Rectangular box
8 cm x 5 cm x 3 cm120 cm^3
Volume Calculator
Use this free volume calculator to find cubic volume for rectangular prisms, cubes, cylinders, spheres, and cones. Enter matching length units, then read the cubic-unit result.
Unit-aware inputs Formula note Example numbers Tab-only history
V = length x width x height120 cm^3
- Length
- 8 cm
- Width
- 5 cm
- Height
- 3 cm
Steps
- Choose rectangular prism mode.
- Use V = length x width x height.
- Substitute the entered measurements.
- The volume is 120 cm^3.
How to use the Volume Calculator
- Choose the solid shape: rectangular prism, cube, cylinder, sphere, or cone.
- Enter the required radius, height, side, length, or width values.
- Press Calculate volume to see the cubic result and formula steps.
- Use examples, recent answers, or copy the result for notes or homework.
What people use it for
Check a classroom solid-geometry answer before copying it into notes.
Estimate the inside space of a box, tube, ball-shaped object, or cone-shaped container.
Compare how changing radius, height, length, width, or side length changes volume.
Keep cubic units straight before converting to litres, gallons, or cubic yards in another tool.
Separate volume from surface area when a project needs capacity, not outside covering.
Quick examples
Cylinder can
r = 3 cm, h = 10 cm282.74 cm^3
Sphere
r = 4 cm268.08 cm^3
Cone
r = 3 cm, h = 9 cm84.82 cm^3
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the Volume Calculator See slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Calculators Browse related calculators and utilities in the same category.
- Calculator and utility guides Find more guides that use real tool inputs and example numbers.
- All free tools Search every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Quick answers about formulas, units, valid measurements, examples, copying, and private in-browser history.
Which shapes are supported?
The Volume Calculator supports rectangular prism, cube, cylinder, sphere, and cone modes. Pick the shape first so the page only asks for the measurements that shape needs.
What units should I use?
Use the same length unit for every measurement. If length is in centimeters, width and height should also be in centimeters, and the answer comes out in cubic centimeters.
What do the main Volume Calculator inputs mean?
The main inputs are the numbers, operation, mode, or known values the calculator needs. Keep units consistent, enter percentages the way the page label shows, and use the examples as a quick check before trusting the answer.
How should I read the Volume Calculator answer?
Read the headline answer, then check the supporting lines and examples to understand how the calculator got there. If one input changes, rerun the tool and compare the new answer instead of guessing.
What should I double-check before trusting the Volume Calculator?
Check units, signs, rounding, and the selected mode before copying the answer. If the number feels weird, rerun one of the examples first, then put your own values back in slowly.
Does this convert cubic units to litres or gallons?
No. This page finds cubic volume for solid shapes. Use the Conversion Calculator after this if you need litres, gallons, cubic feet, or cubic yards.
What formula does cylinder volume use?
Cylinder volume uses V = pi x r^2 x h, where r is radius and h is height. If you measured diameter, divide it by 2 before entering radius.
What formula does cone volume use?
Cone volume uses V = pi x r^2 x h / 3. That is one third of a cylinder with the same radius and height.
Is volume the same as surface area?
No. Volume measures the space inside a solid in cubic units. Surface area measures the outside covering in square units.
Can I use this for a tank or liquid amount?
Use it only as a shape-volume starting point. Real tanks, pools, and containers can have rounded corners, fill lines, slopes, caps, fittings, or labels that change the usable liquid amount.
Can I calculate surface area here?
This tool is for cubic volume. Use the Surface Area Calculator when you need the outside area of a solid.
Is my volume history private?
Yes. Recent volume answers stay only in the current browser tab while you use the page. They are not sent to a server.
Related tools
Surface Area Calculator Calculate surface area for boxes, cubes, cylinders, spheres, and cones. Open Area Calculator Calculate flat-shape area for rectangles, triangles, circles, trapezoids, and parallelograms. Open Circle Calculator Find radius, diameter, circumference, and area from one circle measurement. Open Conversion Calculator Convert length, mass, volume, and temperature units with clear formula steps. Open