Reviewed · how we check firm rules
No signup, no email, no account
Free prop firm tools
Six calculators that answer the questions a challenge actually asks: how much size fits inside the risk, how much of today's budget is left, where the closure floor sits, how long the target takes, and what the payout is worth after the split. Every one runs in the browser — nothing you type is sent anywhere.
The calculators
| Tool | The question it answers | Use it when |
|---|---|---|
| Position size calculator | How many lots risk exactly 1% with this stop? | Before every entry, regardless of conviction |
| Daily drawdown calculator | How much of today's loss limit is left? | After a losing trade, and again at the open |
| Maximum loss calculator | Where is the floor, and has it risen with the peak? | On any trailing-drawdown account |
| Profit target planner | How many days does the target take at my pace? | When planning the calendar, before paying a fee |
| Rule checklist generator | What are this plan's limits in cash? | Before buying an evaluation at a firm you have not used |
| Profit and payout calculator | What is the target worth after the split and the fee? | When comparing account sizes and plans |
Why these exist
Most prop firm failures are not strategy failures. They are arithmetic failures: a position sized by habit rather than by stop distance, a daily budget spent by lunchtime, a trailing floor that rose while the trader was celebrating a new high. Each of those is a calculation, and each calculation has one right answer.
The tools here are deliberately narrow. They do not forecast, score or recommend. They take the numbers from your account and the plan document and return the figure that decides whether the next trade is inside the rules.
They are also free in a way that matters: no email gate, no trial, no account to cancel. A calculator that asks for an address before it divides two numbers is a lead form, and the numbers are usually the same arithmetic that appears in the guides anyway.
How to use them in order
- Generate the checklist for the plan and size you are buying, so the limits are in cash rather than percentages.
- Plan the target against the minimum trading days, which tells you the daily pace the evaluation actually requires.
- Size each trade from the stop distance and a third of the daily budget — never from a lot size you like.
- Check the budget after every loss, and stop the day at eighty percent spent.
- Track the floor on trailing accounts, because profit there is not the same as safety.
Each step takes under a minute, and together they answer the two questions that decide an evaluation: is this trade inside the rules, and is this evaluation viable at the account size I bought. Both answers are arithmetic, and both are usually guessed at instead.
What the tools cannot do
They cannot tell you which convention your firm uses for a given rule — that is in the plan document, and it is the sentence worth reading twice. They cannot confirm whether a figure is current; firms revise targets and drawdown models without notice. And they cannot tell you whether your firm permits a third-party trader on the account, which is the question that matters most before buying a passing service rather than a calculator.
Where a figure is quoted from a firm, it is linked and dated. The method page explains what that date promises, the rules matrix holds the numbers side by side, and the eight rules that end challenges explain the mechanics behind each column.
One limitation is worth stating plainly: a calculator cannot make a bad plan good. If an evaluation requires 3% a day to finish inside the calendar and the daily limit is 5%, no amount of accurate sizing changes the fact that the plan is one bad session from failure. The tools are most useful for finding that out before the fee is paid rather than after.
Frequently asked
Are the tools free?
Yes, all six, with no account, no email and no limit on use. They run entirely in the browser, so nothing is stored or transmitted.
Do they work on mobile?
Yes. The inputs and results are laid out for a phone screen, which is where most of these calculations get done during a session anyway.
Do the calculators cover futures accounts?
Position size does, if you enter the tick value instead of the pip value and the stop in ticks. The checklist generator names the futures plans we have confirmed figures for and marks the rest as unconfirmed rather than inventing a schedule.
Can I use them for a funded account, not just an evaluation?
Yes — the daily limit and maximum loss maths are identical, and the funded phase usually has the same limits with more at stake. Most traders should halve the per-trade risk once funded.