Free Android app
Size up the odds of your sports bets
RTP Calculator instantly reveals the share of the stakes that the odds really give back to players. Enter the odds, get the RTP (Return To Player).
Example: for every €100 staked on this match's 1X2, the odds give €98.20 back to players. The rest stays with the bookmakers.
An app available in your browser and on mobile
RTP Calculator comes in two free, no sign-up versions with the same features:
Browser version
Enter the odds of a bet and get its RTP instantly. Supports decimal (EU), fractional (UK) and American (US) odds formats. You can enter an unlimited number of outcomes. Your history is kept in your browser.
Open the calculator (browser version)Android app
The same features, except that your analyses are saved locally on your smartphone. As in the browser version, you can share your analyses as images.
Download the Android versionWho is it for? Sports bettors who want to know what a bet really gives back and compare odds across operators. RTP Calculator is a decision-support tool — it does not provide betting tips and does not encourage gambling.
Guides
Understand what the odds really give back: the articles below will help you see why RTP matters to bettors.
What is the RTP of a sports bet?
The definition of Return To Player, how it is derived from the odds, a full worked example — and why the rate varies so much.
Read the guide →How to calculate a bookmaker's margin
The step-by-step method to measure the commission hidden in the odds, with two- and three-outcome examples.
Read the guide →Why accumulators are a gold mine for bookmakers
Odds multiply, but so do margins: the numbers behind the real price of accumulators and parlays.
Read the guide →Decimal, fractional, American odds: the three main formats
How to read each format, convert between them, and avoid comparison traps — with a conversion table.
Read the guide →Compare bookmakers by RTP rather than bonuses
A three-step method to judge an operator on its real price — its margin — rather than its marketing.
Read the guide →Sports betting terms explained
The words you come across without always understanding them — defined simply, with links to the detailed guides.
Read the guide →Legal
Privacy Policy
Last updated: 4 July 2026
1. Overview
RTP Calculator is an Android application developed and published by RTP (SIREN 103980686). This privacy policy describes what information is collected when you use the RTP Calculator app, how it is used, and what rights you have. For any question regarding this policy, please contact us at contact@rtpcalculator.com.
2. Data collected by the app
Data you enter directly. RTP Calculator allows you to save your betting analyses locally on your device: event names, event dates and times, bet outcomes, odds, bet types, bookmaker names, and the calculated RTP rates you choose to store in the app's history. This data is stored exclusively on your device and is never transmitted to any external server. It remains entirely under your control and can be deleted at any time by clearing the app's data or uninstalling the application.
Data we do not collect. The app does not require account creation or login. It does not access personal information stored on your device such as contacts, location, camera, or files.
3. Advertising — Google AdMob
RTP Calculator displays advertisements provided by Google AdMob, an advertising service operated by Google LLC. As part of this service, Google AdMob may collect and use certain data to deliver and personalise ads, including:
- Advertising identifiers from your device (Android Advertising ID)
- Data related to your use of the application
- Device information (model, operating system)
- Approximate location data (based on IP address)
This data is collected and processed by Google LLC in accordance with its own privacy policy, available at policies.google.com/privacy. Google AdMob may share this data with third-party advertising partners for the purpose of ad delivery and measurement.
4. GDPR compliance
In accordance with the General Data Protection Regulation (GDPR), you have the following rights regarding your personal data: right of access, right of rectification, right to erasure, right to object to processing, and right to restriction of processing. To exercise these rights, particularly regarding data collected by Google AdMob, you may visit Google's ad settings at adssettings.google.com, or contact us directly at contact@rtpcalculator.com.
5. Data collected on the website
Online calculator. The analyses you create in the online calculator (events, dates, outcomes, odds, bookmakers, RTP) are saved only in your browser's local storage and are never transmitted to any server. You can delete them at any time by clearing your browser's site data for rtpcalculator.com.
Audience measurement — Google Analytics. The website uses Google Analytics 4 (Google LLC) to measure its audience: pages viewed, device type, approximate country. This data is processed in accordance with Google's privacy policy, available at policies.google.com/privacy.
Advertising — Google AdSense. The online calculator pages may display ads provided by Google AdSense (Google LLC). In this context, Google and its advertising partners may use cookies and identifiers to serve ads, measure their performance and, with your consent, personalise them. On your first visit, a consent banner lets you accept, refuse or configure this processing; if you refuse, only non-personalised ads may be shown. You can change your choice at any time via the 'Cookie settings' link in the calculator's footer.
6. Adults only
RTP Calculator is strictly intended for users who have reached the legal age of majority in their country of residence. Users must also comply with the legal age requirements for sports betting applicable in their jurisdiction. The app is not directed at minors in any way and must not be used by anyone below the applicable legal age.
7. Changes to this privacy policy
We reserve the right to update this privacy policy at any time. In the event of a significant change, the "last updated" date at the top of this section will be revised. We encourage you to check this page periodically.
8. Contact
RTP — SIREN 103980686 — contact@rtpcalculator.com
Legal
Data Deletion Request
1. Data stored locally on your device
RTP Calculator saves your betting analyses (event names, event dates and times, bet outcomes, odds, bet types, bookmaker names, RTP rates) exclusively on your device. This data is never transmitted to any server. To delete it, you can:
- Go to your phone's Settings → Apps → RTP Calculator → Storage → Clear data
- Or simply uninstall the application
2. Advertising data collected by Google AdMob
RTP Calculator displays ads provided by Google AdMob, which may collect advertising identifiers, device information and approximate location data. To delete or reset this data, visit adssettings.google.com.
3. Request data deletion by email
For any additional data deletion request, contact us at contact@rtpcalculator.com with the subject line "Data Deletion Request — RTP Calculator". We will process your request within 30 days.