TFT Odds Calculator

Player Level:

Unit Cost:

Shop Slots:

Available Copies in Pool:

Total Copies in Pool:

Number of Shop Rolls:

Teamfight Tactics is a game where knowing when to roll can make a major difference. Whether you are looking for a specific 1-cost, 3-cost, 4-cost, or 5-cost champion, your chances depend on several factors, including your player level and the number of copies remaining in the shared champion pool.

The TFT Odds Calculator helps estimate those chances in a simple way. Enter your player level, desired unit cost, number of shop slots, available copies in the pool, total copies in the pool, and number of shop rolls. The calculator then estimates your chance of seeing the selected unit in an individual shop slot, in a complete shop, and across all of your planned rolls.

It also calculates the expected number of copies seen and highlights the chance of finding at least one copy during the selected number of rolls. These results can help you better understand whether continuing to roll is statistically reasonable or whether saving gold and waiting for a better opportunity may make more sense.

Important: TFT's exact champion odds and pool mechanics can change between sets and patches. This calculator uses the probability table built into the provided tool, so use it as an estimation and planning tool rather than a guarantee of an in-game result.

What Is a TFT Odds Calculator?

A TFT Odds Calculator is a probability tool designed to estimate the likelihood of finding a particular champion based on the assumptions entered into the calculator.

In TFT, each shop contains multiple champion slots. The champions offered are influenced by the player's level and the cost tier of the champion. The availability of copies in the shared pool can also affect the likelihood of finding a specific unit.

This calculator combines these factors into several useful results:

Estimated Per-Slot Odds
Chance Per Shop
Chance Over All Rolls
Expected Copies Seen
At Least One Copy

Rather than looking only at a single percentage, you can use these results to understand how your probability changes when you roll multiple times.

For example, a relatively small chance in one shop can become much more meaningful after dozens of shop slots are viewed.

Why TFT Champion Odds Matter

TFT revolves heavily around resource management. Gold can be used for rolling, leveling, or maintaining an economy. Rolling at the wrong time can leave you without enough gold to stabilize your board or reach an important level.

Understanding probability can help answer questions such as:

Should I roll now or save?
How likely am I to find a 4-cost unit?
How much does my current level affect my target?
Does having fewer copies available make the search significantly harder?
How many shops should I expect to see before finding a copy?
Is my desired champion realistically attainable during this roll-down?

Probability does not determine exactly what will appear in your shop. Instead, it provides a statistical expectation that can help you make more informed decisions.

How to Use the TFT Odds Calculator

Using the calculator is straightforward. Follow these steps.

Step 1: Select Your Player Level

The calculator supports levels from 2 through 11.

Choose your current TFT player level.

This matters because the calculator's built-in probability table assigns different champion cost distributions to different levels.

For example, the probability of seeing a 1-cost champion is generally different from the probability of seeing a 4-cost or 5-cost champion at the same level.

Step 2: Select the Unit Cost

Choose the cost tier of the champion you are looking for:

1-Cost
2-Cost
3-Cost
4-Cost
5-Cost

If you are looking for a specific 4-cost champion, select 4-Cost.

The calculator then uses the corresponding cost-tier probability for your selected level.

Step 3: Enter Shop Slots

Enter the number of shop slots being considered.

The default value is 5, representing a standard five-unit shop.

For example, if you are calculating the probability of finding your target in one complete five-slot shop, enter:

5 shop slots

Step 4: Enter Available Copies

Enter the number of copies of your desired champion that are currently available in the pool.

For example:

Available Copies = 10

This value is used to determine how much of the total pool remains available for your target.

Step 5: Enter Total Copies in the Pool

Enter the total number of copies assumed for the selected champion or relevant pool.

The default value is:

The calculator requires the available copies to be no greater than the total copies.

Step 6: Enter Number of Shop Rolls

Enter the number of shops you plan to roll through.

For example:

Number of Shop Rolls = 10

The calculator uses this value to estimate the cumulative probability of seeing at least one copy during those rolls.

Step 7: Click Calculate

After entering your values, click Calculate.

The calculator produces five results showing different aspects of your probability.

Understanding the TFT Odds Calculator Results

Estimated Per-Slot Odds

This represents the estimated chance of your selected champion appearing in one shop slot.

It combines the selected cost-tier probability with the proportion of copies you entered as available.

A low per-slot probability does not necessarily mean that finding the champion is unlikely over an entire roll-down. You get multiple opportunities because each shop contains multiple slots and multiple shops can be viewed.

Chance Per Shop

This is the estimated probability of seeing at least one target copy in the number of shop slots entered.

For a five-slot shop, the calculator considers five independent opportunities using its probability model.

For example, if the per-slot probability were 5%, the chance of getting at least one success in five slots would be higher than 5%.

This is why looking only at per-slot odds can underestimate the practical chance of seeing a unit in a complete shop.

