Put-Call Parity Calculator
Consistency check between call and put prices
Put-Call Parity Calculator is a free online calculator that helps you consistency check between call and put prices. Type in Call Price ($), Put Price ($) and Strike ($) — the calculator recalculates live with every keystroke. The calculation is displayed with all its working, so the number always makes sense. It is handy for quick estimates at work, at home, or on the go. No sign-up, no server storage — the math happens right on your device, and most tools work offline after the first visit. Searching for put call parity calculator options arbitrage european options or free online put-call parity calculator? This tool covers it — free, fast, and private. Bookmark it and the answer is always one click away.
What does the Put-Call Parity Calculator do?
Put-Call Parity Calculator works out the parity gap from the Call Price, Put Price, and Strike, following standard Finance conventions — the page defaults produce a parity gap of $-1.00.
- Inputs: Call Price, Put Price, and Strike.
- Output: the parity gap, plus the intermediate steps behind it.
- Method: the standard Finance formula, evaluated entirely in your browser.
Quick answer
With the default inputs (call price of 5, put price of 4, strike of 100), put-call parity calculator returns a parity gap of $-1.00. Assumptions and limits are summarized below.
How does it work?
Put-Call Parity Calculator computes the parity gap directly from your inputs — the Call Price, Put Price, and Strike feed the formula. Nothing is uploaded: the math runs locally in your browser and the result appears as you type.
How it works
At its core, Put-Call Parity Calculator takes the Call Price, Put Price, and Strike and evaluates the standard formula step by step, so the parity gap can be checked rather than trusted on faith.
Using the Put-Call Parity Calculator
- Call Price — a core input the formula applies directly — keep the units consistent with the label.
- Put Price — one of the values the calculation builds from; the result reflects exactly what you type here.
- Strike — used in the first stage of the calculation, so entering it accurately matters more than any later refinement.
- Review the output. Beyond the headline parity gap, the intermediate steps are listed — useful for catching a mistyped input.
- Iterate. Vary the inputs one at a time; the movement in the result shows which lever matters most for your put-call parity question.
The formula behind the result
Put-Call Parity Calculator lists every intermediate step in the result panel, so the derivation of the parity gap can be checked line by line.
Worked example: with call price of 5, put price of 4, strike of 100, this put-call parity calculation returns Parity Gap: $-1.00. The same run reports PV(K) = $99.00 | A gap near zero means prices are consistent; a large gap signals an arbitrage opportunity or stale.
The steps it follows:
- Formula: C − P = S − K·e^(−rT)
- PV of strike = 100 × e^(−0.0100) = 99.0050
- C − P = 5 − 4 = 1.00
- S − PV(K) = 101 − 99.00 = 2.00
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 put-call parity calculator, read it together with the intermediate figures — the pairing is what makes the number auditable.
Where it helps
Typical uses for Put-Call Parity Calculator include short-term planning, comparing scenarios side by side, and double-checking the parity gap — anywhere the figure needs to be defensible rather than guessed.
Common mistakes
The most common error with Put-Call Parity Calculator is a unit mismatch — one value entered in different units than its label assumes quietly skews the parity gap. Check each label before typing.
Tip: If the parity gap looks wrong, read the steps panel before re-entering anything; it usually shows exactly where the number departed from expectation.
Assumptions and limitations
Put-Call Parity Calculator assumes the units shown in each label — entering values in different units will skew the parity gap proportionally.
Why use this calculator
Because the page doubles as documentation: Put-Call Parity Calculator puts the formula, a worked example, and the assumptions right beside the calculator.
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Frequently Asked Questions
What does the Put-Call Parity Calculator calculate?
Put-Call Parity Calculator keeps the whole calculation in front of you — the Call Price, Put Price, and Strike, the formula, the intermediate steps, and a worked example you can reproduce line by line. Because the working is visible: Put-Call Parity Calculator shows each operation behind the output in the steps panel, so you can verify the result instead of trusting a black box.
How is the parity gap calculated?
The first steps are formula: c − p = s − k·e^(−rt), then pv of strike = 100 × e^(−0.0100) = 99.0050. The calculation in Put-Call Parity Calculator applies the standard Finance method, keeping full precision internally and rounding only the final display.
What do I need to use the Put-Call Parity Calculator?
The Call Price, Put Price, and Strike 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 parity gap instantly.
What does the result from the Put-Call Parity Calculator mean?
The main number the put-call parity calculator returns is the parity gap for your exact inputs, and the supporting figures and step list give it context. The model behind Put-Call Parity Calculator covers the standard case; special cases, edge values, or jurisdiction-specific rules may need manual adjustment.
When is the Put-Call Parity Calculator most useful?
Common scenarios for Put-Call Parity Calculator: short-term planning, comparing scenarios side by side, and double-checking the parity gap. The step list makes it equally useful for learning the method and for double-checking someone else's numbers. Run Put-Call Parity Calculator twice with deliberately low and high inputs; the spread tells you how sensitive the output is, which a single run never shows.