Top: conversion coefficient describing mode conversion from acoustic to magnetic waves as a function of inclination angles. The full red lines are mode conversion according to Schunker & Cally (2006) (Eq. (22)) in three different points within the loop exterior at the equipartition layer. The dotted black line is calculated according to Eq. (25) at z = 2 Mm and averaged over the whole horizontal plane. The dashed black line is the same, but only considering fluxes in regions with β <  1 (see text). Middle: absolute error of the red curves (Schunker & Cally 2006) compared to the dashed curve (Eq. (25) for β <  1). Bottom: same, but relative error.