Adding a list
The numbers are added in the order you typed them, and the total is exact to the decimals you entered.
Separate the numbers with commas, spaces, semicolons or new lines. A pasted spreadsheet column works as it is.
Worked example
The list 12, 7.5, 30 has three numbers. Their sum is 49.5 and their mean is 49.5 / 3 = 16.5.
The largest is 30 and the smallest is 7.5.
Checking a total
The count tells you how many numbers were read, which catches a missed entry or a stray blank cell.
If the total looks wrong, check the count first. A number stuck to the previous one, such as 7.530 instead of 7.5 and 30, changes both.
Inputs for the sum calculator
Numbers to add
Separate the numbers with commas, spaces or new lines. Text that is not a number is named in the error message.
CALCULATOR QUESTIONS
Sum calculator questions
How many numbers can I add at once?
As many as fit in the box, which holds 2000 characters. That is several hundred numbers.
Can I paste a column from a spreadsheet?
Yes. Paste the column and the line breaks are read as separators.
What does the mean show?
The sum divided by how many numbers there are. For 12, 7.5 and 30 the mean is 16.5.
Can I add negative numbers?
Yes. A minus sign before a number subtracts it, and the total can be negative.