Bankroll Calculator
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RTP
Calculator.
RTP Calculator: What does an RTP figure actually mean for my money over a session? Enter three figures and this page returns expected return over the session, with every line of the arithmetic printed rather than hidden. The worked example below answers 480.00 for the figures it states. Free to embed. Checked 2026-08-23.
Run it on your numbers480.00
01Run it on
Run it on
your numbers.
The fields open holding the worked example below, and the answer changes as you change them. Every line of the arithmetic is printed under the result, and the formula under that — so the answer can be checked rather than trusted.
Expected return over the session480.00The arithmetic,
The arithmetic,
line by line.
| Step | Value |
|---|---|
| Total staked — 0.50 × 1,000 rounds | 500.00 |
| Expected return at 96.00% | 480.00 |
| Expected loss over the session | 20.00 |
| Expected loss as a multiple of one round's stake | 40.0× |
total staked = stake × rounds expected return = total staked × RTP ÷ 100 expected loss = total staked − expected return
02The worked example,
The worked example,
in plain HTML.
| Input | Value | What it is |
|---|---|---|
| Published RTP | 96% | From the studio's own specification sheet. A casino lobby tile is not a source for this figure. |
| Stake per round | 0.5 | Any currency or coin; the answer comes back in the same unit. |
| Rounds in the session | 1000 | A thousand spins is roughly two hours of unhurried play, and well under one hour on autoplay. |
| Expected return over the session | 480.00 | Computed by the same function the calculator above runs. The build refuses to publish this page if the two disagree. |
A thousand spins at 0.5 puts 500 through the game, not 0.5. At a published 96% the expected return on that turnover is 480 and the expected loss is 20 — forty times the stake that felt like the risk. RTP is a percentage of everything staked, and everything staked is the figure a session hides.
WHAT THIS CANNOT TELL YOUWhere the answer
Where the answer
stops being one.
Every calculator on this site ends here, because the number at the top is only as good as what it leaves out — and what it leaves out is never nothing.
| Limit | What it means |
|---|---|
| What this cannot see | Expected return is an average across an enormous number of rounds; a thousand is not enough for it to describe your outcome, and on a high-volatility title it is nowhere near enough. The figure also assumes every round runs at the RTP you entered, which fails the moment a bonus round, a feature buy, a side bet or a different configuration is involved. Where a studio publishes several RTP settings for one title, the operator chooses which one is live and rarely says so. |
| What it is not | Arithmetic, not advice. Nothing on this page recommends gambling, gambling more, or taking any particular bet, and no calculator turns a negative expectation into a positive one. |
03Put this on
Put this on
your own site.
Free, no account, no charge and no script of ours on your page. The snippet loads the calculator on its own in an inert frame, and keeps an attribution link outside it in your markup.
05Questions about
Questions about
this calculator.
What does an RTP figure actually mean for my money over a session?
A thousand spins at 0.5 puts 500 through the game, not 0.5. At a published 96% the expected return on that turnover is 480 and the expected loss is 20 — forty times the stake that felt like the risk. RTP is a percentage of everything staked, and everything staked is the figure a session hides.
What can the rtp calculator not tell me?
Expected return is an average across an enormous number of rounds; a thousand is not enough for it to describe your outcome, and on a high-volatility title it is nowhere near enough. The figure also assumes every round runs at the RTP you entered, which fails the moment a bonus round, a feature buy, a side bet or a different configuration is involved. Where a studio publishes several RTP settings for one title, the operator chooses which one is live and rarely says so.
Is the rtp calculator free to use and embed?
Yes. There is no account, no sign-up and no charge, the page works with JavaScript switched off, and the embed snippet on this page may be pasted into any site. The only thing asked in return is that the attribution link outside the frame is left in place.
Where this arithmetic comes from, and what it is worth.
The formula is printed in full on this page so it can be checked rather than taken. Solaspins asserts no figure of its own here: every number is either one you typed or one derived from it, and the worked example is generated by the same function the form runs. Last checked 2026-08-23. This is arithmetic — not financial, legal or gambling advice.