WACC Calculator
Calculate weighted average cost of capital from equity, debt, capital costs, and tax rate with a finance-friendly browser-based WACC calculator.
Estimate weighted average cost of capital
Enter the market value of equity and debt, then add the cost inputs to calculate WACC and review the capital-structure breakdown.
Use the current market value of equity, not the book value.
Use the current debt value included in the capital structure.
Enter the expected return on equity as a percentage.
Enter the debt cost before the tax shield is applied.
The tax rate is used to reduce the effective cost of debt.
Live total market value
Waiting for values
V = E + D. WACC needs a total market value greater than zero.
Enter the capital structure to calculate WACC
This page calculates weighted average cost of capital for analysts, students, and investors who want a fast estimate of a company’s blended financing cost.
Why WACC matters in finance
Weighted average cost of capital is often used as a discount rate or benchmark return, because it reflects how much it costs a company to finance itself with both equity and debt.
At a glance
03
quick takeaways built into this calculator section.
- 01
The debt portion is adjusted for the tax shield because interest expense is usually tax-deductible.
- 02
Market values matter because WACC is based on the capital structure investors and lenders are actually pricing.
- 03
A lower WACC can make future cash flows look more valuable, while a higher WACC raises the hurdle rate.
WACC Calculator
This WACC calculator helps estimate a company's weighted average cost of capital from equity, debt, cost of equity, cost of debt, and tax rate inputs. It is useful for finance students, analysts, investors, and anyone reviewing capital structure decisions.
The page keeps the formula visible so you can see how the capital weights and tax shield affect the final percentage instead of treating WACC as a black-box number.
The WACC Formula
WACC = (E / V x Re) + ((D / V x Rd) x (1 - T))
Where:
E = market value of equity
D = market value of debt
V = total market value (E + D)
Re = cost of equity
Rd = cost of debt
T = corporate tax rateWhy the Tax Rate Matters
Debt interest is typically tax-deductible, which reduces the effective after-tax cost of debt. That is why the debt side of the WACC formula includes the tax adjustment.
What This Calculator Shows
The tool calculates total market value first, then applies the capital weights to the cost of equity and the after-tax cost of debt. The result card makes it easier to see how each part of the capital structure contributes to the final WACC percentage.
Who Uses WACC
WACC is commonly used in valuation work, discounted cash flow models, corporate finance coursework, and investment analysis. It is not a standalone buy-or-sell signal, but it is a widely used hurdle rate and discount rate input.
If you also need general percent-change math, use the Percentage Calculator. For pure discount pricing rather than finance capital costs, use the Percent Off Calculator.
How to Use the WACC Calculator
- Enter the market value of equity and debt.
- Enter the cost of equity, cost of debt, and corporate tax rate as percentages.
- Review the live total market value.
- Click Calculate to see the WACC result and the component breakdown.
Important Interpretation Note
A lower WACC often means lower financing friction, but there is no universal "good" WACC number that fits every industry, country, or capital structure. It should always be interpreted in context.
Frequently Asked Questions
What is WACC?
WACC stands for weighted average cost of capital. It blends the cost of equity and the after-tax cost of debt according to their share of the company's capital structure.
Why is the tax rate included in the WACC formula?
Because debt interest usually creates a tax shield, which lowers the effective cost of debt after tax.
What is a good WACC percentage?
There is no universal target. A reasonable WACC depends on the company, the market, the industry, and the risk profile being analyzed.
Is this WACC calculator free?
Yes. It is a free browser-based calculator.
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