WACC Calculator
Use the WACC Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “wacc formula”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
WACC = E/(D + E) × cost of equity + D/(D + E) × pre-tax cost of debt × (1 − tax rate).
Worked example
Worked example: Inputs: Market value of equity: 700,000; Market value of debt: 300,000; Cost of equity: 10 %; Pre-tax cost of debt: 6 %; Corporate tax rate: 21 %. Outputs: Weighted average cost of capital: 8.422 %.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- OpenStax, Rice University: Calculating the Weighted Average Cost of CapitalReference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
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Frequently asked questions
How does the WACC Calculator work?
WACC = E/(D + E) × cost of equity + D/(D + E) × pre-tax cost of debt × (1 − tax rate).
What should I enter?
Market value of equity, Market value of debt, Cost of equity, Pre-tax cost of debt, Corporate tax rate
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · finance-wacc-v2 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team