How do I check how much bandwidth I used this month?

[nosebleedXD]

recently i've been running a cs server and i guess it took up alot of bandwidth..

just a week ago when i opened up my webbrowswer this little rogers thing pop out on the top of the webbrowser saying i've reached 75% of my bandwidth

now i just wanna know if i went over yet or exactly how much more cause its been a week and i need to know if i'm at 90% yet or w.e so i don't get charged

and also, i'm a youtuber and i was wondering if it takes up alot of bandwidth?

 

[nosebleedXD]

so could you check or i'd have to call my isp O_O

 

[Ultiweap]

When you have already used you a part of your bandwidth no program will be able to ask you how much you used if you haven't use it as from start but the only way is to call you ISP and ask them. They may have a website specially for checking the bandwidth used.