Free Trading Calculators

Three calculators that do one job each. Everything runs locally in your browser; nothing you type leaves your device.

• Position Size Calculator

  Convert a risk percentage into a number of units, given where your stop sits.

• Risk/Reward Calculator

  Turn an entry, a stop and a target into a ratio — and into the win rate that ratio would need to break even.

• Trading Fee Calculator

  Estimate what a round trip costs, and how far price must move before you are back to flat.