Use our online tidal force calculator to find the tides raising force given the known parameters. Tidal forces are the reason behind the occurence of tides. This forces are strongly dependent on distance. A slight variation in the distance betweem the two bodies can create a huge difference in the tidal force. It is the secondary effect of the force of gravity. A small difference in the gravity is also referred as Tidal force. Naturally the tidal force of moon is higher than that of the sun.