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RBE means Red Bloon Equivalent and tells you how many bloons you will have to pop in the current round.
~ Round 5 in Bloons TD 4

A RBE of 14 while playing a stage on Easy in BTD4

The RBE display before Round 1

Red Bloon Equivalent (RBE) is a new addition that debuted in Bloons TD 4. It displays how many Red Bloons would need to be popped to equal the amount of pops it would take to pop the bloons of a round or any group of bloons. So, for example, in the picture to the right fourteen pops are required to pass that particular Round. It also appears in Bloons TD 4 Expansion and Bloons TD 5. The lowest RBE of a round in BTD4 is 11, the highest is 2881116 on Flash (Round 250 - no rounds were programmed after this). The final round has 999 B.F.B.s, and it is nearly impossible to survive, even if your entire screen is filled with Sun Gods, meaning Operation: Dart Storms are a must.

In BTD5, all Freeplay rounds have a random RBE past round 85, the highest non-freeplay round is 62440 (Round 84, though Impoppable Round 85 has 83,280) while the lowest is 3 (Round 24).

RBE in Bloons Tower Defense 5.

RBE Values for each round[]

BTD Rounds

BTD2 Rounds

BTD3 Rounds

BTD4 Rounds

BTD5 Rounds

Round RBE Base RBE Bloon spawns
1 20 20
2 35 35
3 35 35
4 71 71
5 59 59
6 57 57
7 75 75
8 92 92
9 90 90
10 204 204
11 78 78
12 80 80
13 169 169
14 145 145
15 151 151
16 152 152
17 48 48
18 240 240
19 141 141
20 66 66
21 230 230
22 176 176
23 154 154
24 43 43
25 210 210
26 207 207
27 535 535
28 138 138
29 260 260
30 207 207
31 406 406
32 495 495
33 72 72
34 778 778
35 1,015 1,015
36 760 760
37 1,202 1,202
38 1,157 1,157
39 1,620 1,620
40 616 616
41 2,040 2,040
42 517 517
43 1,198 1,198
44 1,150 1,150
45 2,289 2,289
46 684 684
47 1,598 1,598
48 2,752 2,752
49 4,771 4,771
50 3,540 3,540
51 2,030 2,030
52 3,447 3,447
53 2,248 2,248
54 4,872 4,872
55 5,296 5,296
56 2,496 2,496
57 4,344 4,344
58 5,780 5,780
59 4,270 4,270
60 3,164 3,164
61 6,530 6,530
62 8,247 8,247
63 14,413 14,413
64 6,264 6,264
65 18,966 18,966
66 7,496 7,496
67 6,410 6,410
68 5,628 5,628
69 6,680 6,680
70 13,184 13,184
71 9,280 9,280
72 10,280 10,280
73 11,256 11,256
74 18,054 18,054
75 25,402 25,402
76 6,240 6,240
77 22,596 22,596
78 26,382 26,382
79 45,804 45,804
80 16,656 16,656
81 44,506 43,996 (+2%)
82 52,320 51,120 (+4%)
83 22,680 22,320 (+6%)
84 51,480 49,480 (+8%)
85 30,704 28,704 (+10%)
86 27,040 25,240 (+12%)
87 63,008 57,408 (+14%)
88 63,600 57,904 (+16%)
89 64,384 58,624 (+18%)
90 2,756 2,516 (+20%)
91 71,160 64,560 (+22%)
92 117,408 103,008 (+24%)
93 62,936 54,512 (+26%)
94 178,112 150,812 (+28%)
95 80,860 71,260 (+30%)
96 238,952 200,232 (+32%)
97 69,984 56,384 (+34%)
98 327,456 266,256 (+36%)
99 47,424 40,128 (+38%)
100 67,200 50,720 (+40%)
101-199 Random Random
200 5,391,840 200,640 (+3,250%)
201-9,999 Random Random
10,000 40,645,592,000 10,032,000 (+493,250%)
10,001 1,279,872 1,279,872 (+493,300%)
10,002 98,697,200 47,200 (+493,350%)
10,003 740,208,800 258,800 (+493,400%)
10,004 4,934,935,200 1,435,200 (+493,450%)
10,005 197,427,200 67,200 (+493,500%)
10,006-200,135 Depends 10,032,000 (+Depends%)
200,136-3,865,535 824,001,792,000 10,032,000 (+10,000,000%)
3,865,536+ 0 0 None

Round RBE Base RBE Bloon spawns
100 67200 50720
101-199 Random Random
200 5391840 200640
201-9,999 Random Random
10,000 40,645,592,000 10,032,000
10,001 1,279,872 1,279,872
10,002 98,697,200 47,200
10,003 740,208,800 258,800
10,004 4,934,935,200 1,435,200
10,005 197,427,200 67,200
10,006-3,865,536 Round*8,240,000+1,792,000 10,032,000


Trivia[]

  • The lowest round RBE (as of now) is 3, the green camo on round 24 in Bloons TD 5.
    • The second lowest RBE (as of now) is 11 on round 24 in BTD4 as mentioned above.
    • The highest non-randomized round RBE (as of now) is 2,881,116 on round 250 in BTD4; however, this is only available in freeplay.
  • In Bloons TD 4, the RBE of the Camo Bloon in Round 24 should be 11, yet the in-game RBE says 9.
  • In BTD5, rounds 21 and 36 are the only rounds that consist entirely of Pink Bloons.
  • In BTD5, some Daily Challenges have a modified RBE.
  • RBE is sometimes confused to stand for Rate Bloons Explode.

See Also[]

  • Pre-Round Comment if you're wondering what the comment is before the rounds, you will be dedicated to this page.
  • Rounds if you want to know more about the rounds' RBE.
  • Bloons TD Battles for an exact RBE list for the game.