Average Calculator

The arithmetic mean is computed using the formula: mean = (sum of all values) ÷ (count of values). When only two values are active, the calculator sums Value 1 and Value 2 and divides by 2. When the third value is toggled on, Value 3 is added to the sum and the divisor becomes 3. The toggle approach prevents accidentally including an unused zero-value field in the calculation, which would distort the result. For example, if you enter 80 and 90 without toggling on Value 3 (which defaults to 0), you correctly get an average of 85 rather than 56.67. The sum and count are also displayed as separate outputs because they are often needed independently — for instance, when computing a weighted average manually or when verifying that all values were entered correctly. The result is rounded to four decimal places, which is sufficient precision for virtually all practical averaging tasks.