Modern Perimeter Calculator
Calculate perimeter of any shape with our sleek, modern calculator. Instant results with beautiful visualizations and step-by-step solutions.
Perimeter Calculator
P = 2(length + width)
Quick Examples
Click any example to see instant calculations
Rectangle
5 × 3 units
Square
4 × 4 units
Circle
Radius = 5
Triangle
3-4-5 sides
Perimeter Calculator Formulas & How to Calculate Perimeter
| Shape | Formula | Example |
|---|---|---|
| Rectangle | P = 2(length + width) | P = 2(5 + 3) = 16 units |
| Square | P = 4 × side | P = 4 × 4 = 16 units |
| Circle | P = 2πr or P = πd | P = 2π(5) = 31.42 units |
| Triangle | P = a + b + c | P = 3 + 4 + 5 = 12 units |
| Regular Polygon | P = n × side length | Pentagon: P = 5 × 6 = 30 units |
Real-World Perimeter Calculator Applications
Home & Garden Projects
Calculate fencing needed for your yard, trim for rooms, or border materials for garden beds. Perfect for DIY projects and home improvement.
Education & Homework
Perfect for students learning geometry, teachers creating worksheets, and parents helping with math homework. Includes step-by-step solutions.
Architecture & Design
Calculate perimeters for floor plans, building layouts, and design projects. Essential for architects, engineers, and designers.
Sports & Fitness
Calculate track lengths, field perimeters, and running distances. Useful for coaches, athletes, and fitness enthusiasts.
Manufacturing & Construction
Calculate material requirements, boundary measurements, and production specifications. Essential for contractors and manufacturers.
Arts & Crafts
Calculate frame sizes, border lengths, and material needs for art projects, scrapbooking, and craft activities.
Frequently Asked Questions - Perimeter Calculator
How do I use this free perimeter calculator?
Our online perimeter calculator works for all shapes. Simply select your shape (rectangle, square, circle, or triangle), enter the required measurements, and get instant results with formulas and step-by-step calculations.
What shapes can I calculate perimeter for?
Our perimeter calculator supports rectangles, squares, circles (circumference), triangles, and provides formulas for regular polygons. Each shape has its specific formula and calculation method.
What's the difference between perimeter and circumference?
Perimeter is the distance around any closed shape, while circumference specifically refers to the perimeter of a circle. Our calculator handles both terms correctly for each shape type.
Is this perimeter calculator free for students and teachers?
Absolutely. Our free online perimeter calculator is perfect for students learning geometry, teachers creating assignments, and anyone needing quick perimeter calculations for homework, projects, or professional work.
Why Use Our Free Online Perimeter Calculator?
Multiple Shape Support
Calculate perimeter for rectangles, squares, circles, triangles, and polygons. Each shape includes the correct formula and step-by-step calculations for accurate results.
Instant & Accurate Results
Get precise perimeter calculations instantly with detailed formulas and explanations. Perfect for homework, professional projects, and real-world applications.
Educational Features
Learn while you calculate with step-by-step solutions, formula explanations, and examples. Great for students, teachers, and anyone learning geometry.
Free & Easy to Use
Completely free perimeter calculator with no registration required. Simple interface works on all devices - desktop, tablet, and mobile.