Enter Calculation
Formula
Advertisement
Advertisement
| Width | 5.0 cm |
|---|---|
| Length | 4 cm |
| Area | 20.0 cm² |
| Perimeter | 18 cm |
Note: The rectangle visualization is not to scale. It's just a representation of the shape.
Calculate rectangle angles easily with length and width input. Determine interior angles of rectangles for precise geometry calculations and design projects.
Rectangle Width Calculator
Enter length and width to instantly calculate a rectangle’s perimeter using P = 2(l + w). See the result and your inputs displayed for quick reference.
Calculate the area of a circular sector. Enter the radius and central angle in degrees to get the sector area instantly, using πr²θ/360.
Semi Circle Calculator. Calculate diameter, circumference, and area of a semi-circle using the radius. Visualize the semi-circle's dimensions with an interactive diagram.
Use this online stopwatch to measure time intervals precisely. Start, stop, and reset with ease.
Free online countdown timer. Set hours, minutes, and seconds to count down easily. Simple, fast, and useful for work, study, or daily tasks.
Simple online counter tool. Increase, decrease, or reset numbers instantly. Set custom step values and limits with ease.
Use our free online alarm clock to wake up, stay on schedule, or manage tasks. Set alarms quickly and customize sound and time right in your browser.