The link you gave is the official CDN government calculator for this purpose. However, that calculator doesn't tell you if you're eligible for any program or not - they have another tool for that, but that tool doesn't give you your ranking score. This leads to many people thinking they are eligible when they're not and can be very discouraging.

It's a little convoluted because the Express Entry system was introduced in 2015 on top of the three existing skilled worker programs and the CDN government just hasn't caught the tech up to where it should be.

I made this tool as the best available for merging these program calculators, and also making it so that I can optionally assess people for provincial programs, work permits etc.

Thanks!