Maybe doesn't belong here but I'll try.

From another RC site I acquired some data relating pack voltage to "State of Charge" for Lipo's, only 7 data pairs. I'd like to find an on-line program (I don't have Excel) that would let me plot this data with useable resolution and accuracy. It might be useful when flying electric and estimating remaining useable flying time. Any ideas where I could find such a program?

Thanks

Frank

You could use something like open office, but there is still a small fee. Might be a free spread sheet somewhere, but If it is only 7 data pairs you can probably graph that by hand.

[link=http://www.ds.unifi.it/~stefanin/AGR_2001/SH/sssheet.htm]Would this work?[/link]

Use the google spreadsheet it is free. Look in Google docs.

Excel compatible too!

Thanks for all the good ideas, guys. Lots of possibles. I'll come back to this task later for a nicer product, but for now I've decided on JohnW's idea of doing it manually. Not very professional, pretty sloppy, but it will satisfy my immediate concerns.

Here's what it looks like.

Frank