Ask experienced bettors what separates people who last from people who burn out, and you’ll hear about bankroll management more than picking winners. One common way to describe and track a bankroll is the unit system.
This guide covers what a unit is, how to size bets with it, how it works with different odds, and how it can support disciplined limits. It ends with responsible gambling, which matters more than any betting strategy.
What Is a Unit in Sports Betting?
A unit is a standardized measure of bet size, initially set as a percentage of the money set aside for betting. In Hank’s system, 1U = 1% of your starting bankroll.
If your starting bankroll is $1,000, 1U = $10. If it’s $5,000, 1U = $50. If it’s $250, 1U = $2.50. Your bankroll should be money you can afford to lose without affecting rent, bills, savings, or your well-being.
Why Use Units Instead of Dollars?
Units make stakes comparable across bankroll sizes. A 3U bet represents 3% of the starting bankroll in this system, whether that bankroll is $500 or $20,000. The financial impact on each person can still differ, and a fixed unit becomes a different percentage of the remaining balance as it changes.
Tracking results in units provides context that dollars alone cannot. A $250 profit on a $1,000 bankroll is different from $250 on a $50,000 bankroll. Unit totals still need context: stakes, odds, total amount wagered, and a complete record of losses.
How to Calculate Your Unit Size
Unit size = Starting bankroll × 0.01
| Bankroll | 1U | 3U | 5U | 6U | 7U |
|---|---|---|---|---|---|
| $250 | $2.50 | $7.50 | $12.50 | $15 | $17.50 |
| $500 | $5 | $15 | $25 | $30 | $35 |
| $1,000 | $10 | $30 | $50 | $60 | $70 |
| $2,500 | $25 | $75 | $125 | $150 | $175 |
| $5,000 | $50 | $150 | $250 | $300 | $350 |
Should Your Unit Size Change?
Hank’s approach is to hold the starting unit size for 6 to 12 months, rather than recalculating after every win or loss. This describes his tracking method, not a requirement to continue betting through losses.
- Consistent records. Holding 1U at a fixed dollar amount makes unit totals easier to compare over that period.
- Fewer reactive changes. A predetermined amount can reduce the temptation to change stakes after a hot or cold streak.
- A longer review period. More observations can provide context, but time alone does not guarantee a meaningful sample, a profitable strategy, or that variance will even out.
How It Works in Practice
With a $1,000 starting bankroll, 1U stays $10 during the chosen period. A 3U bet is $30, a 5U bet is $50, and a 7U bet is $70. At the planned review, a $1,500 bankroll would make a newly calculated unit $15; a $700 bankroll would make it $7.
A Word of Caution
A fixed stake becomes a larger share of what remains after losses. If $1,000 falls to $700, a $10 unit is about 1.4% of the remaining bankroll, and a $70 stake is 10%. Pause, reduce exposure, or stop before a planned review if your limits or circumstances require it. Never deposit more just to “reset” your units after losses.
The Unit Scale: How Many Units Does Hank Use?
Hank labels plays from 1U to 7U according to his stated confidence. These labels do not establish the true probability of winning or make a larger bet safe.
The Everyday Scale: 1U to 5U
- 1U: a lower-confidence play or thinner perceived edge.
- 2U–3U: moderate to strong stated confidence.
- 4U: high stated confidence.
- 5U: the top of the everyday scale, reserved for the most confident play of the day when one qualifies.
The Occasional Plays: 6U and 7U
- 6U: Play of the Week. An occasional designation, not a scheduled weekly bet.
- 7U: Play of the Month. The ceiling of this system and rarer than a 6U play.
Not every week has a 6U, and not every month has a 7U. No stake should increase because someone needs action or wants to recover a loss.
What a 7U Ceiling Does—and Does Not—Mean
A 7U bet risks 7% of the starting bankroll, seven times a 1U stake. That is a substantial exposure, and a cap does not prevent serious damage. Two 7U losses cost 14% of the starting bankroll; multiple open bets can create much greater combined exposure. Upsets, injuries, and ordinary uncertainty remain at every stake.
With a fixed $10 unit, a 6U play is $60 and a 7U play is $70. Keeping the labels rare does not remove the financial risk.
Betting to Risk, Not to Win
In this system, the unit amount is the amount risked. The potential profit changes with the odds. “To win” below means profit, excluding the returned stake.
Why Does the Payout Change?
American odds describe the payout and imply a probability before accounting for the bookmaker’s margin. Negative odds usually identify the favorite; positive odds usually identify the underdog. The price is not a guarantee of the true chance of winning.
The Formulas
Negative odds: profit in units = units risked × (100 ÷ absolute value of odds).
Positive odds: profit in units = units risked × (odds ÷ 100).
Worked Examples
Chiefs ML at −120: risk 5U to win 5 × (100 ÷ 120) = approximately 4.17U. With a $10 unit, risk $50 for approximately $41.67 profit.
