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How to Use Sum Numbers: Complete Guide (2026)
Learn how to use sum numbers free online — no signup, no download. Follow our step-by-step guide below.
What is Sum Numbers?
Calculate the sum of numbers in text. Smart mode automatically extracts all numbers from text (e.g. 'I have 3 apples and 5 oranges' → sum = 8). Delimiter mode splits by a separator (comma, space, etc.). Also supports running sum (cumulative).
- 100% browser-based — no data uploaded to servers
- Free to use — no signup required
- Instant results — no waiting
- Works on all devices — mobile, tablet, desktop
How to Use Sum Numbers: Step-by-Step
- 1
Enter text or numbers
Type or paste text containing numbers, or enter numbers directly.
- 2
Choose extraction mode
Smart mode: extracts all numbers from text. Delimiter mode: splits by separator.
- 3
Compute
Click Compute Sum. The result appears in the output.
- 4
Running sum (optional)
Enable 'Running sum' to see cumulative sum after each number.
Common Use Cases
Quick addition
Add up numbers in a paragraph or list without manual calculation.
Data analysis
Sum values from copied spreadsheet data or CSV exports.
Expense tracking
Sum expenses listed in a text document or notes.
FAQ About Sum Numbers
What does 'smart mode' do?
Smart mode uses regex to find all numbers in the input text, regardless of surrounding words. Example: 'The 3 items cost $50 each, total $150' → numbers found: 3, 50, 150 → sum = 203.
Does this support decimals and negatives?
Yes. Both positive/negative decimals are supported. Example: '-5.5, 10.2' → sum = 4.7.
Ready to Try Sum Numbers?
No signup. No download. 100% free.