How many significant figures in 0.0025?
0.0025 has 2 significant figures.
Significant figures
Tap a digit to see why it counts.
Round to
0.0025→0.0025
Nothing is dropped.
Add, subtract, multiply, divide
- 4.2374 significant figures
- 2.513 significant figures
Exact result1.68804780876
Multiply or divide: keep the fewest significant figures.
Digit by digit
- 000
Leading zero: does not countLeading zeros only fix the decimal point, so they are not significant.
- 25
Non-zero digit: countsEvery non-zero digit is significant.
2.5 × 10⁻³
- Rounded to 1 significant figure0.002
Nearby numbers
Rounding a value? See 2.745 to 3 significant figures.
0.0025: quick answers
How many significant figures does 0.0025 have?
0.0025 has 2 significant figures. In 0.0025, the zeros at the start only fix the decimal point.
Why do the zeros at the start of 0.0025 not count?
Zeros before the first non-zero digit only fix where the decimal point sits. 0.0025 in scientific notation is 2.5 × 10⁻³, and no zero is left in the mantissa.
What is 0.0025 rounded to 1 significant figure?
0.0025 rounded to 1 significant figure is 0.002. The dropped digit is exactly 5 and the digit before it, 2, is even, so it stays.