Plinko RTP and House Edge — How They Are Calculated

16 rows · High risk · 99% target RTP · $10.00 bet
Slot	Probability	Multiplier	RTP contribution	Share of return	Contribution per $1	Contribution on bet
0	0.0015%	169×	0.2579 pp	0.26%	$0.0026	$0.0258
1	0.0244%	66.2×	1.6162 pp	1.64%	$0.0162	$0.1616
2	0.183%	26×	4.7607 pp	4.82%	$0.0476	$0.4761
3	0.854%	10.2×	8.7158 pp	8.82%	$0.0872	$0.8716
4	2.78%	3.99×	11.0806 pp	11.21%	$0.1108	$1.1081
5	6.67%	1.57×	10.4641 pp	10.59%	$0.1046	$1.0464
6	12.22%	0.61×	7.4537 pp	7.54%	$0.0745	$0.7454
7	17.46%	0.24×	4.1895 pp	4.24%	$0.0419	$0.4189
8	19.64%	0.09×	1.7674 pp	1.79%	$0.0177	$0.1767
9	17.46%	0.24×	4.1895 pp	4.24%	$0.0419	$0.4189
10	12.22%	0.61×	7.4537 pp	7.54%	$0.0745	$0.7454
11	6.67%	1.57×	10.4641 pp	10.59%	$0.1046	$1.0464
12	2.78%	3.99×	11.0806 pp	11.21%	$0.1108	$1.1081
13	0.854%	10.2×	8.7158 pp	8.82%	$0.0872	$0.8716
14	0.183%	26×	4.7607 pp	4.82%	$0.0476	$0.4761
15	0.0244%	66.2×	1.6162 pp	1.64%	$0.0162	$0.1616
16	0.0015%	169×	0.2579 pp	0.26%	$0.0026	$0.0258

What the RTP means

The RTP is the long-run return generated by the full multiplier table, not by the largest payout alone. Every final slot matters: its probability is multiplied by its multiplier, and all those pieces are added together to give the expected return of the table.

The RTP formula

For a digital board, each slot has a probability and a multiplier, and the table return is the sum of all probability-weighted multipliers:

Expected return = Σ P(slot) × multiplier(slot)
RTP = expected return × 100%
House edge = 100% − RTP

If the actual table RTP is exactly 99%, the house edge is exactly 1%; at 97% it is 3%. Expected loss scales with total money staked. For 100 fixed $10 bets, turnover is $1,000: a 1% edge implies $10 expected loss. Turnover counts every bet, including bets funded by earlier payouts.

RTP contribution versus share of return

These measure different things. A slot’s RTP contribution is P(slot) × multiplier × 100, expressed in percentage points (pp). Its share of return divides that contribution by the full table RTP, so all shares add up to 100%.

Default slots 4 and 12: 11.0806 pp each
Each slot supplies about 11.21% of the total return.

Both slots tie for the largest contribution and are highlighted. Neither figure is the probability of hitting that slot: its landing probability is about 2.78%. The monetary columns show probability-weighted contributions, including any returned stake.

Why the model does not show exactly 99%

The whole multiplier table is scaled to the selected target before rounding. Values below 10× are rounded to two decimals, values from 10× to below 100× to one decimal, and values at or above 100× to whole numbers. RTP is then calculated from those displayed multipliers. Across the 81 available settings, the rounding difference from the target is less than 0.4 percentage points.

Why the top multiplier does not define return

A large edge multiplier can make a table look generous, yet the edge is one of the rarest outcomes. In the default table, one 169× edge contributes about 0.2579 percentage points to RTP. Slot 4 pays only 3.99× but contributes about 11.0806 points because it is much more likely. The chart keeps slots in board order and shows their weighted contributions.

Probability comes before return

This calculator assumes independent left/right steps with a 50% chance in each direction. Under those assumptions, a board with n rows has n + 1 slots and 2ⁿ equally likely paths; each far edge has only one path. The multiplier table then determines the return from that probability distribution. These assumptions are not a claim about every operator or physical board.

P(k) = C(n, k) / 2ⁿ

This is the p = 0.5 case of the binomial distribution described by NIST. Slot numbering starts at 0 on the left.

Rows, risk and house edge

Rows change the probability distribution and risk changes the shape of the multiplier table. In this synthetic model the target RTP keeps the average return close to the chosen level while low, medium and high risk redistribute that return across slots. Real casino tables may not match this Plinko RTP model, so each operator page should be checked separately.

Low risk

More value sits near common center slots, so the table usually has smaller swings and a lower top multiplier in the generic model.

High risk

More value moves toward rare edges, so the top multiplier rises while common outcomes carry smaller multipliers.

Expected return on a bet

At the default settings — 16 rows, high risk and a 99% target — the rounded table has about 98.8446% RTP and a 1.1554% house edge. A $10 bet has an expected total return of about $9.88 and an expected loss of about $0.12. For 100 fixed $10 bets, expected loss is about $11.55. These are averages from unrounded calculations, not predictions or loss limits for a session.

Why real Plinko RTP differs

This page uses a synthetic generic model. Real Plinko games can use different RTP values, multiplier tables, risk presets, rounding rules and maximum-payout limits, so do not assume Stake, Duel, BC.Game, Spribe, BGaming or another provider matches this table. Verified operator calculators should be built from live paytables.

Questions people ask

What is Plinko RTP?

It is the probability-weighted return of the full multiplier table — each slot's chance of being hit combined with the multiplier attached to that slot.

Is 99% RTP profitable for the player?

No. A 99% RTP means a 1% house edge. The long-run expectation is still negative for the player.

Does a bigger top multiplier mean higher RTP?

Not necessarily. RTP depends on the full table. A large edge multiplier can be offset by very small common-center multipliers.

Does risk level change RTP?

In this generic model risk changes the multiplier shape while the target RTP holds the average close to the chosen level. Real operators may use different settings, so their live tables should be checked separately.

Can RTP predict my next result?

No. RTP is a long-run average. It does not predict the next slot, payout or session result.