Rhombus Area Calculator
Find the area, side length and perimeter of a rhombus when you know the lengths of both diagonals. Enter first diagonal and second diagonal to see…
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Find the area, side length and perimeter of a rhombus when you know the lengths of both diagonals. Enter first diagonal and second diagonal to see area, side length and perimeter when you calculate.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (first diagonal = 10, second diagonal = 6), the results are: area 30.000; side length 5.831; perimeter 23.324.
Quick reference: first diagonal vs result
Reference table based on the example values; it is not your calculation result.
| First diagonal | Area | Side length | Perimeter |
|---|---|---|---|
| 5 | 15.000 | 3.905 | 15.620 |
| 10 | 30.000 | 5.831 | 23.324 |
| 20 | 60.000 | 10.440 | 41.761 |
| 50 | 150.000 | 25.179 | 100.717 |
| 100 | 300.000 | 50.090 | 200.360 |
| 200 | 600.000 | 100.045 | 400.180 |
Frequently asked questions
What formula does this calculator use?
Area = d1 × d2 ÷ 2; Side length = sqrt((d1 ÷ 2)^2+(d2 ÷ 2)^2); Perimeter = 4 × sd. Variables: d1 = first diagonal, d2 = second diagonal.
What do I need to enter?
You need first diagonal, second diagonal. Results update as you type.
What is an example result?
With the default inputs (first diagonal = 10, second diagonal = 6), the results are: area 30.000; side length 5.831; perimeter 23.324.
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