Usually, engagement rings are around 2 carats on average. Carats are used to measure the physical weight of diamonds. This means that the bigger the diamond, the more carats it will have. One thing to consider when purchasing an engagement ring is how much you will be investing. It is never a good idea to spend all your savings on a ring. It is good to really plan ahead and stick to a strict budget. If you don’t have the budget for a 2 carat diamond, there are many options out there that are more affordable.