I need the area of a 2D shape
Use AreaCalc for rectangles, squares, triangles, circles, trapezoids, parallelograms, ellipses and sectors. Results are expressed in square units.
Everyday geometry
Choose the right area or volume calculator
Area measures a flat region in square units; volume measures the space inside an ideal solid in cubic units. This guide connects two focused calculators without merging their formulas or changing their existing product URLs.
Formula shown with each resultSquare and cubic units kept distinctNo account required
Start with the shape
Decide whether the question is two- or three-dimensional
Choose the quantity before entering measurements. A flat outline and a solid can use similar names but require different formulas and result units.
I need the volume of a 3D solid
Use VolumeCalc for prisms, cubes, cylinders, cones, spheres, pyramids and ellipsoids. Results are expressed in cubic units or an explicitly converted volume unit.
My measurements use different units
Convert every length to one shared unit before applying a formula. Do not combine centimetres and metres in the same substitution.
Four worked checks
Keep the formula and substituted numbers together
These elementary examples show the difference between square and cubic results.
- Rectangle 6 × 4 = 24 square units
- Area uses two perpendicular lengths: A = width × height = 6 × 4 = 24.
- Circle radius 3 = 9π ≈ 28.274 square units
- Area uses the radius, not the diameter: A = πr² = π × 3².
- Rectangular prism 6 × 4 × 10 = 240 cubic units
- Volume extends a base through a third dimension: V = length × width × height.
- Cylinder radius 3, height 10 = 90π ≈ 282.743 cubic units
- Multiply the circular base area by height: V = πr²h = π × 3² × 10.
Focused collection
Two calculators for common geometric shapes
Open the tool that matches the quantity. Each destination keeps its own canonical URL, supported shapes and explicit limitations.
Reliable sequence
A four-step geometry check
- 1
Identify the exact shape
Choose the flat figure or ideal solid whose definition matches the measurements you actually have.
- 2
Label and normalize the lengths
Distinguish radius from diameter and perpendicular height from slanted length, then convert every input to one unit.
- 3
Use the matching formula
Enter the values in the focused calculator and keep the displayed substitution beside the result.
- 4
Check dimensions and scope
Confirm that area ends in square units and volume in cubic units. Independently verify important results and do not treat ideal-shape arithmetic as a material, capacity or safety assessment.
Common questions
Area and volume basics
What is the difference between area and volume?
Area measures a two-dimensional region and uses square units. Volume measures the three-dimensional space inside an ideal solid and uses cubic units.
Can square units be converted directly to cubic units?
No. A third independent length is required to turn an area into a volume; no unique volume follows from area alone.
Can I enter centimetres and metres together?
Convert all lengths to one unit first. Mixing length units inside one formula produces a result that does not have one clear square or cubic unit.
Do these calculators model real objects or materials?
They calculate ideal geometric shapes only. They do not certify capacity, material quantity, structural suitability, fit, tolerances or safety.
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