WACC Calculator

Build your Weighted Average Cost of Capital step-by-step — with CAPM sub-calculator, live formula view, and sensitivity analysis.

Quick Presets

Panel 01

Capital Structure

Define how the firm is financed. Equity + Debt weights must sum to 100%.

Equity Weight % Required

Debt Weight % Required

E/V = — | D/V = —

Panel 02

Cost of Equity — CAPM

K_e = R_f + β × ERP

Risk-Free Rate % Required

Equity Risk Premium % Required

Beta (β) Required

K_e = — + — × — = —

Panel 03

Cost of Debt

Use the pre-tax yield on the firm's debt. After-tax cost = K_d × (1 − T).

Cost of Debt (pre-tax) % Required

K_d (pre-tax) = —

Panel 04

Tax Rate & Final WACC

The tax shield on debt reduces its effective cost. Use the marginal corporate tax rate.

Tax Rate % Required

WACC = (E/V × K_e) + (D/V × K_d × (1 − T))
= —

Fill in all fields to calculate WACC.

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Live Preview

Formula View

—%

WACC = (E/V × Ke) + (D/V × Kd × (1 − T))

              = (— × —) + (— × — × (1 − —))
            
              = —

K_e

—

K_d (at)

—

WACC

—

Sensitivity Matrix

WACC × K_e / K_d Scenarios

Columns: K_e ± 2% | Rows: K_d ± 1% | Base case highlighted

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