Numbers Sum
Quickly calculate the sum of any numbers, supporting multiple separators like line breaks and commas, automatically filtering invalid content
Numbers Sum Documentation
What is Numbers Sum?
Numbers sum is the process of adding multiple numbers to get a total. This tool is designed for daily high-frequency statistics, suitable for financial reconciliation, student grade summary, purchase quantity verification, quotation total, and questionnaire data screening scenarios, saving the tedious steps of manually entering calculators or Excel tables, and improving data processing efficiency.
Core Features
How to Use
- Enter or paste the list of numbers to calculate in the input box
- Support line break separation, English comma (,), or Chinese comma (，) separation
- System automatically identifies and calculates sum in real-time
- Click the "View Example" button to view example data and automatically calculate
- After calculation, click the "Copy Result" button to copy the calculation result
- Click the "Clear All" button to clear all input and output
Common Use Cases
Frequently Asked Questions
What input formats are supported? How are empty lines, spaces, or invalid characters handled?
Support three main data separation formats: line break separation, English comma (,), and Chinese comma (，); can automatically skip empty lines, leading/trailing redundant spaces, pure space segments, and non-numeric invalid content (such as "abc", "Amount: 100"). Only accurately extract legal values (including positive/negative numbers, decimals), and silently filter other irrelevant content, without errors or interruption of the calculation process, ensuring the stability and continuity of the operation.
When should I use "Calculate" vs "View Example"?
"Calculate" is used when you already have data to process, just paste and calculate; "View Example" is recommended when you are not sure if the format is correct, or when using it for the first time - it will automatically fill in 6 typical values including integers, decimals, and negative numbers and complete the calculation, helping you verify within 5 seconds whether the tool is usable, whether the format matches, and whether the result is trustworthy.
Will the calculation result retain decimal places? What is the precision?
The result completely retains the decimal precision of the original values (e.g., input `1.1`, `2.22`, `3.333`, output `6.653`), no rounding, no truncation, no scientific notation. The underlying layer uses JavaScript Number type double-precision floating-point arithmetic, meeting daily financial and statistical needs (error less than ±1e-15), no additional configuration required.
After clicking "Copy Result", will it include units or line breaks when pasted into Excel or WeChat?
No. The copied content is a pure numeric string (e.g., `252.5`), without any units, brackets, spaces, line breaks, or prompt text. It can be directly pasted into Excel cells, WeChat chat, Word tables, email body, and any other environment. Excel will automatically recognize it as a numeric type, supporting subsequent formula operations.
Is my data secure? Will it be uploaded or saved?
Absolutely secure. This tool is 100% frontend local operation: all parsing, validation, and accumulation are completed in your browser memory, without initiating any network requests, without calling external APIs, without uploading, caching, or recording any input or results. After closing the page, all data is immediately released with zero residue.