Five working calculators covering the major currency pairs, the yen crosses and Gold. Everything runs in your browser — nothing is sent anywhere, and no sign-up is required.
These are planning tools, not a price feed. You supply the market price and your account details; the calculator does the arithmetic. Contract sizes and pip definitions vary between brokers — Gold in particular is quoted differently by different firms. Every calculator below shows the exact specification it is using, so check it against your own platform before you place a trade.
The most important calculation in trading, and the one most beginners skip. Rather than guessing a lot size, you decide what a losing trade may cost you, measure where the stop belongs, and let the arithmetic produce the size.
Why it decides everything: two traders can take the identical trade with the identical stop — one survives the losing streak, the other doesn’t. The only difference is size.
A pip on its own tells you nothing about money. Thirty pips might be three dollars or three hundred, depending entirely on your position size and the instrument. This converts movement into your account currency, so risk is always expressed in something real.
How it works: pip value in the quote currency is simply pip size × contract size × lots. If the quote currency isn’t your account currency, it then converts at the rate you supply.
Gold works differently. One standard lot of XAU/USD is 100 troy ounces, not 100,000 units. A $1.00 move in the gold price is therefore $100 per standard lot. We treat a gold pip as 0.01, which makes one pip worth $1.00 per lot — but some brokers define it as 0.10. The calculator shows you which it is using.
Enter a trade’s three prices and this returns the reward-to-risk ratio and — far more usefully — the win rate you would need for that ratio to break even over a long run of trades.
Why breakeven matters more than win rate: a strategy winning 40% of the time is strongly profitable at 3:1 and steadily loses money at 1:1. Win rate quoted on its own is close to meaningless.
| Reward : Risk | Breakeven win rate |
|---|---|
| 1 : 1 | 50.0% |
| 1.5 : 1 | 40.0% |
| 2 : 1 | 33.3% |
| 3 : 1 | 25.0% |
Before costs. Spread, commission and swap push every one of these figures higher in practice.
What a move is actually worth, before costs. Useful for sanity-checking a trade plan against your account, and for understanding how quickly a position at the wrong size can hurt.
What it excludes: spread, commission, and overnight swap. On short-term trades those costs can easily be a third of a modest winner, so treat the result as the ceiling rather than the expectation.
Gold routinely travels $20–$40 in a day. At one standard lot that is $2,000–$4,000 of account movement. Traders who size gold like a currency pair — where a big day might be 100 pips, or $1,000 a lot — are typically carrying several times the risk they think they are.
Margin is the deposit your broker holds against an open position. It is not the size of your risk — it is a fraction of a much larger exposure, and confusing the two is how accounts get closed out.
The number to watch is notional exposure. That, not your margin, is what a market move acts on.
High leverage lowers the margin required, which makes an oversized position feel affordable. The position still moves at its full notional size. Choose size from the risk calculation above, never from what your available margin permits.
Gold is the instrument where position-sizing mistakes are most expensive, because its contract specification is nothing like a currency pair’s.
One standard XAU/USD lot is 100 troy ounces. A mini lot is 10 oz and a micro lot 1 oz. Compare that with 100,000 units for a standard currency lot — the numbers are not comparable, and neither is the risk.
A $1.00 move in the gold price is worth $100 per standard lot, $10 per mini lot and $1 per micro lot. Using a 0.01 pip definition, one pip is $1.00 per standard lot.
Placing a 1-lot gold trade because 1 lot of EUR/USD felt manageable. Gold’s daily range is frequently $20–$40, so that position swings $2,000–$4,000 a day. On a $5,000 account, that is not a trade — it is a coin flip on the account.
The setup
Account balance: $10,000
Risk per trade: 1% = $100
Instrument: XAU/USD
Entry: 2,410.00
Stop-loss: 2,405.00
Stop distance: $5.00, or 500 pips at 0.01
The arithmetic
Value per $1.00 move, per lot = 100 oz × $1.00 = $100
Lots = risk ÷ (stop in dollars × value per dollar per lot)
= $100 ÷ ($5.00 × $100) = 0.20 lots
Check: 0.20 lots is 20 oz. A $5.00 adverse move × 20 oz = $100. Correct.
Take that same trade at 1.00 lot instead and the $5.00 stop costs $500 — five percent of the account on a single trade, from a stop that looked small on the chart.
No calculator here. Most journals record what happened; a useful one records what you were thinking, because that is the only part you can improve.
| Record | Why it matters |
|---|---|
| Date, instrument, direction | Lets you group results by instrument and session later, which is where patterns show up. |
| Reason for entry | Written before entering, not after. If you cannot put it in one sentence, you have an urge rather than a setup. |
| Entry, stop, target | All three defined before the position opens. A trade without a predefined stop is a hope. |
| Size and % risked | Exposes the most destructive pattern there is: quietly increasing size after a win, or to win back a loss. |
| Outcome in R | Results as multiples of risk. +2R and −1R compare across account sizes; currency amounts do not. |
| Did you follow the plan? | The single most valuable column. A losing trade that followed the plan is fine. A winner that broke it is a warning. |
| Emotional state | Bored, rushed, frustrated, overconfident. Patterns here usually explain patterns in the results column. |
| Review note | Written days later, not minutes. Distance produces better analysis than the moment after a close. |
Any single trade is noise. Look at 20–30 at a time and check whether your rule-following column correlates with your results column. It usually does, and that is the most useful thing a journal will ever tell you.
If any term on this page was unfamiliar, the education module covers each one properly and in order.
