D = 2r
Diameter
Diameter is twice the radius and passes through the center of the circle.
NUT ENGINEERING TOOLS
Circle Solver
See It. Solve It. Understand It.
Enter any one known circle measurement. Nut calculates radius, diameter, circumference, and area.
Live Geometry
Diagram updates when the circle is solved.
Enter What You Know
Enter one known value and leave the others blank.
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Calculated Results
Complete circle geometry from the measurement you entered.
Radius
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Diameter
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Circumference
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Area
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03
Your Solution
Nut substitutes your actual measurement into the circle formulas.
Enter one known value and solve the circle to see the calculation steps.
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How It Works
Circle measurements are all related through radius and π.
C = 2πr
Circumference
Circumference is the distance around the outside of the circle.
A = πr²
Area
Area measures the surface enclosed by the circle.
r = D ÷ 2
Radius
Radius is the distance from the center to the circle edge.
Nut Industries V2 — Development Preview