This fast, mobile-friendly sum calculator lets you add any number of values in one place. Start with 12 fields, click “Add field” (or press Enter on the last input) to expand the list, and see the total update as you type. Use “Clear Field” to wipe a single line, “Clear All” to reset, and “Copy Total” to grab the result.

Calculator of the Sum of Several Numbers

Enter your numbers below. The total updates automatically. Add rows as needed or clear values quickly.

Total Sum
Tip: Press Enter on the last field to add a new one.
Share this?
WhatsApp X Telegram Facebook LinkedIn Reddit

How to Use

  1. Type numbers into the fields. Negative numbers and decimals are supported.
  2. The Total Sum updates automatically with every change.
  3. Need more rows? Click Add field or Add 10 (or press Enter on the last line).
  4. Use Clear Field to empty one line without touching the rest.
  5. Click Clear All to reset everything, or Copy Total to copy the result.

Key Features

  • Unlimited list size: add as many fields as you need.
  • Automatic running total: updates on every keystroke.
  • Precision handling: smart rounding prevents floating-point artifacts (e.g., avoids showing 0.3000000000004).
  • Fast editing: Clear Field for one line, Clear All for the entire list, Copy Total for quick sharing.
  • Keyboard friendly: Enter on the last line adds a new field.
  • Works on any device: classic layout, large touch targets, high contrast.

What You Can Do With This Tool

  • Accounting & receipts: sum itemized costs, tax lines, reimbursements.
  • Classroom & grading: add points across assignments or quizzes.
  • Research & lab notes: total repeated measurements or trial results.
  • Shopping lists: keep a running total while planning a budget.
  • Fitness & nutrition: add calories, macros, or weekly distances.
  • Home projects: sum materials, lengths, or costs from multiple sources.
Online Sum Calculator — Add Multiple Numbers Instantly

We hope you need to calculate the amount of your money in a similar heap.

Tips for Accurate Results

  • Decimals: use a dot (.) as the decimal separator (e.g., 12.75).
  • Negatives: prefix with a minus (e.g., -4.5) to subtract values in the list.
  • Blank lines: empty fields are ignored in the total.
  • Formatting: avoid commas in inputs (type 1000, not 1,000).

FAQ

How many numbers can I add?

As many as you need. The list starts at 12 fields and grows dynamically.

Does this support decimals and negative numbers?

Yes. Enter decimals like 3.14 and negatives like -2.5.

How do I copy the result?

Click Copy Total under the result to place the sum on your clipboard.

Will the tool round my numbers?

Inputs are summed exactly; the displayed total uses light rounding to avoid floating-point glitches (e.g., 0.1 + 0.2 shows as 0.3).

Do you store my data?

No. Calculations run in your browser only; nothing is uploaded.

Why Use This Sum Calculator?

It’s quicker than spreadsheets for one-off totals, easier than a handheld calculator for long lists, and built for clarity: large inputs, clear labels, and instant feedback.

What is your use case for this online tool? Would you like it to have any more features? Let us know in the comments below.

CalcuLife.com