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Weighted Average Cost of Capital Calculator

This calculator computes the Weighted Average Cost of Capital (WACC), which represents a company's average cost of raising capital from equity and debt. It’s widely used in valuation, investment analysis, and corporate finance decision-making.

WACC – Capital Cost Estimator

Input Fields
E
$
Market value of equity (e.g. market cap)
D
$
Market value of total debt
Re
%
Required return on equity capital
Rd
%
Effective interest rate on debt
T
%
Corporate tax rate
If enabled, the result will update automatically when you change any value.

WACC Formula

Formula
$$\text{WACC} = \left( \frac{E}{V} \times R_e \right) + \left( \frac{D}{V} \times R_d \times (1 – T) \right)$$

Where:

  • $$E$$ = Market value of equity
  • $$D$$ = Market value of debt
  • $$V$$ = Total capital (E + D)
  • $$R_e$$​ = Cost of equity
  • $$R_d​$$ = Cost of debt
  • $$T$$ = Corporate tax rate

Explanation:
WACC shows the average rate a company pays for using capital. It reflects the blended cost of both equity and debt financing, adjusted for tax benefits on interest.

WACC is a fundamental metric in:

  • Discounted Cash Flow (DCF) valuations
  • Evaluating investment projects
  • M&A analysis and capital budgeting

Example Variables:

  • Equity: $600,000
  • Debt: $400,000
  • Cost of equity: 8%
  • Cost of debt: 5%
  • Tax rate: 30%

$$\text{WACC} = \left( \frac{600{,}000}{1{,}000{,}000} \times 0.08 \right) + \left( \frac{400{,}000}{1{,}000{,}000} \times 0.05 \times (1 – 0.3) \right) = 0.048 + 0.014 = \mathbf{0.062} \ (\mathbf{6.2\%})$$

Use Cases:

  • Determining hurdle rate for new investments
  • Business valuation
  • Portfolio return comparison

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