  Mass estimates of K giants are generally very uncertain. Traditionally,
stellar masses of single field stars are determined by comparing their location
in the Hertzsprung-Russell diagram with stellar evolutionary models. Applying
an additional method to determine the mass is therefore of significant interest
for understanding stellar evolution. We present the time series analysis of 11
K giants recently observed with the WIRE satellite. With this comprehensive
sample, we report the first confirmation that the characteristic acoustic
frequency, nu_max, can be predicted for K giants by scaling from the solar
acoustic cut-off frequency. We are further able to utilize our measurements of
nu_max to determine an asteroseismic mass for each star with a lower
uncertainty compared to the traditional method, for most stars in our sample.
This indicates good prospects for the application of our method on the vast
amounts of data that will soon come from the COROT and Kepler space missions.
