I'm thinking that Furious 7's final world wide box office total will be just a bit north of $1.525 billion. Its pretty much almost at the end of its theatrical run in most overseas countries and in North America it almost done also, although it should get a minimal boost from its discount theater run.

I haven't even heard of that number, but have heard people claiming a different one, I don't know where you get this "well Known" from. In reality, there is no one number, it will vary wildly depending on marketing costs, the countries the money came from, Digital/Blu Ray/DVD, merchendise etc. 

I heard it multiple times on multiple movie podcasts. And of course it varies - don't make me repeat this but 2.5x is an indication.

I hope they re-released Furious 7 in theaters so it will have a better chance to outsell the first Avengers film.

I heard 1.81x its budget is the best estimate. 

I know you're posting in jest but just google it - 2.5 times is what is needed on average.

Well with that final total it will be ahead of the first Avengers by a few million dollars since that one made $1,518.6 billion world wide.

What?  No, I used to be a part of a group of industry insiders. I heard dozens of people saying the average was 1.81.  For movies like Avengers, 2.5 is a good bet, indies only need to make like 1.5, but the average was 1.81. I just assume that's what all need, since it's easier than factoring in a 300 million dollar marketing budget.  

I don't think any movie has come close to having a 300 million dollar marketing budget as a matter of fact a lot of big budget movies get free marketing and advertising by having cross promotion deals with products that are featured in that movie. 

The Amazing Spider-Man 2 had a marketing budget of $180M-$190M. Not sure where you got the idea that big budget movies don't have to pay for marketing.