Eagles ML at +125: risk 3U to win 3 × (125 ÷ 100) = 3.75U. With a $10 unit, risk $30 for $37.50 profit.
| Odds | Risk | To win |
|---|---|---|
| −200 | 1U | 0.50U |
| −150 | 1U | 0.67U |
| −120 | 1U | 0.83U |
| −110 | 1U | 0.91U |
| +100 | 1U | 1.00U |
| +125 | 1U | 1.25U |
| +150 | 1U | 1.50U |
| +200 | 1U | 2.00U |
Why Risk-Based Tracking Matters
Betting to win a fixed amount requires different stakes: 1.2U to win 1U at −120, or 2U to win 1U at −200. Betting to risk makes the exposure explicit: a 3U bet risks 3U regardless of price. It does not improve the chance of winning.
How Units Can Discourage Chasing Losses
Chasing means increasing stakes or placing impulsive bets to recover losses. A unit system can support limits, but cannot prevent chasing on its own.
- Predefined amounts reduce decisions made in the moment.
- Stake caps set boundaries, but total daily exposure also matters.
- A fixed unit avoids automatic increases after a win or loss.
- Complete records show the cumulative cost, including losing bets.
If you feel compelled to recover losses, stop and take a break rather than relying on a unit rule to control the urge.
Variance: Why Losing Streaks Happen
At −110 odds, the break-even win rate for equal stakes is approximately 52.4%. A hypothetical bettor winning 55% over a large sample could profit at those odds, but long losing streaks can still occur. A short winning period does not establish an edge.
Ten straight losses at 2U cost 20U, or 20% of the starting bankroll under a fixed 1% unit. Smaller stakes reduce the amount exposed, but no stake scale guarantees you will survive a rough patch. Stakes of 5U–7U create substantial exposure even if used rarely.
Common Unit Betting Mistakes
- Treating the top tier as a requirement. There need not be a 5U, 6U, or 7U play in any period.
- Using money needed elsewhere. Rent, bills, savings, and borrowed money are not a bankroll.
- Changing stakes reactively. Use planned reviews, while allowing earlier reductions or stopping when needed.
- Increasing bets after a loss. That is chasing.
- Not tracking results. Record date, bet, odds, units risked, and outcome.
- Assuming units guarantee profit. Units describe exposure; they do not make a selection more likely to win.
A Simple Example: A Week of Unit Betting
For illustration, a $1,000 starting bankroll gives a $10 unit. Potential profit and net units below are rounded to two decimal places.
| Day | Bet | Odds | Risk | To win | Result | Net |
|---|---|---|---|---|---|---|
| Mon | Team A ML | −110 | 2U | 1.82U | Win | +1.82U |
| Tue | Team B ML | +130 | 1U | 1.30U | Loss | −1.00U |
| Wed | Team C ML | −120 | 3U | 2.50U | Loss | −3.00U |
| Thu | Team D ML | +125 | 2U | 2.50U | Win | +2.50U |
| Fri | Team E ML | −130 | 5U | 3.85U | Win | +3.85U |
The displayed rounded entries sum to +4.17U. Calculated before rounding, the total is approximately +4.1643U (+$41.64). Actual settlement rounding may vary. This example happens to end positive; the unit system does not cause that outcome.
Gambling Responsibly
A unit system describes betting exposure. It cannot tell you whether you should be betting at all.
Sports Betting Is Entertainment, Not Income
No system, strategy, or handicapper guarantees profit. Treat money wagered as money you may lose. Historical results are not a promise of future performance.
Core Principles
- Only use money you can afford to lose, never funds for essentials or debt payments.
- Set deposit, loss, wagering, and time limits before betting.
- Never chase losses or deposit more to get even.
- Do not bet under the influence or when stressed, angry, or distressed.
- Take regular breaks and keep relationships, work, hobbies, and sleep a priority.
- Do not borrow to gamble.
- Meet the legal age requirement and only participate where permitted.
Warning Signs of a Gambling Problem
- Thinking about gambling constantly or feeling restless when cutting back.
- Needing larger stakes for the same excitement.
- Chasing losses, hiding gambling, or lying about spending.
- Borrowing, selling belongings, or missing bills to gamble.
- Gambling to escape stress or low mood.
- Feeling guilt or shame, or seeing harm to relationships, work, or school.
Where to Get Help
The National Council on Problem Gambling lists 1-800-MY-RESET (1-800-697-3738) as its current U.S. National Problem Gambling Helpline. Call or text for support, available 24/7, or use online chat.
Gamblers Anonymous offers peer support. State and operator self-exclusion programs can help restrict access to betting. Outside the U.S., contact your local gambling support service or health service. You do not have to handle this alone.
Key Takeaways
- In this system, 1U starts at 1% of the initial bankroll; a fixed unit is not always 1% of the remaining balance.
- Hank’s 6–12 month review period is a tracking approach, not a reason to keep betting through financial harm.
- The 1U–7U labels express stated confidence, not certainty; larger stakes carry substantial risk.
- Betting to risk makes the stake explicit while potential profit changes with odds.
- Units can support limits but cannot prevent chasing, losses, or gambling problems.
- No system guarantees profit. Stopping is always an option.
Read more in the Hammering Hank FAQs or browse the educational blog.
This article is for educational purposes only, not financial advice or a guarantee of outcomes. Sports betting involves risk and you can lose money. Only adults of legal age may participate where permitted. For U.S. gambling support, call or text 1-800-MY-RESET.