OSRS Colosseum Calculator
What a Fortis Colosseum run is worth by the wave you reach, your chance of every unique and Smol Heredit, the runs to a sunfire set and the glory you earn.
Your chance of each unique
| Unique | A run | On average | Half get it by | Each | Adds to a run |
|---|
How long until it drops
Runs to a sunfire fanatic set
A sunfire roll always gives a piece you are missing, so a set takes exactly three of them.
Every wave, side by side
| Clear to | Minutes | A unique | A run | An hour | Go on if you die less than |
|---|
The loot from one run
| Item | On average | Each | Worth |
|---|---|---|---|
| A run |
What each wave's chest can hold
| Item | Chance | Worth |
|---|---|---|
| A unique | ||
| This chest on average |
Glory, wave by wave
Pick the modifier you took before each wave, type how long the wave took on the timer and tick the waves where nothing hit you.
| Wave | Modifier | Modifiers | Time bonus | This wave | Run total |
|---|
Glory titles
| Title | Glory | Unlocks | Fewest waves | Always by | You |
|---|
What your Sol Heredit kills should have given
Every kill is a full run of 12 waves. Type your kill count, or load it from the hiscores, to see the uniques it adds up to.
| Unique | Expected | At least one |
|---|
A run is every wave from 1 to the last one you clear and claim. Each cleared wave adds its chest: one roll on that wave's table, from wave 4 a roll that can be a unique, and at wave 12 Dizana's quiver and a 1 in 200 chance of Smol Heredit as well. Die, log out or teleport during a wave and the whole run's loot is lost, which these figures do not count. Loot is priced at what it sells for right now, after the 2% tax. The quiver cannot be sold, so it is worth the 4,000 sunfire splinters Minimus gives for it, nothing if you keep it, and a second pet roll if you trade it for one. When two or three echo crystals drop, each is taken as equally likely. Minutes a run are 1 for wave 1 alone and 24 for all 12 waves; a run that ends between them is placed on a straight line from one to the other and marked with a ~. Glory without a typed time uses 2 minutes a wave, also marked with a ~. The potions and runes you use are not taken off. Figures checked against the OSRS Wiki on 25 October 2026.
How the Colosseum's chest pays
The Fortis Colosseum has 12 waves, and the twelfth is Sol Heredit. Before each wave you see the loot that clearing it will add, and between waves you can leave with everything so far. Wave 1 always gives 80 sunfire splinters. From wave 4 each chest can be a unique instead of its normal loot, and the chance climbs every wave, from 1 in 124 at wave 4 to 1 in 12 at wave 12. A unique is an echo crystal or a sunfire fanatic piece from wave 4, and from wave 7 the Tonalztics of Ralos too. Clearing all 12 waves gives a unique about 1 time in 5.
| Wave | A unique | By this wave | Echo crystal | Sunfire piece | Tonalztics |
|---|---|---|---|---|---|
| 4 | 1/124 | 1/124 | 1/310 | 1/206.67 | – |
| 5 | 1/110 | 1/59 | 1/275 | 1/183.33 | – |
| 6 | 1/96 | 1/37 | 1/240 | 1/160 | – |
| 7 | 1/82 | 1/26 | 1/218.67 | 1/145.78 | 1/1,312 |
| 8 | 1/68 | 1/19 | 1/181.33 | 1/120.89 | 1/1,088 |
| 9 | 1/54 | 1/14 | 1/144 | 1/96 | 1/864 |
| 10 | 1/40 | 1/11 | 1/106.67 | 1/71.11 | 1/640 |
| 11 | 1/26 | 1/8 | 1/69.33 | 1/46.22 | 1/416 |
| 12 | 1/12 | 1/5 | 1/32 | 1/21.33 | 1/192 |
Once a unique is rolled, waves 4 to 6 give an echo crystal 4 times in 10 and a sunfire piece 6 times in 10. From wave 7 it is 6 in 16, 9 in 16 and 1 in 16 for the Tonalztics. An echo crystal comes as two or three 1 time in 10. The sunfire roll always picks a piece you do not have yet, so the fourth piece you see is the first duplicate.
How glory works
Every cleared wave earns glory: 100 times the wave number for clearing it, the same again if no enemy hit you, the glory of every modifier you have taken, and a time bonus that starts at 500 times the wave number and loses the wave number every game tick, so it reaches nothing at 5 minutes. Only your best run counts, and you keep a wave's glory even if you die in the next one. Each modifier gives more at a higher tier, and you pick one before every wave, wave 1 included.
| Modifier | Glory a wave by tier | Offered |
|---|---|---|
| Bees! | 150, 300, 450 | From wave 2 |
| Blasphemy | 100, 200, 300 | Any wave |
| Doom | 200, 400, 600 | From wave 2 |
| Dynamic Duo | 150 | Waves 7 to 11 |
| Frailty | 200, 400, 600 | Any wave |
| Mantimayhem | 150, 300, 450 | Waves 2 to 11 |
| Myopia | 200, 400, 600 | From wave 2 |
| Reentry | 150, 300, 450 | Waves 2 to 11 |
| Red Flag | 250 | Waves 7 to 11 |
| Relentless | 200, 400, 600 | Any wave |
| Solarflare | 250, 500, 750 | From wave 2 |
| Quartet | 100 | From wave 2 |
| Totemic | 200 | From wave 2 |
| Volatility | 100, 200, 300 | From wave 2 |
Wave 1 offers only Relentless, Blasphemy and Frailty. Red Flag and Dynamic Duo appear from wave 7, and Dynamic Duo, Mantimayhem, Reentry and Red Flag are not offered for wave 12. Clearing all 12 waves gives at least 16,350 glory, so a full run does not always reach Grand Champion at 20,000.
Colosseum questions
Do I keep my loot if I die? No. Dying, logging out or teleporting during a wave loses the run's loot. You keep the glory from the waves you cleared, and until you have cleared 100 waves Death's reclaim fee for the Colosseum is cut by 75%.
How many waves are there? Twelve: eleven waves of enemies, then Sol Heredit. The Colosseum solver shows each wave's safe tiles and the order to clear it with your modifiers, and where Sol Heredit's next attack lands.
How do I get Smol Heredit? Each Sol Heredit kill rolls 1 in 200, and each quiver you trade to Minimus for a pet roll is another 1 in 200. Once you have the pet, Minimus offers splinters only. The pet calculator has every other pet.
Is it worth going on to the next wave? The last column of the wave table answers it: if your chance of dying in the next wave is lower than that figure, going on is worth more on average than leaving. It weighs the next chest against everything the run has built, using the average loot of each wave.
How unlucky is a dry streak somewhere else? The dry calculator has every other boss, and the Doom of Mokhaiotl calculator has Doom's uniques by depth.
Update history
Every change to this calculator
- Calculator added