Free tools

Betting calculators

Size every bet, evaluate every price, convert every format. The same maths sharps run — built into clean, instant tools.

Odds Converter

Convert between American, decimal and fractional odds instantly. Edit any field — the others update.

American

Decimal

Fractional

Converted60.0% at these odds.

American-150

Decimal1.67

Fractional2/3

Three ways to write the same price

American (+150 / −200) is standard in the US. Decimal (2.50) is used across Europe and exchanges. Fractional (3/2) is traditional in the UK and Ireland.

They all describe the identical payout — just different notation. Decimal is the easiest to do maths with: payout = stake × decimal odds.

Common odds reference

−200dec 1.50 · frac 1/2 · prob 66.7%

−150dec 1.67 · frac 2/3 · prob 60.0%

−110dec 1.91 · frac 10/11 · prob 52.4%

+100dec 2.00 · frac 1/1 · prob 50.0%

+150dec 2.50 · frac 3/2 · prob 40.0%

+200dec 3.00 · frac 2/1 · prob 33.3%

+500dec 6.00 · frac 5/1 · prob 16.7%