who was pi first calculated by?
The value of π was first rigorously calculated (not just guessed) by the ancient Greek mathematician Archimedes of Syracuse around 250 BCE.
Quick Scoop: Who first calculated π?
If the question is “who was π first calculated by?”, the historically accepted answer is:
- Archimedes of Syracuse (c. 287–212 BCE).
- He used a clever polygon method : he drew regular polygons inside and outside a circle and kept doubling the number of sides (up to a 96‑gon).
- From this, he proved that π lies between 22371\tfrac{223}{71}71223 and 227\tfrac{22}{7}722, which is roughly 3.14.
Because his method was systematic and could, in principle, reach any desired accuracy, historians often call π “Archimedes’ constant.”
But was he really the first?
The story is a bit more nuanced:
- Much earlier cultures (Babylonians, Egyptians, etc.) already used rough approximations of π when working with circles, architecture, and land measurement, often taking π as about 3 or 3.16.
- However, these were practical estimates , not rigorous algorithms.
- Archimedes is credited with the first recorded mathematical algorithm for calculating π with proof‑level accuracy, so in most textbooks and exam-style questions the expected answer is Archimedes.
Mini timeline of early π calculations
| Who / culture | When | What they did with π |
|---|---|---|
| Babylonians & Egyptians | ~2000–1600 BCE | Used rough values of π (about 3 to 3.16) for measurements and building works. | [9]
| Archimedes (Greece) | ~250 BCE | Developed the first rigorous polygon algorithm and trapped π between 223/71 and 22/7 ≈ 3.14. | [1][5][3]
| Liu Hui (China) | 263 CE | Refined the polygon method, getting π accurate to about 3.1416. | [1]
| Zu Chongzhi (China) | 5th century CE | Calculated π between 3.1415926 and 3.1415927; used famous fraction 355/113. | [1]
Direct exam-style answer
If you just need a short, exam‑friendly reply:
π was first rigorously calculated by Archimedes of Syracuse , who used polygons around 250 BCE to approximate its value as about 3.14.
TL;DR: Many ancient peoples used π‑like numbers, but Archimedes is the one who first calculated π with a proper mathematical method, so he’s the standard answer to “who was π first calculated by?”.
Information gathered from public forums or data available on the internet and portrayed here.