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Betting units calculator

A unit is a fixed slice of your bankroll, so bets are compared in units instead of dollars. 1 unit = 1% of bankroll is the usual starting point: with $1,000, one unit is $10.

One unit

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Risk: –
Share of bankroll: –
To win: –
Total payout: –

For information only. Not betting advice. 21+.

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How it works

Your unit is a set percentage of your bankroll. A bet is then sized in units: a 1-unit bet, a 2-unit bet, a half unit. Tracking results in units keeps records comparable as the bankroll changes, and between people who bet different amounts.

1 unit = bankroll × unit % ÷ 100 ($1,000 × 1% = $10)
Risk = units × unit size
To win = risk × (decimal odds − 1). Payout = risk + to win

Some people quote a favorite as "to win 1 unit" instead of "risk 1 unit". Switch the toggle to see that version: at -110, winning 1 unit ($10) means risking $11.

Questions

What is a unit in sports betting?

A fixed amount you size every bet from, usually a percentage of your bankroll. With a $1,000 bankroll and 1% units, one unit is $10, so a 2-unit bet is $20.

How big should a unit be?

Commonly quoted sizes run from 1% to 5% of the bankroll. A smaller unit means a run of losses takes a smaller share of the bankroll. This page does the math only; the choice is yours.

Does 1 unit mean risking 1 unit or winning 1 unit?

Both are used. Risk-based is the most common. Some people size favorites to win 1 unit, which means risking more than a unit on minus odds. The calculator has a switch for each.

Why track bets in units instead of dollars?

Units make a record comparable no matter the bet size. +10 units means the same thing for someone betting $10 a unit and someone betting $100 a unit.

All questions How grading works