Sum Calculator
The sum is the total obtained by adding all numbers together. This calculator computes the sum of any list of numbers and also provides additional statistics: count (how many numbers), minimum (smallest value), maximum (largest value), and mean (average). Enter numbers separated by commas or one per line. The calculator works with positive, negative, and decimal numbers. It is useful for quick arithmetic, financial totals, grade calculations, and any situation where you need to combine multiple values into a single total.
Sum formula
Sum = a + b + c + ... + z
Count = number of values
Mean = Sum / Count
Min = smallest value
Max = largest value
Example calculation
| Values | Sum | Count | Mean | Min | Max |
|---|---|---|---|---|---|
| 5, 10, 15, 20, 25 | 75 | 5 | 15 | 5 | 25 |
| 100, 200, 300 | 600 | 3 | 200 | 100 | 300 |
| 2, -5, 8, -1 | 4 | 4 | 1 | -5 | 8 |
Sum calculator: frequently asked questions
What is a sum?
A sum is the total you get when you add all numbers together. For example, the sum of 2, 4, and 6 is 2 + 4 + 6 = 12.
What is the difference between sum and average?
The sum is the total of all values added together. The average (mean) is the sum divided by how many values there are. For the numbers 2, 4, 6: sum is 12, average is 12 / 3 = 4.
What is the minimum and maximum?
The minimum is the smallest value in the dataset. The maximum is the largest value. For 2, 4, 6: minimum is 2, maximum is 6.
How do I input numbers?
You can enter numbers separated by commas (e.g., 1, 2, 3) or one number per line. The calculator will automatically parse them and compute the sum, count, min, max, and mean.
Can I sum negative numbers?
Yes, the sum calculator works with negative numbers. For example, the sum of 5, -3, and 8 is 10. Negative numbers are added just like positive numbers.
Official sources
- Basic arithmetic and statistics: NIST Special Publication 330.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.