WACC Calculator
Calculate the weighted average cost of capital, the discount rate a business should use.
Every figure below is labelled in the currency you pick. Amounts are not converted — enter values in the same currency.
WACC is a hurdle, not a target
A project returning less than WACC destroys value even if it is profitable in accounting terms, because the capital could have earned more elsewhere at the same risk. The tax shield makes debt look cheap, but loading up on it raises the cost of equity as shareholders price in the extra risk — which is why WACC does not fall indefinitely as debt rises.
The formula
WACC = (E/V)·Re + (D/V)·Rd·(1 − tax)
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the WACC Calculator
- Fill in each field with your own figures — the defaults are only there as an example.
- The result updates as you type, so there is no button to press.
- Check the breakdown under the main result for the supporting numbers.
- Use the copy button to take the result with you, or share the link to reload the same inputs.
WACC Calculator — frequently asked questions
Is this wacc calculator free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
Can I use it on my phone?
Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the wacc calculator.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 23, 2026 · Calculation runs client-side · No data collected · Report an error