Units

A unit is a self-defined measure of stake size, expressed as a fixed percentage of a bettor’s total bankroll rather than a dollar figure. Instead of saying “I bet $220 on the Cowboys,” a bettor working in units says “I bet 2 units,” where 1 unit has already been set as some consistent fraction — commonly 1% to 5% — of the money set aside for betting. The dollar value of a unit moves as the bankroll moves, but the unit itself stays a stable yardstick for comparing bets against each other.

The reason this matters is that raw dollar amounts hide information. If someone tells you they won $500 last month, you have no idea whether that’s a great result or a rounding error, because you don’t know their bankroll. If they tell you they’re up 8 units, you immediately know they returned roughly 8% of whatever they had in play, regardless of whether their bankroll is $1,000 or $100,000. Units strip the ego and the intimidation factor out of bet sizing and replace it with a ratio that’s comparable across bettors, across bankrolls, and across time.

Units also function as a built-in bet-sizing discipline. A bettor who assigns 1 unit to a coin-flip spread play and 3 units to a bet they consider a strong edge is encoding their confidence level directly into the stake, rather than betting the same amount on everything or, worse, chasing losses by betting bigger on the next game regardless of how good the play actually is. Serious bettors typically cap their biggest plays at 3-5 units and reserve those top sizes for a small number of games a season, not for every Sunday slate.

Example

Say a bettor sets aside a $2,000 bankroll for the NFL season and decides 1 unit = 2% of that bankroll, or $40. That $40 figure is fixed for the season unless the bankroll materially grows or shrinks — it doesn’t reset every week based on a hot or cold streak.

In Week 3, she likes the Detroit Lions -3 (-110) as a solid but not overwhelming edge, so she bets 1.5 units: 1.5 × $40 = $60. In Week 4, she has a much stronger read on the Buffalo Bills -6.5 (-115) and bets her max, 4 units: 4 × $40 = $160.

The Lions cover, so at -110 she wins $60 × (100/110) = $54.55, moving her record to +1.5 units on the season (she staked 1.5 units to win 1.36 units, but bettors typically log the unit result relative to stake risked, so this is recorded as +1.36u once you account for the vig — many trackers simplify to “+0.9u per unit staked” at standard -110 pricing).

The Bills lose outright, so she’s down her full 4-unit stake. Net across the two bets: roughly +1.36 units from the Lions minus 4 units from the Bills, for a net of -2.64 units on the season through Week 4 — even though in dollars that’s a loss of about $105.45 on a $2,000 bankroll, a manageable 5.3% dip rather than a crisis.

This is the real value of the exercise: she can post “-2.64u through 4 weeks” publicly or track it in a spreadsheet, and anyone following along — regardless of their own bankroll size — knows exactly how that compares to a hypothetical flat-betting record or to another handicapper’s season.

Key Points

• Set your unit size before the season, not per bet: Decide 1 unit = X% of your bankroll once, then hold it steady. Recalculating unit size after every win or loss turns a stability tool into a tilt amplifier.
• Keep the top of your range narrow: If your biggest bet is 5 units, that size should be rare — reserved for the handful of games a season where you have genuinely strong conviction, not a default you reach for out of excitement.
• Units let you evaluate handicappers fairly: A tout claiming “+40 units last year” is making a real, comparable claim; a tout claiming “+$40,000 last year” tells you nothing without knowing their stake sizes, so always ask what a unit was worth in that record.
• Remember the vig eats into unit math: At standard -110 pricing, winning exactly half your bets loses you money, since a 1-unit win only returns about 0.91 units of profit while a 1-unit loss costs the full unit — build that asymmetry into how you read a “break-even” record.
• Don’t confuse units risked with units won: A -3u day can mean one bad 3-unit bet or three separate 1-unit losses; when reviewing your own record, track both the stakes and the results so you can see whether your sizing, not just your picks, needs adjustment.
• Resist redefining unit size to make a losing streak look smaller: Shrinking your unit mid-slump to soften the on-paper numbers defeats the entire purpose of using a fixed, comparable measure in the first place.