SumThing
Calculate sums of cells instantly.
Manifest V2
- By:
- sumthing-bl
- Users:
- 2,000+
- Rating:
- 4.42 (40)
- Version:
- 1.0.3 (Last updated: 2021-11-26)
- Creation date:
- 2020-03-23
- Permissions:
- activeTab
- http://*/*
- https://*/*
- storage
- Size:
- 152.58K
- Email:
- br*****@gocopytech.com
- Full description:
- See detailed description
- Source:
- Chrome Web Store
- Updated:
- 18 hours ago
Ranking
User reviews
Pros
- Simple and fast calculations just by selecting numbers on webpages.
- Saves time and makes calculations easier, very useful tool.
- Helps with specific use cases like banking transactions and Shopify statistics.
- Widely used and appreciated by users, some using it office-wide.
- Accurate and reliable for basic math sums on web pages.
Cons
- Lacks features for calculating time values (e.g., adding hours and minutes).
- No option for copying summed values directly to clipboard.
- Interface/button sometimes blocks content and cannot be moved or resized, causing usability issues.
- Does not handle different number formats well, especially European style with commas and dots.
- Doesn't work well with tables or multi-column data selection; sometimes selects unwanted cells.
Recent reviews
This is awesome, would be even better if there was a text box to do quick calculations from previously summed values.
by 
Shawn Hoo, 2025-04-14
Shawn Hoo, 2025-04-14very usefull
by 
M&cS Devloper, 2025-04-12
M&cS Devloper, 2025-04-12This extension is amazing! I've been looking for a utility like this for years. In order to receive interest on my checking account, my bank requires me to use the bank's debit card 15 times a month with a minimum purchase of $15 each or, have a total of $500 worth of transactions. I seldom can make the 15 transactions but I can however most of the time meet the $500. With this extension all I have to do is hold down the control key while I go through my online bank checking account overview and see a running total of my debit card amounts! Fantastic!! Thank you so much for this timesaving utility!!
by 
Rick Erdmann, 2025-02-17
Rick Erdmann, 2025-02-17Extension safety
Risk impact
SumThing requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
Risk likelihood
SumThing has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension support email may not be valid.
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