Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Math
Combination Calculator
Calculate the number of unordered selections of r items from n distinct items, where the order does not matter. Ideal for lottery draws, committees, and poker hands.
Fill in the required fields to see your result.
Algebra
Quadratic Formula Calculator
Finds all real solutions to any quadratic equation of the form ax² + bx + c = 0. Use it when factoring is difficult or impossible and you need exact roots fast.
Fill in the required fields to see your result.
Key differences
| Combination Calculator | Quadratic Formula Calculator | |
|---|---|---|
| Category | Math | Algebra |
| Inputs required | 2 | 3 |
| Result | C(n,r) | First Root (x₁) |
| What it does | Calculate the number of unordered selections of r items from n distinct items, where the order does not matter. Ideal for lottery draws, committees, and poker hands. | Finds all real solutions to any quadratic equation of the form ax² + bx + c = 0. Use it when factoring is difficult or impossible and you need exact roots fast. |