Position Size Calculator
The same position-sizing math Bloomberg uses for €24K/year — free, no signup, runs in your browser. Handles stocks, futures, forex, and crypto with pip/tick-aware precision.
Inputs
Futures · contract size 25,000 · USD
Quick R:R presets
- ·Position size rounds to 0 — risk too small or stop too wide
How it works
How serious IBKR traders size positions
Define risk
Set your account size and the percentage of capital you're willing to lose on this trade. Most professional traders cap at 1-2% per position.
Mark levels
Enter your planned entry, stop loss, and (optionally) take profit. The calculator handles pip/tick math automatically per asset class.
Size the position
You get the exact shares, contracts, or lots — plus R:R ratio, notional exposure, and a visual risk profile across multiple scenarios.
More tools coming
This is just the beginning
When Fulcrum Quant launches, this calculator becomes the entry point to the full platform — synced with your real IBKR positions via Flex Web Service.