📊 Percentile & Quartile Calculator
Dataset analysis · client‑side · instant quartiles, percentiles, IQR · no server
✅paste any numbers
✅Q1, Q2, Q3, IQR
✅custom percentile
✅private, offline
Dataset analysis – percentile & quartile tool
⚡ pure javascript · method = linear interpolation (CDF)
📐 method: R‑type 6 (Excel N+1)
📏 n = 0
📊 sorted → -
⚡ IQR = -
🧮 client‑side
🔒 no upload
📐 Quartiles & selected percentile
sorted ascendingMinimum -
Q₁ (25th percentile) -
Q₂ / Median (50th) -
Q₃ (75th percentile) -
Maximum -
Interquartile range (IQR) -
Custom percentile (75th) -
🔹 IQR method fences: lower = Q₁ – 1.5·IQR, upper = Q₃ + 1.5·IQR
🛡️ 100% private: all calculations in your browser. Zero network.
no data leaves device
Percentile method explained
Uses linear interpolation between points (R‑type 6, similar to Excel PERCENTILE.INC). Quartiles: Q1 = 25th, Q2 = 50th, Q3 = 75th. All computed client‑side.
✓ sorted automatically
✓ handles commas/spaces
📐🔢
outlier detection
IQR ± 1.5 rule
📊 data analysis · client‑side
quartiles · percentile · IQR
⚡ instant calculation