> For the complete documentation index, see [llms.txt](/llms.txt).
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- geometry
4 endpoints

# Geometry API

Same bearer token, same credit pool, same JSON envelope as every other endpoint — drop them into apps, sites, workflows, or agents without rebuilding formulas, validation, or docs.
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Surface Area
[
Surface Area Calculator surface-area-calculator
Calculate the surface area of spheres, cylinders, cuboids and cones.
1cr · v2026-04-22
](/tools/surface-area-calculator/) [
Surface Area of a Sphere Calculator surface-area-of-sphere-calculator
Calculate the surface area, volume and diameter of a sphere from its radius.
1cr · v2026-04-22
](/tools/surface-area-of-sphere-calculator/)
Volume
[
Volume Calculator volume-calculator
Calculate the volume of spheres, cylinders, cuboids, cones and rectangular pyramids.
1cr · v2026-04-22
](/tools/volume-calculator/) [
Volume of a Sphere Calculator volume-of-sphere-calculator
Calculate the volume, surface area and diameter of a sphere from its radius.
1cr · v2026-04-22
](/tools/volume-of-sphere-calculator/)
API OPERATIONAL v1 · OpenAPI 3.1 · MCP 2025-06-18
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