Betting Units Explained
The measurement system that makes records comparable and bankrolls survivable.
A unit is a fixed percentage of your bankroll — for most bettors, 1%. A $1,000 bankroll makes one unit $10; a $50,000 bankroll makes it $500. Every bet is expressed as a multiple of that unit, and every record is graded in units won or lost.
▸ Why units instead of dollars
Two reasons, and both matter:
- Comparability. "+$4,000" is meaningless without knowing the stakes behind it — a reckless bettor can show big dollar wins while losing units. "+40 units on 500 bets" tells you everything: risk-adjusted performance over a real sample. This is why the CAPTRACKER leaderboard ranks handicappers by units won, not dollars claimed.
- Survival. Fixed fractional sizing means a losing streak shrinks your bets automatically. Betting 1-unit flat, a 10-bet losing streak at -110 costs about 10% of bankroll — painful, survivable. Betting 10% a game, the same streak destroys you.
▸ The math at standard pricing
| BET (1u AT -110) | WIN | LOSE |
|---|---|---|
| Risk | 1.00u | 1.00u |
| Return | +0.91u | −1.00u |
Because a win returns 0.91u while a loss costs a full unit, a 50% bettor bleeds money. You need 52.38% at -110 to break even — which is why record-without-odds is meaningless. A 55-45 record on heavy favorites can lose units; a 45-55 record on underdogs can win them.
▸ Sizing your unit and your bets
- Unit = 1% of bankroll is the standard. 2% is aggressive; 5% is a countdown to zero.
- Bets range 0.5u to 2u. If your sizing regularly hits 3u+, you're not expressing confidence, you're chasing.
- Re-size periodically, not per-bet. Recalculate your unit monthly or at ±25% bankroll moves.
- Optimal sizing exists — the Kelly criterion computes it from your edge, and the Kelly calculator does the arithmetic. Most professionals bet fractional Kelly (a quarter to a half) because edge estimates are always uncertain.
▸ Reading units on a leaderboard
When you evaluate a handicapper's units-won figure, ask three questions: over how many settled picks (hundreds, or a hot week)? At what average odds (juice-heavy favorites inflate win rates)? And is it timestamped by a third party (self-reported records routinely delete losses)? Every record on CAPTRACKER is timestamped at ingestion and settled against external score data — that's the standard your own ledger should meet too.
▸ FAQ
What is a unit in sports betting?
A unit is a fixed percentage of your bankroll — typically 1% — used as the standard stake size. Records measured in units won are comparable across bettors regardless of bankroll size.
How much should a unit be?
The standard is 1% of the money you've set aside for betting. A $2,000 bankroll means a $20 unit. More aggressive sizing raises both growth and risk of ruin — 5% units can lose half your bankroll in a routine cold stretch.
What does +10 units mean?
The bettor's settled wins minus losses, weighted by stake and odds, total ten units of profit. At a $50 unit that's $500. Always check the settled sample size behind the number — +10 units on 40 picks is noise; on 400 picks it's evidence.