Risk Calculator
Compare investment risk between two options using the risk formula: Risk = Probability × Loss. Free online risk assessment tool with charts, breakdowns, and safer option identification.
About This Calculator
The Risk Calculator helps investors compare the quantitative risk of two investment options using the standard risk formula: Risk = Probability of Failure × Loss Amount. By calculating the expected monetary loss for each option, you can make informed decisions about which investment carries lower financial risk.
This tool is useful for anyone evaluating investment opportunities, business ventures, or financial decisions where both the likelihood of failure and the potential loss amount vary between options. The formula provides a simple but effective way to quantify and compare downside risk.
Methodology
The calculator uses the standard risk assessment formula: Risk = P(failure) × Loss. The probability of failure is entered as a percentage (converted to a decimal internally), and the loss amount is the total investment at risk. The result is the expected monetary loss — a single number that combines both the likelihood and severity of failure into one comparable metric.
For example, if Option A has a 12% probability of failure with a $1,000 loss, its risk is $120. If Option B has a 7% probability with a $2,000 loss, its risk is $140. In this case, Option A is the safer choice despite having a higher failure probability, because the potential loss is smaller.
Regional Notes
India: Enter loss amounts in Indian Rupees (₹). The calculator adapts to the INR currency format automatically.
United States: Enter loss amounts in US Dollars ($). The calculator uses USD formatting.
United Kingdom: Enter loss amounts in British Pounds (£). The calculator uses GBP formatting for UK users.
Frequently Asked Questions
How do you calculate risk?
Risk is calculated using the formula: Risk = Probability of Failure × Loss Amount. For example, if an investment has a 12% chance of failure and you stand to lose $1,000, the risk is 0.12 × $1,000 = $120. This quantifies the expected monetary loss from the investment.
What is the difference between risk and probability?
Probability is the likelihood of an event occurring (expressed as a percentage between 0% and 100%), while risk multiplies probability by the potential loss amount to give an expected monetary value. Two investments can have the same probability of failure but very different risk levels if the potential loss amounts differ.
How can I compare two investment options using risk?
To compare two investment options, enter the probability of failure and potential loss amount for each option. The calculator computes risk for both using the risk formula and identifies the safer option (the one with lower risk). This helps investors make informed decisions based on quantitative risk assessment.
Is this risk calculator free to use?
Yes, this risk calculator is completely free to use with no registration required. You can compare unlimited investment options and share your results via URL.
Can I share my risk calculation results?
Yes, the URL saves your input values so you can share the exact calculation. Simply copy the URL after calculating and send it to anyone — they will see the same inputs and results.
Does the risk formula consider potential profit?
No, the basic risk formula (risk = probability × loss) only considers the downside. It does not factor in potential returns or profitability. For a complete investment analysis, consider using this risk calculator alongside a return on investment (ROI) or expected return calculator to balance risk and reward.
What units should I use for probability and loss?
Enter probability as a percentage (e.g., 12 for 12%) and loss amount in your local currency. The calculator automatically converts the percentage to a decimal and computes the risk value in the same currency. For Indian users, enter amounts in rupees (₹); for US users in dollars ($); for UK users in pounds (£).
What is a good risk value for an investment?
A lower risk value indicates a safer investment. Generally, risk values that are small relative to your total investment capital are considered acceptable. The acceptable risk level varies by individual risk tolerance — conservative investors prefer options with the lowest risk, while aggressive investors may accept higher risk for potentially higher returns.