbol from inputs and computes the mean, displaying the result with a % sign so it is immediately meaningful.
