Calculators for the thinking punter
A small, quick collection of odds tools written for British and Irish racing. No sign-up, no pop-ups, no tipster's mailing list to dodge — just the sums, and a brief word in each corner about what the sums are for.
Odds converter
Fractional, decimal, American and implied probability, all talking to each other.
Stake & each-way
What a winning bet returns, and what an each-way does when the horse hits the frame.
Multiples
Doubles, trebles, accumulators, plus the full card — Trixie through to Goliath.
Rule 4 deductions
The proper Tattersalls scale applied to your winnings when a horse is withdrawn.
Tote dividend
Convert a Tote return to its fixed-odds equivalent, and see if the pool beat the board.
Dead-heat reducer
When two horses can't be separated, here is what your return actually becomes.
Overround / book %
Add up a bookmaker's percentages and find out exactly how heavily stacked the market is.
Why another calculator site?
Because the ones already out there are, by and large, terrible. Bookmaker-owned tools are little more than funnels for sign-up bonuses; the independent sites that do exist tend to be buried under ten pop-ups, a cookie banner and a sidebar of advertising that jumps about each time a new frame loads. The sums themselves are straightforward — it is the presentation that is so often botched.
Oddsworks does the arithmetic accurately and gets out of the way. Each calculator is accompanied by a short, honest note on what the calculation is actually doing and where the common misunderstandings lie. If something can be simplified, it has been. If something cannot, it is explained.