Question 1

How do I round to significant figures?

Accepted Answer

Keep only the specified number of meaningful digits. 12,345 to 3 sig figs = 12,300. 0.04567 to 2 sig figs = 0.046.

Question 2

Why are significant figures important?

Accepted Answer

They indicate measurement precision. Reporting more digits than your measurement allows implies false accuracy.

Question 3

How accurate are these calculations?

Accepted Answer

Our calculator uses double-precision floating-point arithmetic, accurate to about 15-16 significant digits for most calculations.

Question 4

Can I use the result in further calculations?

Accepted Answer

Yes, results are calculated to full precision. You can copy the exact value or use the rounded display depending on your needs.

Significant Figures Converter

Frequently Asked Questions