Chance Over All Rolls

This result estimates your chance of finding at least one copy across the number of shops you entered.

If your chance per shop is relatively small, repeatedly viewing shops increases the cumulative probability.

This is often one of the most useful numbers when planning a roll-down because it answers a practical question:

"What is my approximate chance of seeing the target at least once during these rolls?"

Expected Copies Seen

Expected copies represent the statistical average number of copies you would expect to see over the total number of shop slots considered.

It is important to understand that this is an average, not a prediction.

If the calculator says the expected number is 1.50, that does not mean you will definitely find one or two copies. You could find zero, one, two, or more.

Expected value becomes more meaningful when looking at repeated situations rather than one individual game.

At Least One Copy

The final highlighted result represents the chance of finding at least one copy over the calculated roll period.

In this calculator, this value is the same cumulative probability represented by Chance Over All Rolls.

This is particularly useful for players who are interested in whether a specific champion will appear at least once rather than how many copies they might find.

TFT Odds Calculator Formula Explained

The calculator uses several probability steps.

1. Pool Probability

The first calculation is: $Pool\ Probability = \frac{Available\ Copies}{Total\ Copies}$

Suppose there are 10 available copies out of a total pool of 60: $10 \div 60 = 0.1667$

So the pool probability factor is approximately 16.67%.

This is then combined with the cost-tier probability.

2. Single-Slot Probability

The calculator obtains a cost-tier percentage based on the selected player level.

It then calculates: $Single\ Slot\ Odds = Cost\ Tier\ Probability \times Pool\ Probability$

For example, if the selected level gives a 30% probability for the chosen cost tier and the pool probability is 16.67%: $0.30 \times 0.1667 = 0.0500$

That produces an estimated per-slot probability of approximately 5%.

3. Chance Per Shop Formula

The calculator uses the complement of the probability of getting zero successful slots: $Shop\ Chance = 1-(1-Single\ Slot\ Odds)^{Slots}$

Suppose the per-slot probability is 5% and there are five slots: $1-(1-0.05)^5$ $1-(0.95)^5$

The result is approximately: $0.2262$

or about 22.62%.

This illustrates why five opportunities in one shop can produce a considerably higher chance than the probability of a single slot.

4. Chance Across Multiple Rolls

For multiple shops, the calculator uses: $Roll\ Chance = 1-(1-Shop\ Chance)^{Rolls}$

If the chance per shop were approximately 22.62% and you considered 10 rolls: $1-(1-0.2262)^{10}$

This produces the cumulative chance of getting at least one success during those rolls under the calculator's probability assumptions.

The important concept is that repeated opportunities accumulate.

5. Expected Copies Formula

The expected number of copies is calculated as: $Expected\ Copies = Slots \times Rolls \times Single\ Slot\ Odds$

For example, with:

5 slots
10 rolls
5% per-slot probability

the calculation is: $5 \times 10 \times 0.05 = 2.5$

The expected number would therefore be 2.50 copies.

Again, this does not mean exactly 2.50 copies will appear. It represents a mathematical expectation across repeated outcomes.

TFT Odds Example

Let's consider a hypothetical scenario.

You are searching for a 4-cost champion and enter:

Input	Example
Player Level	8
Unit Cost	4-Cost
Shop Slots	5
Available Copies	10
Total Copies	60
Shop Rolls	10

At level 8, the calculator's built-in table assigns a 30% cost-tier probability to 4-cost units.

The pool factor is: $10 \div 60 = 0.1667$

The estimated single-slot probability is therefore: $0.30 \times 0.1667 = 0.05$

or 5% per slot.

With five slots, the chance per shop becomes: $1-(1-0.05)^5$

which is approximately 22.62%.

Across 10 shops, the cumulative chance is approximately: $1-(1-0.2262)^{10}$

This produces a probability of roughly 92.5% under the calculator's assumptions.

The expected copies are: $5 \times 10 \times 0.05 = 2.50$

This example demonstrates an important TFT probability concept: a 5% chance per slot can become a much larger cumulative probability when you receive many opportunities.

How Player Level Changes Champion Odds

Player level is one of the most important inputs in the calculator.

The built-in table changes the distribution between 1-cost, 2-cost, 3-cost, 4-cost, and 5-cost champions depending on level.

For example, the calculator's table contains the following values:

Level	1-Cost	2-Cost	3-Cost	4-Cost	5-Cost
5	45%	33%	20%	2%	0%
6	30%	40%	25%	5%	0%
7	19%	30%	40%	10%	1%
8	16%	20%	32%	30%	2%
9	15%	18%	25%	33%	9%
10	5%	15%	25%	40%	15%
11	1%	10%	20%	45%	24%

These values show the calculator's intended relationship between player level and champion cost.

For example, according to the calculator's built-in assumptions, moving from level 7 to level 8 increases the 4-cost probability from 10% to 30%.

Moving from level 8 to level 9 increases it again to 33%.

This is why choosing the correct player level is essential when using the tool.

