basic

Put-Call Parity Bound from Call (or Put) Calculator

P = C − S + K · e^(−r · T) — and inverse for C from P.

Use put-call parity to derive one European-option price from the other on the same underlying with the same strike K and expiry T. Given a call price C, P = C − S + K · e^(−r·T). Given a put price P, C = P + S − K · e^(−r·T). Reports both the implied P and the implied C plus the cash leg K · e^(−r·T).

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

$
$
%
yr
$
$

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

P + S = C + K · e^(−rT).

In depth

Use put-call parity to derive one European-option price from the other on the same underlying with the same strike K and expiry T. Given a call price C, P = C − S + K · e^(−r·T). Given a put price P, C = P + S − K · e^(−r·T). Reports both the implied P and the implied C plus the cash leg K · e^(−r·T).