Sri Lanka vs Tonga: Theoretical duration of lower secondary education
Sri Lanka
4 years
in 2025
Tonga
4 years
in 2025
Sri Lanka rank
17th
Tonga rank
17th
Theoretical duration of lower secondary education over time
- Sri Lanka
- Tonga
How they compare
Sri Lanka currently reports 4 years against 4 years in Tonga, a difference of 0 years.
The two have swapped places 1 time across 56 shared years of data; in 1970 it was Sri Lanka ahead.
Sri Lanka ranks 17th and Tonga ranks 17th of 215 countries.
Across the 6 decades both report, Sri Lanka averaged higher in 3 and Tonga in 2.
Head to head by decade
| Decade | Sri Lanka | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 5 years | 4 years | 1 years | Sri Lanka |
| 1980s | 5 years | 4 years | 1 years | Sri Lanka |
| 1990s | 4.8 years | 4 years | 0.8 years | Sri Lanka |
| 2000s | 4 years | 4 years | 0 years | — |
| 2010s | 4 years | 4.8 years | 0.8 years | Tonga |
| 2020s | 4 years | 4.5 years | 0.5 years | Tonga |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher theoretical duration of lower secondary education, Sri Lanka or Tonga?
- Sri Lanka, at 4 years against 4 years in Tonga as of 2025.
- What is the difference in theoretical duration of lower secondary education between Sri Lanka and Tonga?
- 0 years, with Sri Lanka ahead.
- How many years of comparable data are there for Sri Lanka and Tonga?
- 56 years are reported by both, from 1970 to 2025.
- How do Sri Lanka and Tonga rank globally for theoretical duration of lower secondary education?
- Sri Lanka ranks 17th and Tonga ranks 17th of 215 countries.
- Where does this data come from?
- UNESCO Institute for Statistics, published as Theoretical duration of lower secondary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
February 2026 Data Release