Calculator guides

Whole, half and quarter lines settled step by step: why −0.75 on a 1-0 win is a half win and £100 at 1.95 pays £147.50 on one.

How to split one stake so every pick pays the same: combined odds, break-even chance and why three scores at 2.95 need a 33.9% chance.

How to size a hedge on a single, an acca or an exchange lay: on our £50 acca an equal hedge locks in £57.30 and beats a £90 cash-out.

Five ways to strip the margin from a market, how to pick the reference bookmaker and why an underdog's fair odds can run from 11.49 to 13.16.

How the Elo calculator turns a rating gap into match chances and fair odds: a 150-point gap with home advantage gives the home side 52.6%.