Ratio Calculator

Calculate a ratio from two values, simplify it automatically, and review total parts plus each side's share.

Calculate a ratio instantly

Enter two values to compare them as a ratio, simplify the relationship, and review each side's share of the total.

Compare two values as a ratio and see each side's share

Use this ratio calculator when you need to compare two values, simplify the ratio, and understand how much of the total each side represents. It is useful for recipes, mix ratios, budgeting, splits, and quick number comparisons.

Enter two values to calculate the ratio instantly.

Calculated ratio result

Review the simplified ratio first, then compare the original ratio, total parts, and each side's percentage share.

No result

Enter values to calculate a ratio.

The simplified ratio will appear here as soon as both inputs are valid.

This tool compares the two values as parts of one ratio and shows each side's share of the total.

How to use the ratio calculator

  1. Enter the first value you want to compare.
  2. Enter the second value of the ratio.
  3. Review the main result to see the simplified ratio instantly.
  4. Use the supporting cards to compare the original ratio, total parts, and each side's percentage share.
  5. Use Example to load a sample ratio or Clear to reset both inputs.

Ratio calculator examples

  • What is the ratio of 12 to 18?

  • How do you calculate a ratio and percentage share from two numbers?

  • What is 30 to 70 as a ratio?

What this ratio calculator covers

This tool compares two values as a ratio and simplifies the result to the smallest whole-number form. It also shows the original ratio, total parts, and how much each side contributes as a percentage share.

When a ratio calculator is useful

A ratio calculator is useful when you need to compare quantities, split totals, check proportions, or explain how two values relate to each other. Use it for mixes, class sizes, inventory splits, household budgets, recipes, and other side-by-side quantity questions.

Ratio calculator vs ratio simplifier

A ratio simplifier focuses on reducing two values to the smallest whole-number ratio. This ratio calculator also shows the total parts and each side's percentage share, which makes it more useful when you care about distribution and not only the simplified form.

Ratio calculator FAQs

Does this ratio calculator simplify the ratio automatically?

Yes. The tool reduces the ratio to the simplest whole-number form after scaling decimal inputs when needed.

Can I use decimals in the ratio?

Yes. The calculator supports decimal inputs and scales them to a common whole-number basis before simplifying the ratio.

What do the share percentages mean?

The share percentages show how much each side contributes to the combined total of both values. This helps when the ratio is being used to describe a split, mix, or allocation.

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