Student-Teacher Ratio Calculator
Check whether your school meets CBSE, RTE, and state norms for student-teacher ratio. Enter your numbers, get instant compliance status with level-wise breakdown.
Calculate Your School's Student-Teacher Ratio
The Student-Teacher Ratio (STR), also called Pupil-Teacher Ratio (PTR), measures the number of students per teacher. It is a key metric for CBSE affiliation, RTE compliance, and UDISE+ reporting.
Enter School Data
Your Student-Teacher Ratio
Recommended Student-Teacher Ratio — Reference Table
| Authority | Level | Max STR | Max Class Size |
|---|---|---|---|
| CBSE | Primary (1-5) | 30:1 | 40 |
| CBSE | Upper Primary (6-8) | 35:1 | 40 |
| CBSE | Secondary (9-10) | 30:1 | 40 |
| CBSE | Sr. Secondary (11-12) | 30:1 | 40 |
| RTE Act | Primary (1-5) | 30:1 | 30 |
| RTE Act | Upper Primary (6-8) | 35:1 | 35 |
| ICSE | All Levels | 30:1 | 40 |
Why Student-Teacher Ratio Matters
- CBSE affiliation and renewal: Schools must maintain prescribed STR to get or renew CBSE affiliation. Inspectors verify this during visits.
- Learning quality: Research consistently shows that lower STR leads to better individual attention, higher test scores, and improved classroom discipline.
- RTE compliance: The Right to Education Act mandates specific ratios for government-aided and private schools up to Class 8.
- UDISE+ reporting: STR is one of the key metrics submitted annually through the UDISE+ portal.
- Parent expectations: Increasingly, parents check STR when choosing schools — lower ratios signal quality.
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How to Improve Your Student-Teacher Ratio
- Hire subject-specific teachers rather than generalists — this improves effective STR per subject
- Split oversized sections into two — even if overall STR looks fine, individual sections may be too large
- Use teaching assistants for primary classes to reduce effective workload per teacher
- Balance across levels — some schools meet primary norms but exceed secondary limits
Frequently Asked Questions
CBSE recommends a maximum of 30:1 for primary and secondary levels, and 35:1 for upper primary. The maximum class size should not exceed 40 students per section.
No. Student-Teacher Ratio only counts teaching staff (PGTs, TGTs, PRTs). Non-teaching staff like clerks, lab assistants, and librarians are counted separately.
Under the RTE Act 2009, the prescribed ratio is 30:1 for primary (Classes 1-5) and 35:1 for upper primary (Classes 6-8).
For schools covering multiple levels (e.g., 1-12), STR should ideally be calculated level-wise. CBSE inspectors check level-wise ratios, not just the overall number.
Need Real-Time STR Tracking?
Schoolites automatically calculates your student-teacher ratio as enrollment and staff data changes — with instant alerts when you approach compliance limits.
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