Inverse rule of three

🔁 Inverse proportion keeps the product constant: A1 × B1 = A2 × B2.

So A2 = (A1 × B1) / B2.

How to use Inverse rule of three

1. Enter the requested values in each field.
2. Click the calculate button.
3. Read the result and adjust values if needed.

Frequently asked questions

What is Inverse rule of three and what is it for?

Calculate A2 from A1, B1, and B2 in inverse proportion.

How do I use Inverse rule of three step by step?

Enter the form values, click "calculate", and review the result instantly.

Is Inverse rule of three free to use?

Yes. You can use this calculator online for free on mobile and desktop.

How accurate is Inverse rule of three?

🔁 Inverse proportion keeps the product constant: A1 × B1 = A2 × B2. So A2 = (A1 × B1) / B2.

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