Put-Call Parity Calculator
Consistency check between call and put prices
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Working out consistency check between call and put prices is easier with Put-Call Parity Calculator, which answers as you type. Type Call Price ($), Put Price ($) and Strike ($) into Put-Call Parity; each keystroke re-runs the math. Nothing in Put-Call Parity is a black box. That makes Put-Call Parity handy for quick estimates anywhere. Put-Call Parity is privacy-first: Finance inputs stay offline. Put-Call Parity sits in the Finance section next to free online put-call parity calculator and put call parity calculator options arbitrage european options. Put-Call Parity is great for comparing scenarios. Change one value and watch. Try Put-Call Parity now and keep it handy.
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, using Finance conventions. With the defaults, put-call parity calculator gives 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 documented Finance method, with the parity gap derived on your own machine.
Quick answer
put-call parity calculator returns a parity gap of $-1.00 with the default inputs (call price of 5, put price of 4, strike of 100).
How does the Put-Call Parity Calculator work?
Put-Call Parity Calculator computes the parity gap directly from your inputs — the Call Price, Put Price, and Strike feed the formula. Your figures are processed in place, which is why the parity gap shows up instantly.
How it works
This page is a working put-call parity calculator: enter your values, read the parity gap, and follow the step list to see exactly how the answer was derived.
Using the Put-Call Parity Calculator
- Call Price — the Finance field that most often arrives from another document; re-check its scale.
- Put Price — read literally by the put-call parity formula, so a placeholder produces a placeholder answer.
- Strike — the field the rest of the put-call parity case hangs on; revisit it to move the parity gap.
- The parity gap on Put-Call Parity Calculator is labelled with its units, so read the label as carefully as the digits.
- If a value is uncertain, run the put-call parity calculator at both ends of its plausible range and treat the gap between the two result figures as your real uncertainty.
The formula behind the result
Nothing in the put-call parity engine memorises a previous answer — the formula re-evaluates the whole chain each time the Call Price, Put Price, and Strike change.
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
Understanding the result
On Put-Call Parity Calculator the figure is one line of a longer answer: the figures below it say what fed the number and how far it can be trusted.
Where it helps
Everyday work with Put-Call Parity Calculator looks like testing a number before it goes in writing, comparing scenarios side by side, and verifying a figure without opening a spreadsheet, and the page is written for exactly that kind of one-off question.
Common mistakes
Changing two inputs at once on the put-call parity page makes a surprising parity gap impossible to explain; one change per run keeps the cause visible.
Tip: Put-Call Parity Calculator returns Parity Gap: $-1.00 at its defaults; double the Call Price ($) and it returns Parity Gap: $4.00.
Assumptions and limitations
Put-Call Parity Calculator answers the arithmetic and stops there — it cannot tell whether the Call Price, Put Price, and Strike you supplied describe a realistic case.
Why use this calculator
Because the page doubles as documentation: Put-Call Parity Calculator puts the formula, a worked example, and the assumptions right beside the calculator.
Frequently Asked Questions
What does put-call parity calculator compute?
Strip away the layout and Put-Call Parity Calculator is one Finance relationship: put in Call Price, Put Price, and Strike, get out the result, with the substitution shown at every stage. Because there is nothing to install and nothing to configure — Put-Call Parity Calculator loads once, then recalculates the output on the device as you type.
Where does the parity gap come from?
The first steps are formula: c − p = s − k·e^(−rt), then pv of strike = 100 × e^(−0.0100) = 99.0050. Where the Finance definition splits into stages, Put-Call Parity Calculator keeps the stages separate so each one can be checked before the figure is accepted.
Does Put-Call Parity Calculator need anything besides its fields?
Only Call Price, Put Price, and Strike — with the parity gap following at once.
What happens if I double the Call Price ($)?
At the defaults Put-Call Parity Calculator returns Parity Gap: $-1.00; doubling Call Price ($) to 10 moves it to Parity Gap: $4.00.
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. Zero is treated as a real value throughout Put-Call Parity Calculator, so a field left at zero changes the output rather than being skipped.
When is the Put-Call Parity Calculator most useful?
The put-call parity calculation fits testing a number before it goes in writing, comparing scenarios side by side, and verifying a figure without opening a spreadsheet: routine enough to be repetitive, consequential enough to want the arithmetic shown. Keep one tab on Put-Call Parity Calculator while you compare quotes — switching inputs is faster than rebuilding the same calculation elsewhere.
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