According to the Hindu Marriage Act, 1955, "Sapinda relationship" refers to:

Under Section 3(f) of the Hindu Marriage Act, 1955, "sapinda relationship" with reference to any person extends as far as the third generation (inclusive) in the line of ascent through the mother, and the fifth generation (inclusive) in the line of ascent through the father, the line being traced upwards in each case from the person concerned, who is counted as the first generation.