WACC Calculator for Students
Use this free WACC calculator to work out the weighted average cost of capital for a finance assignment in seconds — with a built-in CAPM helper, full step-by-step working you can paste into your coursework, and a sensitivity check that shows how your answer moves when the inputs change.
Most WACC calculators online are built for analysts and CFOs: you type in a few numbers and get a single figure with no explanation. This one is built for students. It does not just hand you a number — it shows the full method, flags the input mistakes that lose marks, and lets you see your result as a range rather than a single point. Enter your figures below to begin.
📊 Your Inputs
Use market values for equity & debt where possible — hover the ? on each field for guidance.
What This WACC Calculator Does
The weighted average cost of capital blends the cost of equity and the after-tax cost of debt, weighted by how much of each a company uses to fund itself. Getting the formula right is the easy part; the marks are in the inputs. This WACC calculator handles the parts students get wrong:
- Built-in CAPM helper — no cost of equity figure? Enter the risk-free rate, beta and market risk premium and the calculator derives it for you.
- Mistake warnings — it flags the common errors as you type: a zero tax rate that ignores the tax shield, debt and equity costs entered the wrong way round, or a capital structure that looks like a unit mismatch.
- Full worked solution — every step is shown and substituted in full, ready to copy straight into your assignment so you earn method marks.
- Sensitivity check — see how your WACC shifts if your cost-of-equity estimate is off, so you can discuss your result as a range, exactly as markers expect.
How to Use the Calculator
Enter the market value of equity and debt, your cost of equity (or switch to the CAPM tab to calculate it), the pre-tax cost of debt and the corporate tax rate. The calculator returns your WACC, a visual capital-structure split, the full working, and a sensitivity table. Use market values rather than book values for the weights wherever you can — hover the help icon on any field for guidance.
Want the full method explained before you calculate? Read our complete step-by-step guide to calculating WACC for a finance assignment, which walks through the formula, CAPM, the after-tax cost of debt and a full worked example. If you would rather have the whole calculation and interpretation handled for you, our finance assignment help service can deliver it to your deadline.
Stuck on More Than Just the Number?
Getting the WACC figure is the easy part — justifying your assumptions and linking it to valuation is where marks are won and lost. Our finance experts can structure, write and check your assignment to your university's marking criteria.
Get Finance Assignment Help →