PangPang ToolsOuter radius (m): 5, Inner radius (m): 3
Ring area: 50.265482 m²Using these sample input values gives the first labelled output above. Assumes concentric circles; inner radius must be smaller than outer radius.
Area & Drawings
Annulus Ring Area Calculator
About this tool
Annulus Ring Area Calculator performs a browser-local calculation using measurements and quantities you control. The results are presented as labelled figures so each number is easy to interpret. Assumes concentric circles; inner radius must be smaller than outer radius.
Circles & arcs
Choose a task. Inputs stay in this page only.
MAKE IT SIMPLE
Result
Worked examples
Questions & answers
Can I use the default numbers for purchasing or safety certification?
No. Replace the examples with your real values. Assumes concentric circles; inner radius must be smaller than outer radius.
MAKE IT SIMPLE
Result
Worked examples
Radius 1 m and a 90-degree sector
3.1416 m² circle and 0.7854 m² sectorEnter a circle radius and sector central angle to see area, circumference, sector area and arc length. Input millimetres and centimetres are normalized to metres in the results.
MAKE IT SIMPLE
Result
Worked examples
Circle radius (m): 4, Central angle (°): 60
Chord length: 4 mUsing these sample input values gives the first labelled output above. For minor arcs with a central angle up to 180 degrees only.
Questions & answers
Can I use the default numbers for purchasing or safety certification?
No. Replace the examples with your real values. For minor arcs with a central angle up to 180 degrees only.