This RTP calculator shows the arithmetic behind turnover, theoretical expected return, expected loss and house edge. You can also enter actual gross returns to calculate an observed return percentage and net result for the same stakes.
It is an explanatory tool, not a simulator or a forecast. It does not establish the RTP of a game, the chance of a profitable session, the maximum possible loss or the balance needed to complete a number of spins.
RTP and house-edge calculator
Enter the total stake per spin, number of spins and theoretical RTP. The figures show an expected-value calculation, not a session forecast. All money fields use AUD.
Calculated figures
- Total turnover
- Theoretical expected return
- Theoretical expected loss
- Theoretical house edge
Your entered results
- Observed return percentage
- Actual net result
Theoretical figures are averages under the entered model. They do not establish your chance of profit, a maximum loss, a guaranteed return or how long a balance will last.
Use AUD consistently in the monetary fields. The tool performs no exchange-rate conversion. Entering an amount from another currency does not convert it into Australian dollars.
Match each input to the question it answers
Total stake per spin
Use the whole paid-round cost, not the amount per payline. A different stake, extra bet or purchased feature needs separate treatment rather than being silently included in a constant-stake calculation.
Number of spins
Enter a positive whole number. The result assumes every included spin has the same total stake and stated RTP. It does not predict whether a starting balance will last that long.
Theoretical RTP
Use the return setting applicable to the exact configuration. A similarly named game or a different version’s figure is not evidence that the entered setting applies.
The optional actual-returns field is for gross game awards across those same stakes. It is not a deposit, a withdrawal or the ending account balance. Leave it blank when you do not have the matching total; the theoretical calculations still work.
Our how-to-play guide explains stake controls, and the provider hub covers game editions. Identify the correct product before applying an online percentage to it.
Follow the calculation with hypothetical figures
Example 1: the default inputs
A fictional A$0.50 stake over 100 spins produces A$50 of turnover. At a hypothetical 96% RTP, the theoretical expected return is A$48, the expected loss is A$2 and the house edge is 4%.
The A$2 figure is an expectation calculated from those inputs. It is not a guaranteed loss, spending limit or promise that A$2 will fund all 100 spins.
- Turnover: total stake per spin × number of spins.
- Expected return: turnover × RTP ÷ 100.
- Expected loss: turnover × (100 − RTP) ÷ 100.
- House edge: 100% minus the entered RTP.
Example 2: a larger turnover
A fictional A$2 stake over 500 spins gives A$1,000 of turnover. At an invented 95% RTP, the expected return is A$950 and expected loss A$50. The house edge is 5%.
These numbers do not describe a particular game or recommend a stake. Changing the stake or spin count changes the exposure in the calculation, not the underlying percentage entered.
Amounts are displayed to two decimal places. Display rounding can make small values appear as A$0.00; that is not a claim that a game has no risk. The odds and RTP guide explains the difference between an average return and a probability.
Observed return describes a sample, not the design
The UK Gambling Commission’s calculation guidance defines actual RTP using awards divided by turnover. The optional field uses that arithmetic for the sample you enter. It does not perform the statistical monitoring described in the regulator’s guidance.
Example 3: the same stakes, different actual awards
Using the A$50 turnover in the first example, enter A$40 of actual gross returns. The observed return is A$40 ÷ A$50 × 100 = 80%, and the actual net result is −A$10.
If the gross returns were A$75 instead, the observed return would be 150% and the net result +A$25. A sample can exceed 100% even though the theoretical input remains 96%.
An observed result below the theoretical figure does not establish that compensation is due on later spins. A result above it does not prove that a game will remain profitable. Both are descriptions of the entered sample, not a promise about what follows.
If your record combines different stakes or games, do not force it into a constant-stake model by inventing inputs. Keep a clear record of the actual amounts and scope. Our FAQ page explains why a balance is different from gross awards.
What the figures leave out
The Commission’s technical definitions distinguish theoretical return, observed return, volatility and turnover. Those definitions support the terminology here; they do not apply UK operating rules to an Australian customer.
This calculator does not model the distribution of possible outcomes. The same theoretical percentage can accompany different award patterns. Read the volatility guide rather than interpreting one expected-loss figure as a full risk description.
It also does not include promotional restrictions, fees, currency conversion or account withdrawals. Use the wagering calculator for bonus-target arithmetic and bonus terms explained for the conditions. A game’s RTP is not the expected value of an entire promotion.
A mathematical output cannot establish operator authorisation or reliable payment. See Australian gambling laws and withdrawal limits for those separate questions. Keep spending limits independent of the result and visit responsible gambling for support information. Return to the guides hub for related explanations.
RTP calculator FAQs
What does the RTP calculator calculate?
It calculates turnover, theoretical expected return, expected loss and house edge from a constant stake, spin count and RTP. Optional actual gross returns add an observed percentage and net result.
Should I enter my deposit as the stake?
No. Enter the total monetary cost of one paid spin. Turnover is that cost multiplied by the number of spins, not simply the starting deposit.
Does the expected loss tell me how much I will lose?
No. It is an expected-value calculation, not a personal forecast, maximum loss or statement of how long a balance will last.
What belongs in actual total returns?
Enter gross game awards for the same stakes used in the calculation. Do not enter a deposit, withdrawal or ending account balance. Leave it blank if the matching total is unknown.
Can observed return exceed 100%?
Yes. Awards greater than the sample’s total stakes produce an observed return above 100%. That does not establish a profitable theoretical game or predict future results.
Does a low observed return mean a win is due?
No. A sample below the theoretical figure does not create an entitlement to compensation or predict a later result.
Does the calculator account for volatility?
No. It does not model the distribution of outcomes, probability of profit or possible swings. Volatility requires separate information.
Can I combine different stakes or games?
The tool assumes the same stake and theoretical RTP for every included spin. Do not invent constant inputs for a mixed sample or assume one return setting applies to all games.
Does the calculator convert currencies?
No. Monetary fields use AUD, with no currency conversion. Enter amounts consistently rather than treating another currency’s number as a converted AUD value.
Does 100% RTP mean a risk-free session?
No. In the entered mathematical model it gives zero theoretical expected loss. It does not guarantee individual outcomes, verify a game’s specification or remove account and payment risks.