How I can check if my chest from kingdom is full?

All the people that you give materials to will tell you if you try to gather, and you won't be able to gather any more.

I have no idea what you mean by 'chest' but to cover the options:

 

Coffers: 7.5m is max, you can see it on the management screen

Approval: Workers say you've done enough once it hits 100%

Rewards: Earned every 24 hours, and it never really gets 'full' People have tested leaving it for hundreds and hundreds of days and it's not hit any caps.

Sy_Accursed, you're wrong. The reward storerooms do become full. One instance when this happens is when you reach either 999 or 1000 bird's nests (can't remember which it was, but i've done it multiple times). I don't know about other caps.

 

Anyway, even due to limitations of Java (and other languages), all values are capped somewhere. Hence, it's kind of silly to say that a cap doesn't exist. In this case it's even reachable in under a year.

Well yes it obviously has some technical cap but as I said people have left it for hundreds and hundreds of days without hitting any sort of 'full' status, aside from the secondary items being limited to 999, the primary items have not been found to hit a cap yet. And given that the average player is not likely to leave mtk for hundreds upon hundreds of days (unless they quit in which case the coffers and approval would bottom out before a cap was hit) to all intents and purposes it's not going to get 'full.'

 

I was trying to give a concise and practical answer without going off on tangents about tech limitations and what not too much based upon the fact such details don't really add anything to the answer given their extremity (and lack of a quantifiable proven answer) and based on the poster having a rather vague question using terms that do not actually occur in game it seemed like a safer bet to keep things clear and simple and not complicate matters.

Bird nests are capped at 999, The other items have the same cap as any item in runescape. 2,147,483,647

http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/Integer.html

^ More info on integers if you want to get more technical with it

Well yes it obviously has some technical cap but as I said people have left it for hundreds and hundreds of days without hitting any sort of 'full' status, aside from the secondary items being limited to 999, the primary items have not been found to hit a cap yet. And given that the average player is not likely to leave mtk for hundreds upon hundreds of days (unless they quit in which case the coffers and approval would bottom out before a cap was hit) to all intents and purposes it's not going to get 'full.'

 

I was trying to give a concise and practical answer without going off on tangents about tech limitations and what not too much based upon the fact such details don't really add anything to the answer given their extremity (and lack of a quantifiable proven answer) and based on the poster having a rather vague question using terms that do not actually occur in game it seemed like a safer bet to keep things clear and simple and not complicate matters.

I have played RS for quite a while and quit about 4 years ago with 7.5M in my coffers and 100%. I recently came back after 4 years and my loyalty was at 49% and still had about 3M gp. I had over 40k coal several hundred gems and 13K mahogany logs. Sometime during that time it stopped adding stuff becasue my loyalty and money had not run out.

I have played RS for quite a while and quit about 4 years ago with 7.5M in my coffers and 100%. I recently came back after 4 years and my loyalty was at 49% and still had about 3M gp. I had over 40k coal several hundred gems and 13K mahogany logs. Sometime during that time it stopped adding stuff becasue my loyalty and money had not run out.

 

Uh.... :/