ConverterHub

Sum Calculator

Find the total of any list of numbers.

How it is calculated

The tool reads a list of numbers separated by commas, semicolons, spaces or line breaks, ignores anything that is not a valid number, adds the valid ones and counts them: sum = x₁ + x₂ + … + xₙ. Decimals use a dot as the decimal separator (12.5, not 12,5), and negative numbers are allowed. Because a comma separates items, a figure written with a decimal comma or thousands comma is split into two numbers. Empty input or a list with no valid number gives no result. The sum is shown with two decimals and the count as a whole number; the average is the sum divided by the count.

Worked example

List: 12.5, 7.25, 30, 4.75. Four valid numbers are found, so the count is 4. Running total: 12.5 + 7.25 = 19.75; 19.75 + 30 = 49.75; 49.75 + 4.75 = 54.5. The tool shows the total as 54.50. Dividing by the count would give an average of 13.625.

Try this example →

Common mistakes

  • Typing a decimal comma (3,5) and getting 3 and 5 as two separate numbers.
  • Writing thousands with a comma (1,200), which is read as 1 and 200.
  • Including currency symbols or units like "$5" or "3kg". Items that are not pure numbers are silently skipped, so check that the count matches your list.
  • Expecting an error for a typo. A mistyped item is dropped, and the sum is built from fewer numbers.

About this calculator

This tool adds every number in a list and returns the running total, along with a count of how many values were entered and their average. It accepts numbers separated by commas, spaces or new lines, so you can paste a column straight out of a spreadsheet or receipt without reformatting it first.

Bookkeepers reconciling a stack of invoices, students checking a homework total, and anyone splitting a bill or tallying a shopping list use it to skip manual addition and the risk of a dropped digit. Negative numbers and decimals are handled the same way as whole numbers, so it works equally well for a list of expenses or a set of temperature readings.

Was this helpful?

You can pick up to 3 reactions.

Comments (0)

  • Be the first to comment.

Popular calculators

Loan Calculator

Monthly payment, total interest and full amortization schedule.

Percentage Calculator

Percent change, percent of, and ratio calculations.

Discount Calculator

Calculate final price, savings, and discount amount.

BMI Calculator

Body mass index from height and weight (metric or imperial).

Age Calculator

Compute your exact age in years, months and days from a birth date.

Compound Interest Calculator

Calculate the final amount and interest earned with compounding.

All Calculators