How do you transpose music from bass clef to treble?

I am the only bass clarinet in my marching band, and the music we bought for the show didn't come with a bass clarinet part, so I have to transpose the low brass music (which is in bass clef) into treble so I can read it. I want to know how to do it, because all of the websites I went to were very confusing, so if you could give me a straight answer, that would be great. And I need an answer ASAP.