Three calculators live at propfy.io/tools. No sign-up, no email, nothing saved. They do the arithmetic that decides whether a prop firm account survives.
Trailing drawdown calculator
Answers three things at once: where your floor sits today, how much room is left before the account closes, and the balance at which the floor stops following you.
You pick a firm and account from the list, then enter your current balance and the peak the program measures from. The peak field is labelled in that program's own terms, because programs do not all measure the same thing.
Daily loss limit position sizer
Turns a dollar risk and a stop distance into a contract count that still respects your cap for the day.
Inputs: the instrument, the account and its daily loss limit, the stop distance in points or ticks, the dollars you are willing to risk on this trade, and what you have lost so far today. The result is a contract count, the dollars actually at risk at that count, and the room left in the day.
Twelve contracts are built in, each micro beside the mini it tracks: Nasdaq, S&P 500, Russell 2000, Dow, gold and WTI crude. Anything else is covered by an "enter your own" row where you type what one point and one tick are worth.
Evaluation cost comparison
Weighs the evaluation fee, the activation fee and any published reset cost against the time it takes to reach the profit target.
You enter an account size, the profit you make on an average trading day, and how many days a month you trade. The table gives you, per plan, the evaluation fee, the profit target, the time to reach it, the total cost and the cost per $1,000 of account size.
Only standard published prices are used. A standard price is the one still true next week, which is the only kind worth planning against.
Where the account sizes come from
Each calculator carries the account sizes whose figures the firm publishes on a page the tool can link to. Every figure is read off that page, never inferred and never carried from memory, and each one shows the date it was last read beside a link to its source. Published figures change without notice, so check the source before you rely on a number.
Rules are paraphrased rather than copied. Firm names appear because those are the programs the figures belong to, and for no other reason. Where a program is not in a list, use the "enter my own" row and type your own figures.
What they are not
They are calculators, not a rulebook. Your firm's own published rules are the authority on your account, and the source link beside each figure is there so you can go and read them.