CAPM Calculator - Expected Return Using Beta

The CAPM calculator estimates a security's required or expected return using the Capital Asset Pricing Model. Analysts use CAPM in equity valuation, hurdle-rate setting, portfolio review, and cost-of-equity estimates because it connects expected return to systematic market risk. The form asks for the risk-free rate, beta, expected market return, and an optional investment amount so the percentage return can be translated into a dollar expectation. The formula is: CAPM expected return = risk-free rate + beta x (expected market return - risk-free rate). The term in parentheses is the market risk premium. Beta scales that premium: a beta of 1.2 assumes the asset is more sensitive to market moves than the market portfolio, while a beta below 1 implies lower systematic risk. The calculator shows the market risk premium and the expected annual gain on the entered investment amount to make the components easy to audit. Use CAPM when comparing stocks with different betas, checking whether a valuation model's discount rate is reasonable, or explaining why a riskier asset should demand a higher expected return. It is also useful for scenario analysis: changing the risk-free rate or market return shows how macro assumptions can move the required return even when company fundamentals do not change. CAPM is a model, not a guarantee. Beta is backward-looking and can be unstable, the chosen market return is an assumption, and the model does not capture company-specific risk, liquidity risk, leverage changes, currency exposure, or behavioral factors. For investment decisions, use the result alongside sensitivity analysis, comparable company returns, and a review of business risk. For best results, keep all inputs on the same time basis and currency basis, then save the assumptions beside the output. That practice makes the estimate easier to audit later and prevents a common spreadsheet error: mixing monthly values with annual values or combining before-tax and after-tax figures. Re-run the scenario with conservative and optimistic assumptions before using the result in a budget, filing decision, trade review, or transaction memo.