As we know One Np is equal to 0.8686000004 B (1 Np = 0.8686000004 B).

To convert Neper to Bel, multiply your Np figure by 0.8686000004.

Example : convert 25 Np to B:

25 Np = 25 × 0.8686000004 B = B

To convert Bel to Neper, divide your B figure by 0.8686000004.

Example : convert 25 B to Np:

25 B = 25 ÷ 0.8686000004 Np = Np