How to use
- Set total token supply — used for the informational breakdown (absolute tokens per tier)
- Set the largest holder’s share (Top-1) as a percentage
- Adjust the average share for Top 2–5 and Top 6–10 holders
- If you set an average share that exceeds a higher tier (e.g. Top 2–5 avg > Top-1), the calculator gently clamps the lower tier so holder ranks stay consistent
- The calculator shows CR5 (top-5 concentration) and CR10 (top-10 concentration)
- Rating scale (aligned with on-chain analytics article): CR10 < 30% — excellent, 30–50% — good, 50–70% — moderate, 70–90% — high, > 90% — extreme. Author’s heuristic: CR10 > 80% is critical
- For context: BTC ≈ 6% top-10 addresses (≈ 25% top-10 entities); mature L1s typically sit in the 15–35% range
Calculator
Holder Concentration (CR10)
CR10
0%
top-10 share
CR5
0%
top-5 share
Rating
—
—
Absolute token breakdown:
— (Top-1),
— (each of Top 2–5),
— (each of Top 6–10).
Formulas
CR5 = Top1_pct + 4 × Top2_5_pct
- Top1_pct — largest holder’s share (%)
- Top2_5_pct — average share of each holder ranked 2–5 (%)
- CR5 — total top-5 concentration, capped at 100% (computed)
CR10 = CR5 + 5 × Top6_10_pct
- CR5 — total top-5 concentration (computed)
- Top6_10_pct — average share of each holder ranked 6–10 (%)
- CR10 — total top-10 concentration, capped at 100% (computed)
Concentration rating scale (CR10)
- CR10 < 30% — excellent (tokens well distributed)
- CR10 30–50% — good (acceptable concentration)
- CR10 50–70% — moderate (watch whale activity)
- CR10 70–90% — high concentration (> 80% is a critical heuristic for manipulation risk)
- CR10 > 90% — extreme (red flag: near-monopoly control)
See also
CR5 and CR10 are one family of concentration measures. Two other canonical metrics — the Gini coefficient and the Herfindahl–Hirschman Index (HHI) — are discussed in the parent article On-Chain Analytics for Tokenomists, along with methodology notes on excluding exchange, treasury, and bridge addresses before computing any of these.