Free tools
Trading calculators
Size every trade to a fixed risk, check your reward-to-risk before you place an order, and model how a given set of assumptions compounds. Free, instant, and no account needed.
Risk / Reward + Position Size
Check the reward-to-risk of a setup from your entry, stop and target — then size the position to a fixed account risk. The ratio shown is arithmetic from the levels you enter, not a recommendation.
Reward : Risk is how many times your risk the target pays. The higher it is, the fewer wins you need to come out ahead.
- Risk = distance from entry to stop. Reward = distance from entry to target.
- A 2:1 setup only needs a 33% win rate to break even; 3:1 needs just 25%.
- Position sizing then risks a fixed % of the account per trade so one loss never does outsized damage.
Target $ risk
$100.00
Risk (20 shares)
$100.00
Reward (20 shares)
$200.00
Notional value
$2,000
Reward:Risk = |target − entry| ÷ |entry − stop|. Break-even win rate = 1 / (1 + R).
Recommended size = ⌊(account × risk%) ÷ (stop distance × multiplier)⌋ — the count that loses exactly your target if stopped out.
Risk a fixed % every time
Enter your account size and risk percentage and get the exact share or contract count that keeps each loss the same size — the foundation of consistent risk management.
Know your R:R first
A live price ladder shows risk and reward zones from your entry, stop, and target — so you can see the reward-to-risk ratio implied by the levels you enter.
See the compounding
Model how a hypothetical per-trade return compounds over a series — an arithmetic illustration, not a forecast of results.
These are the same calculators built into Ledger of Alpha — where they connect to your real trade history, journal, and analytics. See the full product
Put these numbers to work
Create a free account to log the trades you size here alongside the rest of your record.