Significant Figures

# of significant figures

100

0.0031

What is 0.0031 to 2 significant figures?

200

253, 400

What is 253400 to 4 significant figures?

300

1010

What is 1010 to 3 significant figures?

400

30.02

What is 30.02 to 4 significant figures?

Rules of significant figures

100

301

Zeros between non-zero numbers are significant.

200

50.00

Trailing zeros, also known as zeros behind a non-zero number AND after the decimal point are significant.

300

152.32

All non-zero digits are significant.

400

0.0025

All zeros to the left of non-zero digits are not significant, even if they are behind the decimal point.