Cost of Capital Calculator
Estimate weighted average cost of capital (WACC) from debt, equity, their costs and a tax rate.
Calculator workspace
Enter your values, then calculate to see the result and supporting figures.
How This Cost of Capital Calculator Works
Estimate weighted average cost of capital (WACC) from debt, equity, their costs and a tax rate. The rebuilt page uses calculator-specific logic rather than the legacy page script. Inputs are validated before calculation, and supporting figures are shown with the headline result so the arithmetic is easier to check.
Core method: WACC = E/(D+E) × Re + D/(D+E) × Rd × (1 − tax rate).
How to Use It
- Enter the values requested in the calculator workspace.
- Select Calculate and correct any input highlighted by validation.
- Review the main answer, supporting figures and formula/method shown with the result.
- Use Copy Result, Share Result or Save Result Image if you need to keep the calculation.
Worked Example
With 60% equity at 12% and 40% debt at 7% after 25% tax, WACC is about 9.3%.
Common Uses
- Capital budgeting
- Business valuation inputs
- Financing comparisons
Common Search Questions About Cost of Capital Calculator
How do I calculate this?
Estimate weighted average cost of capital (WACC) from debt, equity, their costs and a tax rate.
What formula does this calculator use?
WACC = E/(D+E) × Re + D/(D+E) × Rd × (1 − tax rate).
How can I get the result quickly?
Enter the required values and select Calculate. The rebuilt mobile interface brings the result into view instead of leaving it far below the form.
Important Limitations
WACC depends heavily on market values and appropriate required-return assumptions. This calculator does not provide investment advice.
Frequently Asked Questions
Does the calculator upload my inputs?
No. The calculation runs in the browser and does not require an account.
Can I calculate again with different values?
Yes. Change any input and calculate again to compare scenarios.
Should I verify important results?
Yes. For high-impact financial, legal, health, engineering or contractual decisions, compare calculator output with current source information and appropriate professional guidance.