R63

R63 may refer to:

Roads

 * R63 expressway (Czech Republic)
 * R63 (South Africa)

Other uses

 * HMS Concord (R63), a destroyer of the Royal Navy
 * HMS Venerable (R63), an aircraft carrier of the Royal Navy
 * Mercedes-Benz R63 AMG, a performance-oriented MPV
 * R63: Possible risk of harm to the unborn child, a risk phrase
 * a size of light bulb reflector
 * clipping of Rule 63