New photometry of RRab and RRc stars in \omega Cen is used to calibrate their absolute magnitudes M _ { V } as a function of : a ) metallicity ; and b ) the Fourier parameters of light curves in the V 
band .
The zero point of both calibrations relies on the distance modulus to the cluster derived earlier by the CASE project based on observations of the detached eclipsing binary OGLE GC17 .
For RRab variables we obtained a relation of M _ { V } = ( 0.26 \pm 0.08 ) [ { Fe / H } ] + ( 0.91 \pm 0.13 ) .
A dereddened distance modulus to the LMC based on that formula is \mu _ { 0 } = 18.56 \pm 0.14 mag .
The second calibration of M _ { V } , which is based on Fourier coefficients of decomposed light curves , results in the LMC distance of \mu _ { 0 } = 18.51 \pm 0.07 mag .