Free prop-trading calculators
Five free, no-signup calculators for the math that decides whether a prop challenge is worth taking. Each one shares a URL — paste it into Discord or a blog and the inputs come along. Embed any of them via ?embed=1.
Firm-rule drawdown calculator
Project the equity floor and breach distance under any of six prop firms' drawdown rules — before you start the challenge.
Firm-mode position sizing
Compute the largest lot size that satisfies both your risk-per-trade limit and the firm's drawdown buffer.
Payout estimator
Estimate your next payout date and after-split amount across funded firms with weekly, bi-weekly, or on-demand cycles.
Risk-of-ruin calculator
Probability your strategy busts the drawdown before it earns, given win-rate, R:R, risk-per-trade, and ruin-distance.
Prop firm vs self-funded cost
Total cost to pass a prop challenge (eval + likely resets) vs the lump-sum needed to trade the same capital yourself.
None of these calculators send your inputs to a server. Math runs entirely in your browser; the URL captures the inputs so you can share or bookmark a result.
Embed any calculator on your site
Every tool here supports ?embed=1 as an iframe source. Use the embed snippet page to copy a ready-to-paste iframe for any of the five calculators — no signup, no licence, attribution is a small “Powered by Glitch Executor” link at the bottom of the embed.
Pair with the firm rule pages
FAQ
- Are these prop-firm calculators free?
- Yes. Every calculator runs entirely in the browser, requires no signup, and has no usage caps. Inputs are encoded into the URL so a single share-link captures the full calculation.
- Can I embed these calculators on my blog or Discord?
- Yes. Append ?embed=1 to any calculator URL and use it as an iframe src. The embed strips the marketing chrome and adds a small "Powered by Glitch Executor" credit linking back to the canonical page.
- Which calculator should I start with for a new prop firm challenge?
- Start with the firm-rule drawdown calculator. It tells you the exact equity level the firm will close you out at — the most expensive number to get wrong. Then use firm-mode position sizing to size each trade against that floor.
- Do the calculators reflect the firm rules I will actually face?
- They use the rule values from this repo's firm-rule registry, which is reviewed quarterly. Firms change pricing and rules frequently, so verify against the firm's own terms page before funding.
Last reviewed .