Measure straight across the widest part of the circle through its center
Use the formula diameter = 2 × radius
Use the formula diameter = circumference ÷ π
If you know the area, use diameter = 2 × √(area ÷ π)
Measure straight across the widest part of the circle through its center
Use the formula diameter = 2 × radius
Use the formula diameter = circumference ÷ π
If you know the area, use diameter = 2 × √(area ÷ π)