Forex Lot Size Calculator

Use this forex lot size calculator to convert account risk and stop-loss pips into standard lots, mini lots, micro lots, and units before placing a trade.

Best for

Forex traders who size positions from account risk, stop-loss pips, and pair-specific pip value.

What you get

Standard lots, mini lots, micro lots, units, planned dollar risk, and pip risk.

Not for

Replacing broker margin checks, spread checks, or live conversion rates.

Formula

Lots = account risk amount / (stop-loss pips x pip value per lot)

Example

A $10,000 account risking 1% with a 25 pip stop and $10 pip value risks $100 and uses 0.40 standard lots.

Hexaplan verdict

Use this before every forex trade where stop distance changes.

Forex lot size formula

Lot size equals account risk amount divided by stop-loss pips times pip value per standard lot.

Forex lot size example

If you risk $100 with a 25 pip stop and each standard-lot pip is worth $10, the position size is 0.40 standard lots.

Common lot size mistakes

Sizing by feeling instead of risk.
Forgetting spread.
Using standard-lot pip value on mini or micro lots.
Ignoring account currency conversion.

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FAQ

What is a standard lot?

A standard lot is usually 100,000 units of the base currency.

Can I use this for gold or indices?

Use broker-specific contract values for gold, indices, or CFDs because pip values can differ.