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House Edge
Calculator.
House Edge Calculator: What is the house edge on this game, and what does it cost me per hour? Enter three figures and this page returns house edge, with every line of the arithmetic printed rather than hidden. The worked example below answers 4.00% for the figures it states. Free to embed. Checked 2026-08-23.
Run it on your numbers4.00%
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.
House edge4.00%The arithmetic,
The arithmetic,
line by line.
| Step | Value |
|---|---|
| House edge — 100 − 96.00% | 4.00% |
| Expected cost per round | 0.04 |
| Expected cost per hour at 500 rounds | 20.00 |
| Total staked in that hour | 500.00 |
house edge = 100 − RTP cost per round = stake × house edge ÷ 100 cost per hour = cost per round × rounds per hour
02The worked example,
The worked example,
in plain HTML.
| Input | Value | What it is |
|---|---|---|
| Published RTP | 96% | The studio's own figure for the configuration the casino runs. One title often ships several; the operator picks. |
| Stake per round | 1 | Any currency or coin. The hourly figure comes out in the same unit. |
| Rounds per hour | 500 | Autoplay on a slot runs far faster than most people estimate. Time your own hundred spins rather than guessing. |
| House edge | 4.00% | Computed by the same function the calculator above runs. The build refuses to publish this page if the two disagree. |
A game published at 96% RTP keeps 4 units of every 100 staked. At 1 per spin and 500 spins an hour you stake 500 and expect to lose 20 of it — per hour, every hour, for as long as the session runs. The number people react to is not the 4%; it is the 500 staked, which is five times the amount most players would say they were risking.
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 | The edge is a long-run average of the game's own published mathematics, and it describes the game rather than your session: an hour can end well up or well down and neither outcome says the figure is wrong. It also assumes the operator runs the RTP configuration you entered. Many titles ship in several, the choice belongs to the casino, and few casinos publish which one is live — that is the single most important unknown on this page, and no calculator can resolve it. |
| 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 is the house edge on this game, and what does it cost me per hour?
A game published at 96% RTP keeps 4 units of every 100 staked. At 1 per spin and 500 spins an hour you stake 500 and expect to lose 20 of it — per hour, every hour, for as long as the session runs. The number people react to is not the 4%; it is the 500 staked, which is five times the amount most players would say they were risking.
What can the house edge calculator not tell me?
The edge is a long-run average of the game's own published mathematics, and it describes the game rather than your session: an hour can end well up or well down and neither outcome says the figure is wrong. It also assumes the operator runs the RTP configuration you entered. Many titles ship in several, the choice belongs to the casino, and few casinos publish which one is live — that is the single most important unknown on this page, and no calculator can resolve it.
Is the house edge 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.