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Profitability Index Calculator.
Calculate profitability index from present value and investment.
此计算器尚未完全翻译——部分文本以英文显示。
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01
输入数值
输入时结果会更新。
02 / 答案
Profitability index: 1.5
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Cite this calculator
Canonical URL: https://mathify.one/zh/finance/profitability-index
Cite as: Mathify. (n.d.). 计算器: Profitability Index. https://mathify.one/zh/finance/profitability-index
Use Cases
Project Investment Screening
Quickly compare multiple projects by their profitability index to prioritize those with the highest value per dollar invested.
Example: Compare a project with PI 1.5 vs. 1.2; the first is more attractive.
Capital Budgeting Decisions
Use the PI to decide whether to accept or reject a single project based on whether the index exceeds 1.
Example: If PI is 0.95, reject the project as it may not recover costs.
Frequently Asked Questions
- What does the profitability index tell you?
- The profitability index (PI) measures the ratio of the present value of future cash inflows to the initial investment. A PI greater than 1 indicates a potentially profitable project, while a PI less than 1 suggests it may not cover costs.
- How is the profitability index calculated?
- Simply divide the present value of future inflows by the initial investment. For example, if the present value of inflows is $120,000 and the initial investment is $100,000, the PI is 1.2.
- What is a good profitability index?
- Generally, a PI of 1 or higher is considered acceptable, as it means the project generates at least as much value as it costs. A PI above 1 indicates a positive net present value.
Tips & Common Mistakes
Tips
- Ensure the present value of inflows is calculated using an appropriate discount rate that reflects the project's risk.
- Use the profitability index alongside net present value (NPV) for a more comprehensive analysis.
- When comparing projects of different sizes, PI helps normalize the value per unit of investment.
- Double-check that the initial investment includes all upfront costs, not just the purchase price.
Common Mistakes to Avoid
- Using the nominal future cash flows instead of their present value, which overstates the PI.
- Forgetting to include all initial investment costs, such as installation or working capital, leading to an inflated PI.
- Comparing PIs of projects with different risk levels without adjusting the discount rate.
Last updated: August 13, 2026