Vector dot product
Calculate vector dot product using the values and assumptions you provide.
Your inputs stay in your browser. Displayed results are rounded to a maximum of 12 significant digits.
Method and assumptions
Method version 1.0.0 · Updated
Calculate
Formula: A · B = ax·bx + ay·by + az·bz
Calculate vector dot product using the values and assumptions you provide.
- ax
- Vector A · x
- ay
- Vector A · y
- az
- Vector A · z
- bx
- Vector B · x
- by
- Vector B · y
- bz
- Vector B · z
Results depend on the assumptions entered; verify professional or safety-critical decisions independently.
Calculate with code
These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.
JavaScript
const a = [1, 2, 3], b = [4, 5, 6];
console.log(a.reduce((sum, x, i) => sum + x * b[i], 0)); // dot product = 32TypeScript
const a: number[] = [1,2,3], b: number[] = [4,5,6];
const dot = a.reduce((sum, x, i) => sum + x * b[i]!, 0);
console.log(dot); // 32Python
a, b = [1,2,3], [4,5,6]
print(sum(x*y for x,y in zip(a,b))) # dot product = 32Java
int dot = 1*4 + 2*5 + 3*6;
System.out.println(dot); // 32C#
int dot = 1*4 + 2*5 + 3*6;
Console.WriteLine(dot); // 32