There are no formulas sheets allowed into the CFA® exam. You need to be able to remember over 250 formulas off by heart, be able to recall them accurately and know when and how to use them.
A great way to learn your formulas is to copy them out. Once you think you know them, you can write them out without checking your formula sheet and see how many you get right. Our formula test can help you do just that. Use it too help you memorize the formulas as well as test your recollection.
If you have not downloaded the free CFA® 1 formula sheet you can do so here.