Free charts: the cost of betting, measured daily
These charts are drawn from our live archive of bookmaker prices — tens of millions of
odds snapshots across 30+ bookmakers — and they update every day. They are
free to republish (news articles, blogs, social posts, papers) under
CC BY 4.0:
just credit "Bet Better" with a link to this page or the
Margin Index. Right-click a chart to save or copy it.
What it shows: the average built-in bookmaker margin on match-winner odds,
per sport, on the latest measured day. Lower = cheaper for the bettor. Source data and
method: the Margin Index (daily CSV available).
Credit line: Chart: Bet Better (betbetter.world), CC BY 4.0
Embed this chart on your own page — copy this line. It stays up to date on its own.
What it shows: the all-sport average margin on match-winner odds over the
last 30 days. Source: the Margin Index.
Credit line: Chart: Bet Better (betbetter.world), CC BY 4.0
Embed this chart on your own page — copy this line. It stays up to date on its own.
What it shows: for every band of chance, what the odds said would happen
and how often it really did, across 18,238 settled markets. Source and method:
our calibration study.
Credit line: Chart: Bet Better (betbetter.world), CC BY 4.0
Embed this chart on your own page — copy this line. It stays up to date on its own.
Use our data? Add the badge
If one of our numbers, charts or files helped your page, you are welcome to this small badge.
It links back to us, which is all the credit we ask for.
Copy this line to add it:
Want the numbers behind these? The Margin Index serves
the full dataset as CSV, also CC BY. For bookmaker-by-bookmaker ratings, see
Bookmaker Ratings by Real Cost.
Bet Better is not a bookmaker and does not accept wagers. Information is for educational purposes only.
Gamble responsibly — only bet what you can afford to lose. 18+. National Gambling Helpline 1800 858 858.
If betting stops being fun, take a break — see our responsible gambling resources.