This paper describes the four methods for estimating the Weibull distribution parameters: the least square method (LSM), the weighted least square method (WLSM), the maximum likelihood method (MLM) and the method of moments (MOM). The performance of these methods is compared using the Monte Carlo simulation. The efficiency of the methods is compared based on the RMSE criterion and the sample size n. As the sample size n increases the values of the RMSE of all methods decrease and hence the estimation precision of the parameters increases. It is evident that the MLM and the MOM perform better than the LSM and the WLSM when the sample size is middle or large enough. Only for very small sample sizes the WLSM and the LSM outperform the MLM and the MOM. The WLSM performs better than the LSM. Both these methods are good methods due to their simplicity. For very small sample sizes we recommend the WLSM. For middle or large sample sizes the WLSM is useful alternative to the MLM or the MOM in the situation, when the simple computing is preferred.