Available Copies and Pool Probability

The number of copies available can dramatically affect the estimated chance.

Consider two situations:

Situation A

Available copies: 30
Total copies: 60

$30/60 = 50\%$

Situation B

Available copies: 5
Total copies: 60

$5/60 \approx 8.33\%$

The second situation has a much smaller pool factor.

This illustrates why simply knowing your level is not always enough when estimating the likelihood of finding a specific champion.

If many copies are already unavailable under your assumptions, the calculator will produce a lower estimated chance.

Why Expected Copies Are Different From Guaranteed Copies

One of the most important concepts when using an odds calculator is the difference between expected value and guaranteed results.

Suppose the calculator reports:

Expected Copies Seen = 2.00

That does not guarantee that two copies will appear.

Random probability can produce outcomes such as:

0 copies
1 copy
2 copies
3 copies
More than 3 copies

The expected value represents the average outcome over a large number of comparable situations.

This is why TFT players can sometimes experience extremely lucky or unlucky roll-downs even when the underlying probability appears favorable.

Tips for Using TFT Odds More Effectively

Consider Your Economy

A probability estimate does not tell you whether you should spend all your gold. Your economy, health, board strength, and future leveling plans still matter.

Compare Different Levels

If you are deciding whether to level before rolling, use the calculator to compare your target champion's estimated odds at different levels.

Look at Cumulative Probability

Do not focus only on per-slot probability. If you plan to roll through many shops, the cumulative chance can provide a more useful perspective.

Remember Pool Availability

The available-copy input has a direct effect on the calculator's estimate. If you have reason to believe many copies are unavailable, adjust the input accordingly.

Use Estimates, Not Guarantees

Even a high cumulative probability does not guarantee success in a particular game. Random outcomes can always differ from expected results.

Common Mistakes When Calculating TFT Odds

Using the Wrong Level

Selecting level 8 when you are actually level 7 can significantly change the calculated cost-tier probability.

Entering the Wrong Cost

If you are looking for a 4-cost champion, selecting 3-cost will produce a completely different estimate.

Ignoring Pool Availability

Using the maximum pool size when many copies are unavailable can make the estimated probability appear more favorable than your assumptions should allow.

Confusing Shops With Slots

A shop contains multiple slots. The chance per slot and chance per shop are therefore different measurements.

Treating Expected Copies as a Promise

Expected copies are averages, not guaranteed results.

Frequently Asked Questions

1. What is a TFT Odds Calculator?

A TFT Odds Calculator estimates the probability of finding a selected champion based on player level, unit cost, shop slots, available copies, total pool copies, and number of rolls.

2. What does "Per-Slot Odds" mean?

Per-slot odds represent the estimated chance that the target champion appears in one individual shop slot under the calculator's assumptions.

3. What does "Chance Per Shop" mean?

Chance per shop represents the estimated probability of seeing at least one target copy across the number of shop slots entered.

4. What is "Chance Over All Rolls"?

It is the estimated probability of finding at least one copy during the total number of shops or rolls specified in the calculator.

5. What does Expected Copies Seen mean?

Expected copies seen is the mathematical average number of target copies expected across all calculated shop slots. It does not guarantee that you will actually receive that number.

6. Why does player level affect TFT odds?

Different player levels have different cost-tier distributions in the calculator's built-in probability table. Selecting the correct level therefore changes the estimated probability for your target cost.

7. Why does the number of available copies matter?

The calculator uses available copies divided by total copies as a pool-probability factor. Fewer available copies therefore produce a lower estimated chance under this model.

8. Can I calculate the odds of finding a 5-cost champion?

Yes. Select the appropriate player level and choose 5-Cost from the Unit Cost menu. The calculator will use the corresponding built-in probability.

9. Does a 90% chance guarantee that I will find my champion?

No. A 90% probability still means there is approximately a 10% chance of not finding the target under the model. Probability describes likelihood, not certainty.

10. Are TFT odds always the same?

No. TFT sets, patches, champion pools, shop mechanics, and probability tables can change. The results of this calculator depend on the probability assumptions built into the current tool, so you should verify current game information when exact live-game values are important.

Conclusion

The TFT Odds Calculator provides a practical way to understand champion roll probabilities without manually performing several probability calculations. By entering your player level, unit cost, shop slots, pool information, and planned number of rolls, you can estimate both individual and cumulative chances.

The most useful result will depend on what you are trying to accomplish. Per-slot odds help you understand the basic probability, chance per shop shows what can happen during a complete shop, and cumulative roll odds show how your chances change when you continue rolling. Expected copies provide another perspective by estimating the average number of copies across all considered opportunities.

Most importantly, use probability as a decision-making aid rather than a guarantee. TFT remains a game of random outcomes, and even favorable odds can produce unlucky results. Combining the calculator's estimates with your economy, board strength, player level, pool information, and current game situation can help you make more informed roll-down decisions.