Significant Figures Calculator

Enter a number to find its significant figures

Enter a number above to see the detailed explanation...

1 All non-zero digits are significant

2 Zeros between non-zero digits are significant

3 Leading zeros are NOT significant

4 Trailing zeros after decimal ARE significant

5 Trailing zeros without decimal may or may not be significant

123.45 → 5 sig figs

0.00450 → 3 sig figs

1000.0 → 5 sig figs

1000 → 1-4 sig figs