Enter your bankroll and a unit percentage to see what one unit is worth in real money, and how much of your bankroll goes into play over a typical week. A "unit" is a consistent slice of your bankroll staked per bet, instead of picking a number by feel each time. Sizing it as a percentage rather than a fixed amount means stakes shrink automatically through a rough patch and grow again once you're back up — a lot harder to manage by instinct alone. Unit stake = bankroll × unit percentage. Multiply by however many bets you're planning that week for your total exposure, plus what slice of the whole bankroll that represents. A £1,000 bankroll with a 2% unit works out to £20 per unit. Ten bets a week at one unit each puts £200 — a fifth of the whole bankroll — into play across that week, worth pausing on before committing. A percentage-based unit shrinks automatically after a losing run and grows again once you're back up, handling a chunk of the risk management without needing to think about it mid-streak. No single right answer — it depends on your own risk appetite and how many bets you plan. Many recreational staking plans land somewhere between 1% and 5% per bet, but treat that as a starting point, not a rule. Not automatically — it's a snapshot based on whatever figure you enter. Recalculate periodically as your real bankroll shifts, rather than sticking with the same amount indefinitely.Bankroll & Unit Size Calculator
Key terms, plainly put
The maths behind it
Worked example
Unit size, by bankroll
Bankroll 1% unit 2% unit 3% unit 5% unit £200 £2.00 £4.00 £6.00 £10.00 £500 £5.00 £10.00 £15.00 £25.00 £1,000 £10.00 £20.00 £30.00 £50.00 £2,500 £25.00 £50.00 £75.00 £125.00 £5,000 £50.00 £100.00 £150.00 £250.00 Common questions
Why use a percentage instead of the same amount every time?
What unit size should I use?
Does this track wins and losses changing my bankroll over time?
Bankroll & Unit Size Calculator
Rates are fixed reference values for display only, not live market rates.
1 unit stake–
Weekly exposure (all bets at 1 unit)–
% of bankroll staked weekly–
For 18+ use only. These figures are for working things out, nothing more — they don't predict a result or promise a return. If betting stops feeling fun, that's worth paying attention to. Free, confidential help is available at BeGambleAware.