WACC Calculator
Weighted Average Cost of Capital
Working out weighted Average Cost of Capital is easier with WACC Calculator — a free tool that does the math for you. Fill in Market Value of Equity ($), Market Value of Debt ($) and Cost of Equity (%) and read your answer immediately. You get a clean, precise output with the full working shown, so you can verify every step. Use it whenever you need a reliable number without opening a spreadsheet. Your inputs never leave your device: the calculation is fully client-side, and optional analytics/advertising only activate with your consent. Searching for wacc calculator weighted average cost of capital or a quick estimate? This tool covers it — free, fast, and private. Give WACC Calculator a try — it takes seconds and costs nothing.
What does the page calculator do?
WACC Calculator works out the wacc from the Market Value of Equity, Market Value of Debt, and Cost of Equity, following standard Finance conventions — the page defaults produce a wacc of 9.64%.
- Inputs: Market Value of Equity, Market Value of Debt, and Cost of Equity.
- Output: the wacc, plus the intermediate steps behind it.
- Method: the standard Finance formula, evaluated entirely in your browser.
Quick answer
With the default inputs (market value of equity of 5,000,000, market value of debt of 2,000,000, cost of equity of 12), wacc calculator returns a wacc of 9.64%. Assumptions and limits are summarized below.
How does the WACC Calculator work?
WACC Calculator computes the wacc directly from your inputs — the Market Value of Equity, Market Value of Debt, and Cost of Equity feed the formula. Nothing is uploaded: the math runs locally in your browser and the result appears as you type.
How it works
Every run of WACC Calculator evaluates the Market Value of Equity, Market Value of Debt, and Cost of Equity you enter, applies the standard Finance formula, and reports the wacc with each step listed for review.
Using the WACC Calculator
- Market Value of Equity — used in the first stage of the calculation, so entering it accurately matters more than any later refinement.
- Market Value of Debt — the value that feeds directly into the formula — match it to the scenario you are modeling before moving on.
- Cost of Equity — a core input the formula applies directly — keep the units consistent with the label.
- Read the result. The wacc appears immediately, with the step-by-step working underneath so you can verify every number.
- Iterate. Vary the inputs one at a time; the movement in the output shows which lever matters most for your wacc question.
The formula behind the result
WACC Calculator lists every intermediate step in the result panel, so the derivation of the wacc can be checked line by line.
Worked example: with market value of equity of 5,000,000, market value of debt of 2,000,000, cost of equity of 12, this wacc calculation returns WACC: 9.64%. The same run reports After-tax cost of debt: 3.75%.
The steps it follows:
- Total value = $5,000,000 + $2,000,000 = $7,000,000
- wE = 71.4%, wD = 28.6%
- After-tax debt cost = 5% × (1−25%) = 3.75%
- WACC = 0.7143 × 12% + 0.2857 × 3.75%
Substitute your own values and the same steps produce your answer — that is the point of a calculator that shows its working.
Understanding the result
To interpret the result from wacc calculator, read it together with the intermediate figures — the pairing is what makes the number auditable.
Where it helps
Common scenarios for WACC Calculator: planning ahead, comparing scenarios side by side, and double-checking a figure before acting on it. The step list makes it equally useful for learning the method and for double-checking someone else's numbers.
Common mistakes
Mixing up inputs with similar labels is the classic wacc mistake; the steps panel is the quickest way to spot a value that landed in the wrong field.
Tip: Run WACC Calculator twice with deliberately low and high inputs; the spread tells you how sensitive the output is, which a single run never shows.
Assumptions and limitations
The model behind WACC Calculator covers the standard case; special cases, edge values, or jurisdiction-specific rules may need manual adjustment.
Why use this calculator
Because the page doubles as documentation: WACC Calculator puts the formula, a worked example, and the assumptions right beside the calculator.
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Frequently Asked Questions
What does the tool calculate?
At its core, WACC Calculator takes the Market Value of Equity, Market Value of Debt, and Cost of Equity and evaluates the standard formula step by step, so the figure can be checked rather than trusted on faith. Because the working is visible: WACC Calculator shows each operation behind the wacc in the steps panel, so you can verify the result instead of trusting a black box.
How is the result calculated?
The first steps are total value = $5,000,000 + $2,000,000 = $7,000,000, then we = 71.4%, wd = 28.6%. WACC Calculator lists every intermediate step in the result panel, so the derivation of the result can be checked line by line.
What do I need to use the WACC Calculator?
The Market Value of Equity, Market Value of Debt, and Cost of Equity it asks for, or the page defaults if you just want to see the calculation work. Each input maps directly to the formula, and changing any one of them recalculates the wacc instantly.
What does the result from the tool mean?
The main number the wacc calculator returns is the wacc for your exact inputs, and the supporting figures and step list give it context. The wacc is only as complete as the inputs: anything the page does not ask for (fees, variability, local rules) sits outside the calculation.
When is the page most useful?
WACC Calculator fits planning and checking: planning ahead, comparing scenarios side by side, and double-checking a figure before acting on it, or any moment when the wacc needs to be right the first time. On this page, wacc calculator applies the standard Finance method to your inputs and lists every step of the working beside the result.