I'm writing an article about tips and tricks for Sig Fig. I found some on google but I need more.

I want to write also about an online calculator. Please suggest.

IrvingPerez Apr 25, 2020

#1**+1 **

**Hello,**

I was a math teacher. My first priority was always to teach students tricks about math.

Yes, some online calculators are reliable like sig fig calculator on calculators.tech. Actually, the reason I like this calculator also describes which rules are applied to calculate significant figures of your entered number.

aneeq1122 Apr 25, 2020

#2**+1 **

I would treat that calculator with caution.

You need to understand significant figures.

Say I said. This piece of timber is 2.5 metres long and I want that expressed to 4 significant figures.

I put it in your Sig fig calc and I get 2.500 m

This is incorrect. 2.5 has 2 significant figures, it cannot be written to 4 significant figures. The question is nonsense.

A nonsense answer is given to a nonsense question.

Melody Apr 25, 2020