Direct answer
Pip value is the monetary value (in your account currency) of a one–pip price movement for a specific traded instrument and position size. For a JPY-quoted FX pair, the key steps are: (1) define what “one pip” means for that pair, (2) compute the pip move in price-terms for your trade size, and (3) convert that result into your account currency using the relevant exchange rate conventions.
Because different providers and contract specifications can define “pip” formatting and contract size details differently, you should treat pip value as a calculation framework with explicit assumptions rather than a universal number.
Mechanism or definition
A “pip” is a standardized price increment used for FX quoting. In many FX markets, pairs are quoted with different decimal precision; JPY-related pairs are commonly quoted to two decimal places, so a “pip” is often treated as a move of 0.01 in the quoted price (that is, the second decimal place).
To calculate pip value, start from the instrument structure:
- Base currency: the first currency in the pair (e.g., in JPY pair notation, this is the non-quote currency).
- Quote currency: the second currency (e.g., JPY when the pair ends with JPY).
- Price: how many quote-currency units correspond to one base-currency unit.
- Position size: the trade amount expressed in base-currency units (often described as lots, where a “standard lot” is commonly associated with a fixed base-currency notional, but exact contract terms can vary by provider).
A simple model separates the calculation into two stages:
- Pip move in quote terms (how much quote currency changes when price moves by one pip).
- Conversion into account currency (if your account currency is not the quote currency).
Stage 1: pip move in quote terms
Assume the pip size in price terms is ΔP. For a JPY-quoted pair under the common convention, you might use ΔP = 0.01.
If you hold N units of base currency, and the pair price is (base/quote) in the common FX sense, then a one-pip move produces an approximate change in quote-currency value of:
PipValue_in_quote ≈ N × ΔP
This expression is the “mechanics core” only when the way your position notional maps to base units is consistent with the model (i.e., your position size is truly denominated in base units, and the pair’s pricing convention matches the ΔP you selected).
Stage 2: convert pip value to account currency
If your account currency equals the quote currency, then:
- PipValue_in_account = PipValue_in_quote
If not, you convert using an FX rate that links the quote currency to your account currency. A generic conversion approach is:
PipValue_in_account ≈ PipValue_in_quote × (Rate_quote_to_account)
Where Rate_quote_to_account is the number of account-currency units per one unit of quote currency (or the inverse, depending on which direction your quote is expressed). The main failure mode is using a rate direction incorrectly.
Evidence or example (with explicit assumptions)
Below is a worked template that you can adapt. No live prices are used; it is purely arithmetic.
Example A: account currency equals JPY (common for JPY-referenced accounts)
Assumptions:
- Pair is quoted with JPY as quote currency.
- One pip = 0.01 in price terms.
- Position size N is base-currency units, consistent with the Stage 1 model.
- Your account currency is JPY.
Then:
- PipValue_in_quote ≈ N × 0.01
- Because the account currency is the quote currency (JPY): PipValue_in_account = N × 0.01
You can verify reasonableness by checking units: multiplying “base units” by a “price increment (quote per base unit)” yields “quote currency units.”
Example B: account currency differs from JPY
Assumptions:
- Same pip convention: ΔP = 0.01.
- Pip move in quote terms: PipValue_in_quote ≈ N × 0.01.
- Your account currency is not JPY.
- You have a conversion factor Rate_JPY_to_ACC meaning “ACC per 1 JPY.”
Then:
- PipValue_in_account ≈ (N × 0.01) × Rate_JPY_to_ACC
If your available market data expresses the conversion rate as “JPY per 1 ACC” instead, you must invert it. This is a common calculation mistake.
Limitations and risks (what can fail)
- Pip definition can be convention-dependent. While JPY pairs are often quoted with two decimals, the “one pip” increment you should use depends on the instrument’s quoting format and contract specification.