About TraderCalcs.io

TraderCalcs.io publishes 123 calculators across eleven areas: trading, funded-account challenges, futures, options, trading costs, forex, cryptocurrency, technical analysis, performance and risk, shares and investing. Each one takes figures you enter, applies a documented formula, and shows the result along with the arithmetic behind it.

Alongside them is the Desk: a trade journal, your own broker’s specifications saved once and reused everywhere, and a view of the trading day measured against limits you set. The journal turns the review calculators — expectancy, profit factor, win rate, R multiples, drawdown — from tools that ask you to type in summary figures into ones that read your own record. It is stored in your browser and nowhere else, and exports to CSV and PDF so the record stays yours.

Every calculator is free, requires no account, and works immediately. Results are never held back behind an email form. The calculations run entirely in your browser — nothing you type is sent to a server. A theme choice, or an account size you ask the site to remember, is saved in your own browser and nowhere else.

This is not an advice service, a signal service, or a brokerage. TraderCalcs.io does not provide trading signals, price forecasts, investment recommendations or personalised financial advice, and nothing on the site should be read as a suggestion to buy, sell or hold anything.

The calculators describe arithmetic relationships between numbers you supply. A position size calculator tells you what size makes a stop-out cost 1% of your account; it has no view on whether the trade is a good idea. That distinction runs through every tool here, and the wording on each page is chosen to maintain it. See the disclaimer for the full position.

The tools assume you already know what you are trying to calculate and want it done accurately, with the method visible. Each page documents its formula, defines every term, works through an example with real numbers, and states what the calculation leaves out — spread, commission, slippage, tax, or whatever else applies.

Formulas are standard financial mathematics, not invented for this site. Each one is implemented as a pure function, separated from the interface, and covered by automated tests including zero values, negative values, boundary conditions and decimal inputs. The methodology page sets out that process in detail.

Corrections, questions and requests for new calculators are welcome. Get in touch via the contact page.