Put-Call Parity Calculator
Check parity C − P = S − K·e^(−rT) on live quotes and quantify the arbitrage gap if it's violated.
Formula
Parity is model-free: it follows from no-arbitrage alone, so 'violations' on real screens almost always mean a dividend before expiry, hard-to-borrow stock, or one stale quote — each of which this gap quantifies.
Not financial advice — for informational and analytical use only. Verify all figures with a qualified professional before acting on them.
Need put-call parity calculator results fast? Analysts, founders, traders and finance professionals use the Put-Call Parity Calculator to skip the spreadsheet and get a defensible answer in one step — free, private and instant.
About Put-Call Parity Calculator
Check parity C − P = S − K·e^(−rT) on live quotes and quantify the arbitrage gap if it's violated. Parity is model-free: it follows from no-arbitrage alone, so 'violations' on real screens almost always mean a dividend before expiry, hard-to-borrow stock, or one stale quote — each of which this gap quantifies. The governing relationship is C − P = S − K·e^(−rT). The Put-Call Parity Calculator computes entirely in your browser — free, private (your figures never leave your device) and instant, recalculating live as you change any input.
How to use Put-Call Parity Calculator
- 1Enter Call price, Put price, Spot price, Strike, Risk-free rate (%), Days to expiry into the Put-Call Parity Calculator.
- 2The result is computed automatically using C − P = S − K·e^(−rT) — there is no button to press.
- 3Change any input to model a different scenario, then copy or share the result.
Why use Put-Call Parity Calculator?
- ✓Computes put-call parity calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter stay private
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
What is the formula behind the Put-Call Parity Calculator?+
Put-Call Parity Calculator uses C − P = S − K·e^(−rT). Parity is model-free: it follows from no-arbitrage alone, so 'violations' on real screens almost always mean a dividend before expiry, hard-to-borrow stock, or one stale quote — each of which this gap quantifies. The tool substitutes your actual inputs into this relationship and shows the worked example step by step.
What inputs does the Put-Call Parity Calculator need?+
Enter Call price, Put price, Spot price, Strike, Risk-free rate (%), Days to expiry and the result updates immediately — there is no button to press. Change any value to model a different scenario in real time.
Is the Put-Call Parity Calculator free, and is my data private?+
Yes — it is completely free with no sign-up or usage limit, and it runs entirely in your browser, so the numbers you enter are never uploaded or stored on any server. It is for informational and analytical use, not financial advice.
What is the Put-Call Parity Calculator based on?+
The method follows authoritative sources: Stoll (1969) — the relationship between put and call prices. The formula and references are shown on the page so you can verify and cite the result.
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