Paste your list
Use one number per line or separate values with commas, spaces, or semicolons.
THE SIMPLE WAY TO ADD IT UP
Sum Calculator
Paste a list of numbers. See the total and the details instantly.
Free to useNo sign upRuns in your browser
01 / INPUT
Your numbers
Enter numbers separated by commas, spaces, semicolons, or new lines.
Decimals and negative numbers are welcome.
Have labels or currency symbols? AI can suggest a number list. Your text goes to Cloudflare only if you click.
Check these numbers before calculating
02 / RESULT
Your total
SUM
Count
Average
Minimum
Maximum
The sum is calculated on this device.
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THE QUICK GUIDE
Add numbers without the extra steps.
Use this sum calculator for expenses, scores, measurements, or any list that needs a reliable total. Paste a column from a spreadsheet or type values directly.
Check the sum
The total updates as you type. The count helps you confirm that every value was included.
See the context
Average, minimum, and maximum help you understand the list at a glance.
A QUICK EXAMPLE
What is the sum of 12.5, 8.75, −3, and 24.25?
Add the four values and the sum is 42.5. Their average is 10.625. Select “Try an example” above to see it in the calculator.
12.5 + 8.75 − 3 + 24.25= 42.5
GOOD TO KNOW
Frequently asked questions
What separators can I use?
Commas, Chinese commas, semicolons, spaces, tabs, and line breaks all work. Because commas separate values, enter 1234 rather than 1,234 for one thousand two hundred thirty-four.
Can I add negative numbers and decimals?
Yes. Values such as −3, 0.5, and .75 are supported. Remove currency signs or other text from the list before calculating, or use AI to extract numbers from text.
How is the average calculated?
The average is the sum divided by the count of valid numbers. Every entered number has equal weight. Repeating decimals are rounded to 10 decimal places; the sum itself is exact.
Are my numbers saved or uploaded?
Regular calculation stays in your browser. If you click “Extract numbers with AI,” the text you entered is sent to Cloudflare Workers AI for parsing. Check the extracted numbers before using them.