Circle & Sphere Calculator
Calculate area, circumference, diameter, and volume from radius or diameter
Input
Enter radius or diameter to calculate
Visual Diagram
Circle Calculations
Radius (r)
10 units
Diameter (d)
20 units
d = 2r
Circumference (C)
62.8319 units
C = 2πr
Area (A)
314.1593 units²
A = πr²
Sphere Calculations
Surface Area (SA)
1256.6371 units²
SA = 4πr²
Volume (V)
4188.7902 units³
V = (4/3)πr³
You Might Also Like
Explore more tools in this category
Prime Number Generator
Generate prime numbers in any range using efficient algorithms
Factorial Calculator
Calculate factorials, permutations, and combinations with steps
Perfect Square Calculator
Check if a number is a perfect square and find square roots
Perfect Cube Calculator
Check if a number is a perfect cube and find cube roots
Cube Root Calculator
Calculate cube roots with simplification and step-by-step solutions
RMS Calculator
Calculate Root Mean Square for datasets, AC voltage and current
Acceleration Calculator
Calculate acceleration using velocity, force, distance, or gravity
Dew Point Calculator
Calculate dew point, heat index, humidex, and comfort levels
Earthquake Calculator
Calculate earthquake magnitude, energy, intensity, and compare seismic events
About Circle & Sphere Calculator
Calculate Circle and Sphere Properties
This calculator helps you find all the important properties of circles and spheres. Simply enter the radius or diameter, and get instant calculations for area, circumference, volume, and surface area with formulas.
Features
- Input by radius or diameter
- Circle area calculation
- Circle circumference calculation
- Sphere volume calculation
- Sphere surface area calculation
- Visual diagram with measurements
- Formulas displayed for each result
- High precision calculations
- Real-time updates
- Clean, modern interface
Circle Formulas
Diameter: d = 2r
Radius: r = d/2
Circumference: C = 2πr = πd
Area: A = πr²
Sphere Formulas
Surface Area: SA = 4πr²
Volume: V = (4/3)πr³
How to Use
- Choose whether to input radius or diameter
- Enter your measurement value
- View all calculated properties instantly
- Check the visual diagram for reference
- Use the formulas to understand the calculations
Common Uses
- Geometry homework and assignments
- Engineering and design calculations
- Architecture and construction planning
- Physics and mathematics problems
- Educational purposes and learning
Note
All calculations use the mathematical constant π (pi ≈ 3.14159). Results are displayed with up to 4 decimal places for precision. The units shown are generic - apply your specific units (cm, m, inches, etc.) as needed.