A stock price estimation method, apparatus, and device. The method comprises: obtaining current tick data of a stock, wherein the current tick data comprises N best prices and corresponding buy/sell volumes of the stock, where N is a positive integer greater than 1; determining, by using money to be invested or money to be withdrawn and the current tick data, a final transaction price if all the money to be invested is used to buy the stock or all the money to be withdrawn is obtained by selling the stock; and presenting the final transaction price in real time for an investor's reference. By means of the stock price estimation method provided in the embodiments of the present invention, the fluctuation of a final price of a stock under the impact of a particular amount of money can be calculated by using current tick information.