Best Brazier
And while it's easy to multiply the length by the width to get total square inches on a standard grill surface, many fire bowls have round grills. What to do? Simply multiple Pi (or 3.14) by 1/2 the diameter and again by 1/2 the diameter. E.g., for an 18-inch grill, it would be 3.14 x 9 x 9 for a surface of 254 square inches.