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Sum Calculator: Total Precision, Zero Hassle!

Sum Calculator

New Support Thousand Separators now.

Add numbers separated by a comma (plus a space) [example1],a space [example2] or a line break [example3]:
If your text has non-numeric content, use our Number Extractor for cleaner calculations.

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About Sum Calculator

sum calculator

Welcome to our premier Sum Calculator! This high-precision online number adder is your ideal companion for quick and accurate additions. Whether you're tallying up a list, mixing positive and negative numbers, or simply seeking a smooth addition journey, we're here to assist.


  • High Precision: Calculate the sum with up to 1000 decimal precision.
  • User-Friendly: No need to use the plus (+) sign between the numbers.
  • Supports Large Numbers: Easily add numbers with thousand separators.
  • Mobile Version Available: Install it as a PWA on your home screen and add up numbers on the go.


To add numbers together, separate each one using a comma followed by a space, a space alone, or a line break, and the tool will automatically calculate the sum, presenting you with the total sum.

The adding calculator has been tested rigorously, proving its capability to instantly add a list of numbers reaching up to 10k in quantity, showcasing its efficiency and reliability.

Absolutely. The tool maintains full functionality when you add numbers that are negative; just ensure to retain the negative sign with the numbers.
Yes, it supports the use of thousand separators, facilitating the addition of large numbers with ease.

Yes, while primarily designed as a summation calculator, it can also function as a series sum calculator, helping you find the sum of a series of numbers with ease. If you are looking to calculate the sum of a specific series, you might find our Geometric Sequence Calculator or Arithmetic Sequence Calculator more suitable.

Yes, the sum tool is developed as a PWA (Progressive Web App), allowing you to install it on your home screen, provided your device and browser support PWA, offering a convenient way to add a list of numbers on the go.


Summation from Wikipedia

Addition from Wikipedia

Reference this content, page, or tool as:

"Sum Calculator" at https://miniwebtool.com/sum-calculator/ from miniwebtool, https://miniwebtool.com/

by miniwebtool team. Updated: Sep 26,2023

You can also try our new AI Math Solver to solve your math problems through natural language question and answer.

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