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.
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.
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.