Forex Trading Calculators
Five calculators that share one data spine: the spread figures come from our own May to June 2026 8-pair measurement, exchange rates refresh daily and are dated on every result, and the leverage maths applies ASIC's retail caps rather than an offshore default.
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What will trading cost me?
One tool, built on our own spread measurements
Broker Cost Calculator
Your monthly trading cost across 32 ASIC-regulated brokers, ranked from our measured spreads rather than advertised ones. The same dataset drives our best forex brokers in Australia rankings.
- Needs
- pairs traded · trades per month · lot size
- Returns
- ranked monthly cost per broker, in AUD
Behind the ranking
- ASIC brokers costed
- 15
- Pairs measured
- 8
- Spread dataset
- May to June 2026
- Measured by
- Live accounts
How much should I risk?
Position sizing and margin, worked back from risk
-
Position Size Calculator
Lots to trade for your balance, risk and stop distance.
- Needs
- balance · risk % · stop pips
- Returns
- lots and units to trade
-
Margin Calculator
Margin a position ties up under ASIC's retail leverage caps, tier by tier.
- Needs
- pair · lots · leverage tier
- Returns
- required margin in AUD
What is the trade worth?
Pips, and profit or loss
-
Pip Value Calculator
What one pip is worth in your account currency. The figure the other calculators consume.
- Needs
- pair · lot size · account currency
- Returns
- pip value in AUD, USD or EUR
-
Profit / Loss Calculator
Profit or loss for an entry, exit and position size, long or short.
- Needs
- entry · exit · size · direction
- Returns
- result in account currency
Which calculator answers your question
The 5 tools split by the question asked, not by instrument. Start here if you know the question but not the tool:
- What will a month of trading cost me?
- The broker cost calculator, then the lowest spread and lowest commission guides for the brokers behind the ranking.
- How many lots should I trade?
- The position size calculator, which works back from a risk percentage and a stop distance rather than from a lot size.
- What is a pip worth on this pair?
- The pip value calculator. It is the figure the other four consume, so it is the one to check when a result looks wrong by a factor of ten.
- How much margin does this position tie up?
- The margin calculator, with the caps explained in our leverage guide and the mechanics in our margin guide.
- What would this trade have made or lost?
- The profit and loss calculator, worked through in full in our worked AUD trade example.
Where the figures come from
Every figure the tools output is traceable. Broker spreads and commissions render from the same dataset our best forex brokers in Australia rankings use, exchange rates carry their capture date (11 August 2026 at this build), and the margin tiers quote the ASIC Product Intervention Order directly. Where a number is missing, the tools say so instead of estimating; the capture method behind the spread data is documented on our methodology page.
- 15currency pairs on the shared spine
- 15ASIC brokers ranked in the raw cost view, of 32 covered
- 5account currencies: AUD, USD, GBP, EUR, NZD
- 30:1ASIC retail cap on major pairs, applied by the margin maths
- Spread dataset: May to June 2026
- FX rates: dated on every result
- Margin tiers: ASIC Product Intervention Order, as extended, verified against the Federal Register
Calculator questions, answered
Why do results differ from my broker's calculator?
Broker calculators use their own live feed and sometimes their own contract sizes. Ours use a dated mid rate and standard 100,000-unit lots, and state both, so small differences are expected and explainable.
Do the calculators work for MT4 and MT5 lot conventions?
Yes. Standard, mini and micro lots follow the 100,000, 10,000 and 1,000 unit conventions MT4 and MT5 use, and the position size tool shows the lots to trade, with units alongside them in the quick calculator above.
How current are the spread figures?
The cost calculator uses our May to June 2026 measurement across 8 pairs on live accounts. The capture window is stated on every result rather than implied.
Are these calculators free, and do they need an account?
All 5 are free with no sign-up. They run in the page, send nothing to a broker and are not connected to any trading account.