Significant Figures Table: Rounded to significant figures by Number
Reference table of rounded to significant figures for Significant Figures across a range of number values — exact, engine-computed figures you can read off at a glance.
Significant Figures Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Rounded to significant figures
12,300.000000
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Significant Figures Calculator
The Significant Figures Calculator works out your rounded to significant figures in an instant. Enter number and significant figures to keep and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the number.
- Enter the significant figures to keep.
- Read off your rounded to significant figures — the calculator updates automatically, with no button to press.
Worked example
For example, with number of 12,345 and significant figures to keep of 3, the rounded to significant figures is 12,300.000000.
| Number | 12,345 |
|---|---|
| Significant figures to keep | 3 |
| Rounded to significant figures | 12,300.000000 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
They are the meaningful digits in a number that carry precision. 12345 to 3 significant figures is 12300.
Keep the chosen count of leading meaningful digits and round the rest, adjusting the place value with zeros.
No. Leading zeros only set the decimal place. In 0.00456 the significant figures are 4, 5 and 6.
They communicate how precise a measurement is, which matters in science and engineering.
Enter the number. Enter the significant figures to keep. Read off your rounded to significant figures — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Significant Figures: Formula, Steps & Examples
Learn how to calculate Significant Figures — the formula explained step by step, with worked examples and a free calculator to check your answer.