What pip value means (definition before the calculation)
Pip value is the monetary change you expect from a one-pip move in a specific currency pair. A “pip” is a standardized price step, but the exact pip size depends on the quoting convention for that pair.
To calculate pip value, you need:
- Pair pip size (the price increment called “1 pip”).
- Position size (commonly expressed as contract units, e.g., 1 lot = a fixed base currency amount, depending on the market/provider).
- Whether you measure value in the pair’s quote currency or your account currency.
- If your account currency differs, an FX conversion rate from the pip value currency to your account currency.
This article focuses on the two pairs in the question: GBP/USD and GBP/JPY.
Direct formulas for pip value mechanics
Step 1: Identify the pip size
A common convention is:
- For pairs quoted like X/USD (for example GBP/USD), 1 pip = 0.0001 of the quoted price.
- For JPY-quoted pairs (for example GBP/JPY), 1 pip = 0.01 of the quoted price.
These are conventions used widely, but pip definitions can vary by provider and instrument. When calculating independently, confirm the instrument’s pip definition in the platform documentation.
Step 2: Start with pip value in the quote currency
Think of a pip move as a change in the quote currency per unit of base currency.
Let:
- P = pair price (e.g., GBP/USD or GBP/JPY)
- pip = pip size in price units (0.0001 for GBP/USD; 0.01 for GBP/JPY, under the common convention)
- N = position size in base units (how many GBP you control)
Then:
-
For GBP/USD, the quote currency is USD. A one-pip move changes price by
pip, so the value in USD is:- pip_value_USD = N × pip
-
For GBP/JPY, the quote currency is JPY. A one-pip move changes price by
pip, so the value in JPY is:- pip_value_JPY = N × pip
Notice how the pair price P does not appear in these “quote-currency” formulas under this simplified setup, because we assume the pip move directly represents a fixed quote-currency increment per base unit.
Step 3: Convert to account currency if needed
If your account currency is the same as the pair’s quote currency, you can use the quote-currency pip value directly.
If not, you convert.
General rule:
- If you have pip value in USD and need it in EUR, you multiply by an FX rate that converts USD to EUR.
- If you have pip value in JPY and need it in GBP, you convert JPY to GBP using an appropriate rate.
Because the exact conversion depends on which direction the conversion rate is quoted, use this consistent approach:
- Convert using the rate that turns “1 unit of the pip currency” into “units of your account currency.”
Evidence-or-example style walkthroughs (with explicit assumptions)
Example A: GBP/USD pip value in USD
Assumptions (example-only):
- Account currency: USD
- Position size: N GBP
- Pip size for GBP/USD: 0.0001
Using the quote-currency formula:
- pip_value_USD = N × 0.0001
So a one-pip move changes the USD value by a fixed amount proportional to your GBP units.
Example B: GBP/JPY pip value in JPY
Assumptions (example-only):
- Account currency: JPY
- Position size: N GBP
- Pip size for GBP/JPY: 0.01
Using the quote-currency formula:
- pip_value_JPY = N × 0.01
The difference from GBP/USD comes mainly from the pip size convention (0.01 vs 0.0001).
Example C: Converting when your account currency differs
Suppose your account currency is neither USD nor JPY.
- If you calculate pip_value_USD from GBP/USD, then convert USD to your account currency using an FX rate consistent with your platform’s quoting.
- If you calculate pip_value_JPY from GBP/JPY, then convert JPY to your account currency similarly.
Material point: conversion requires a chosen rate. In practice, different execution times and spread/fees affect the real cash outcome, but the conversion step concept stays the same.
Limitations and common failure modes
Pip definition may not match assumptions
If your platform defines “pip” differently (for example, different decimal precision or alternative tick sizing), then the pip size (0.0001 vs 0.01) will be different and pip value will change accordingly.