WACC Calculator (Weighted Average Cost of Capital)

Written by Great Medico

Updated September 25, 2026 •2 min read

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WACC Calculator (Weighted Average Cost of Capital) is most useful when you want to see exactly how the entered assumptions drive the result. Changing one form value at a time makes the effect easier to follow.

What this calculator does

WACC Calculator (Weighted Average Cost of Capital) calculates weighted average cost of capital from equity and debt weights, their required returns, and the corporate tax rate. It works from equity weight, cost of equity, debt weight, pre-tax cost of debt, and corporate tax rate. For WACC Calculator (Weighted Average Cost of Capital), the calculator does not pull live quotes or analyst estimates, which keeps the scenario reproducible with the numbers you supply.

How to use it

Start with Equity weight, Cost of equity, Debt weight, Pre-tax cost of debt, and Corporate tax rate. For WACC Calculator (Weighted Average Cost of Capital), enter percentage or rate fields on the scale displayed by the form rather than converting them to an unstated format. Before calculating, recheck Equity weight, Cost of equity, Debt weight against the source numbers you intend to analyze.

How the calculation works

WACC = E/V × Re + D/V × Rd × (1 − T). The calculator expects the equity and debt weights to total 100%. WACC Calculator (Weighted Average Cost of Capital) substitutes the relevant form values into this equation without adding an unstated market assumption. For WACC Calculator (Weighted Average Cost of Capital), an unusual result is a reason to verify the entered values and the formula shown here before drawing a conclusion.

Example

With 60% equity at 10%, 40% debt at 6%, and a 25% tax rate, WACC is 7.8%. Use the same WACC Calculator (Weighted Average Cost of Capital) steps with your own form values rather than treating the sample as a target.

How to interpret the result

The result is a blended financing-rate estimate often used as a hurdle or discount-rate reference when the project has risk similar to the firm’s capital base. The WACC Calculator (Weighted Average Cost of Capital) result is most informative when the source values and period basis behind the displayed inputs are documented consistently.

Limitations and notes

The calculator assumes the entered weights and component costs are appropriate and stable. It does not estimate market values, preferred stock, issuance costs, changing leverage, country risk, or a project-specific risk adjustment. Before relying on an older WACC Calculator (Weighted Average Cost of Capital) result, confirm that each displayed input still reflects the scenario being analyzed.