Square Feet to Barns: the quick answer
1 ft² = 9.2903 × 10²⁶ b
1 square foot equals 9.2903 × 10²⁶ barns
To convert square feet to barns, multiply the value by 9.2903 × 10²⁶. To go the other way, multiply barns by 1.07639 × 10⁻²⁷ to get square feet.