Ratio Scaling Calculator

Scale a ratio up or down using a multiplier factor while maintaining exact proportional balance.

Enter > 1 to scale up, or < 1 (e.g. 0.5) to scale down.
Scaled Ratio
6 : 15
Scaled Term A 6 (was 2)
Scaled Term B 15 (was 5)
Step-by-Step Scaling Derivation:
  1. Original ratio: 2 : 5 with multiplier scale factor × 3.
  2. Multiply Term A: 2 × 3 = 6.
  3. Multiply Term B: 5 × 3 = 15.
  4. Verify equality: 6 / 15 = 0.4, which equals original 2 / 5 = 0.4.
  5. Scaled ratio is 6 : 15.

When to Use Ratio Scaling

Scaling ratios allows you to increase or decrease quantities while preserving exact relative proportions.

🍳 Scaling Recipes:

If a cookie recipe calls for 2 cups flour to 1 cup sugar (2:1) for 12 cookies, multiplying by 2.5 scales the ingredients to 5 cups flour and 2.5 cups sugar for 30 cookies.

📐 Scale Drawings & Maps:

Architectural blueprints and engineering diagrams use scaling factors (e.g. 1:50 or 1:100) to convert real dimensions to model dimensions.

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We strive for 100% mathematical precision. If you encounter an unexpected calculation result, broken input, or unclear explanation on Ratio Scaling Calculator, please let our editorial team know.

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✓ Verified & Peer Reviewed
Reviewed for accuracy: October 2026 by Ratio Calculator Mathematical Review Team • Topic: Proportional Scaling & Multipliers