Sum Calculator

What is the Sum Calculator?

Add up a long list of numbers pasted from anywhere. Adding a long column of numbers by hand is slow and error-prone, so this tool totals anything you paste in, from any source.

How to use the Sum Calculator

1. Paste or type your numbers into the box (a sample is pre-filled so you can see how it works).
2. Results update automatically as you type; you can also press Calculate.
3. Read the output: sum, count, average.
4. Use the 📊 chart to see the result visually, then copy or share it.

Formula and method

Worked example

With the sample input, the Sum Calculator returns sum: 132; count: 8; average: 16.5.

Where the Sum Calculator helps in real life

You copied 60 expense amounts from a bank statement into a note. Pasting them here gives the total and the count, so you can check nothing was missed.

A volunteer tallies donations recorded on paper forms. Typing each amount on its own line gives a quick, accurate total.

Common mistakes to avoid

• Pasting text such as dates or labels with the numbers.
• Using commas as decimal separators when the tool expects points.
• Missing a line when copying from a PDF.
• Including a subtotal along with the items it sums.

💡 Practical tip: Compare the count of values with your source to make sure every number was included.

Tips for better results

• Check the count matches the number of items you expected.
• Remove currency symbols if the paste includes them.
• Use the average calculator for the mean of the same list.

Related tools