What does Challenge Rating actually measure?
CR estimates the level of a four-person party for whom one monster is a fair fight — nothing more precise than that.
Challenge Rating compresses a stat block — hit points, armor class, damage output, special abilities — into a single difficulty number. A party of four adventurers of a given level should find a single monster of the same CR a challenging but survivable encounter.
The number is a starting point, not a guarantee. Action economy, terrain, and how well a monster’s abilities counter a specific party all bend the curve — which is why difficulty is worth calculating per fight rather than trusted from CR alone.
A monster’s challenge rating tells you how great a threat the monster is. An appropriately equipped and well-rested party of four adventurers should be able to defeat a monster that has a challenge rating equal to its level without suffering any deaths.— D&D 5e SRD 5.1 (CC-BY-4.0)
How much XP is each CR worth?
XP grows non-linearly: a CR 1 monster is worth 200 XP, a CR 5 is 1,800, and the top of the SRD sits at CR 30.
Every Challenge Rating maps to a fixed XP value, and the curve steepens fast. The table below covers every CR that actually appears in the SRD, with the number of monsters at each.
| CR | XP | SRD monsters |
|---|---|---|
| CR 0 | 10 | 29 |
| CR 1/8 | 25 | 19 |
| CR 1/4 | 50 | 32 |
| CR 1/2 | 100 | 33 |
| CR 1 | 200 | 25 |
| CR 2 | 450 | 43 |
| CR 3 | 700 | 22 |
| CR 4 | 1,100 | 15 |
| CR 5 | 1,800 | 27 |
| CR 6 | 2,300 | 10 |
| CR 7 | 2,900 | 6 |
| CR 8 | 3,900 | 10 |
| CR 9 | 5,000 | 8 |
| CR 10 | 5,900 | 6 |
| CR 11 | 7,200 | 7 |
| CR 12 | 8,400 | 2 |
| CR 13 | 10,000 | 8 |
| CR 14 | 11,500 | 3 |
| CR 15 | 13,000 | 4 |
| CR 16 | 15,000 | 5 |
| CR 17 | 18,000 | 4 |
| CR 19 | 22,000 | 1 |
| CR 20 | 25,000 | 3 |
| CR 21 | 33,000 | 4 |
| CR 22 | 41,000 | 2 |
| CR 23 | 50,000 | 3 |
| CR 24 | 62,000 | 2 |
| CR 30 | 155,000 | 1 |
Where do the SRD’s monsters actually sit?
73% of the SRD's 334 monsters are CR 5 or below — high-CR threats are rare by design.
The single most common rating is CR 2 with 43 monsters. From there the counts fall away steadily: past CR 17 most ratings hold only one or two entries, and the entire top of the range is carried by dragons — up to Tarrasque at CR 30.
By creature type, Beasts dominate with 97 entries, followed by humanoids (50) and dragons (43). If your campaign needs variety at high levels, expect to reach beyond the SRD — or homebrew it.
How do I use CR to build a fight?
Budget XP against your party’s thresholds, multiply for monster count, and check the total — not the CR label.
Encounter difficulty comes from XP budgets, not from matching CR to level. Each character contributes an XP threshold at Easy, Medium, Hard and Deadly; the party’s totals set the bar. Multiple monsters multiply their combined XP — six wolves are far deadlier than their raw sum suggests.
Every monster page on this site runs that math live: pick a party size and level next to any stat block and the difficulty updates instantly.
Found the monster? Open its page and use the built-in encounter calculator before initiative is rolled — the Encounter Builder handles the multipliers for you.