Multiplication is repeated addition and the basis of areas, volumes, prices and scaling. With many factors, signs and decimals it is easy to slip; the calculator handles them all.
How to use the Multiplication Calculator
- How many factors?
- Factor 1
- Factor 2
- Factor 3
- Factor 4
- Factor 5
- Factor 6
- Factor 7
- Factor 8
- Factor 9
- Factor 10
Results update as you type, and everything is calculated in your browser.
How it works
The factors are multiplied in order. The sign of the product is negative when an odd number of factors is negative.
Inputs explained
| Field | What to enter |
|---|---|
| How many factors? | Choose one: 2, 3, 4, 5 … |
| Factor 1 | A number |
| Factor 2 | A number |
| Factor 3 | A number |
| Factor 4 | A number |
| Factor 5 | A number |
| Factor 6 | A number |
| Factor 7 | A number |
| Factor 8 | A number |
| Factor 9 | A number |
| Factor 10 | A number |
Example values
How the main result changes when Factor 1 changes and everything else stays at the example values above:
| Factor 1 | Product |
|---|---|
| 6.25 | 50 |
| 9.38 | 75 |
| 12.5 | 100 |
| 15.63 | 125 |
| 18.75 | 150 |
| 25 | 200 |
Formula
Product = a₁ × a₂ × … × aₙ
Worked example
Inputs — How many factors?: 2; Factor 1: 12.5; Factor 2: 8.
Results — Product = 100.
Key terms
- Factor
- A number being multiplied.
- Product
- The result of multiplication.
Frequently asked questions
What are the parts of a multiplication called?
The numbers are factors (or multiplier and multiplicand); the result is the product.
Does the order of factors matter?
No – multiplication is commutative and associative.
What is a negative times a negative?
Positive.
What happens if one factor is zero?
The product is zero.