Enter the total contribution and an individual’s contribution into the calculator to determine the individual’s contribution ratio as a percentage of the total.

Contribution Ratio Formula

The following formula is used to calculate the contribution ratio:

CR = (IC / TC) * 100


  • CR is the contribution ratio (%)
  • IC is the individual contribution ($)
  • TC is the total contribution ($)

To calculate the contribution ratio, divide the individual contribution by the total contribution and then multiply by 100 to get the percentage.

What is a Contribution Ratio?

A contribution ratio represents the proportion of an individual’s contribution to the total contribution in a collective effort or financial context. It is often expressed as a percentage to easily understand the relative size of the individual’s contribution compared to the whole. This metric is useful in various scenarios, such as determining a member’s share in a group investment, calculating an employee’s contribution to a project, or assessing a donor’s impact in fundraising activities.

How to Calculate Contribution Ratio?

The following steps outline how to calculate the Contribution Ratio.

  1. First, determine the total contribution (TC) in dollars.
  2. Next, determine the individual contribution (IC) in dollars.
  3. Use the formula CR = (IC / TC) * 100.
  4. Finally, calculate the Contribution Ratio (CR) in percentage.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Total contribution (TC) = $500

Individual contribution (IC) = $125