Convert 1 square millimeter to barn

1 mm² (square millimeter) is equal to 10,000,000,000,000,000,000,000 b (barn). To convert from square millimeter to barn, multiply by 10,000,000,000,000,000,000,000 or divide by 0.0000000000000000000001.

• 1 mm² × 1.0E+22 = 1.0E+22 b
• 1 mm² ÷ 1.0E-22 = 1.0E+22 b