Quick calculators and advanced simulators for edtech & education to make data-driven business decisions.
EdTech Student Retention
ActiveSimulate retention on your platform. Predict where learners drop off and design interventions that work.
Online Calculator
ActiveFree online calculator with virtual keypad and full keyboard support. Add, subtract, multiply, divide — no download required.
Scientific Calculator
ActiveFree scientific calculator in your browser: sin/cos/tan, logarithms, square roots, powers, exp, π, e. RAD or DEG mode.
Sector context
Whoever runs an SMB academy, technical institute, or online course competes simultaneously with large institutions (heavy brand spend) and individual creators (low price). The challenge: project enrollment without over-promising, sustain cohort retention without diluting quality, and scale content without tutorial-support cost becoming unviable. An academy with 500 students and 5% monthly churn loses 25 students every month; recovering them demands proportional marketing spend. The education simulators model that full funnel: acquisition, cohort retention, scale, and instructor capacity.
Key metrics
Indicators an SMB operator in the sector should know before modeling decisions.
Cohort retention rate
% of students completing the program. Typical online cohorts swing 30–60%; in-person academies can hit 80%+.
CAC per student
Total marketing + sales spend / new students. A $40 USD CAC for a $300 USD course leaves margin; a $180 USD one doesn't.
Student LTV
Average revenue a student generates across their full relationship with the academy (upsells, additional courses, certifications).
Student-to-tutor ratio
For courses with tutorial support, this defines variable cost per student. Healthy ratios: 1:30 for webinars, 1:8 for intensive synchronous tutoring.
Program NPS
Leading indicator of retention. A sustained NPS above 40 predicts low churn; below 20 is an early flight signal.
How to pick the right simulator
If your question is acquisition (how many enrollments do I need to not lose money next term?), start with the enrollment projection simulator. If retention is the pain, the student retention simulator models cohorts month by month and isolates where in the program you lose students. If you sell B2B corporate training, the corporate training simulator handles longer sales cycles and higher tickets. And if you're considering scaling an online academy from 500 to 5,000 students, the scale-online-courses simulator shows you where the model breaks (tutoring, infrastructure, marketing).
Practical example
Hypothetical case in US dollars. Plug your real numbers into the simulator to validate your own scenario.
An online academy sells a six-month program at $480 USD per student with $65 USD CAC and 4% monthly churn. Initial cohort is 400 students; 314 remain at the end (78.5% retention). Total revenue collected: 400 × $480 USD = $192,000 USD (upfront billing). Total CAC: 400 × $65 USD = $26,000 USD. Gross margin before tutoring: $166,000 USD. If tutoring cost is $90 USD per student (1:30 ratio with tutors at $30 USD/hour), that's $36,000 USD. Net operating margin: $130,000 USD per cohort, or $21,667 USD/month equivalent. The simulator lets you flex price, tutorial ratio, and churn to find break-even.
Common modeling mistakes
Traps we see when reviewing sector planning. Avoid them before closing your own model.
Confusing enrollment with retention
Selling 400 enrollments isn't keeping 400 students; modeling retention monthly avoids celebrating numbers that deflate in the program's second half.
Underestimating tutorial support cost
A recorded class costs zero per marginal student; a human tutor answering questions doesn't. If your value prop is quality, model tutoring as variable cost, not fixed.
Assuming high LTV without proven upsell
Saying 'the student returns' without data inflates LTV. If your historical upsell curve is 18%, model 18%, not 50%.
Ignoring strong seasonality
January, August, and September enrollment can be 3× the annual average; a linear-demand model understates required capacity during peaks.
Scope and limitations
Education simulators don't validate pedagogical quality or curriculum. A program that retains poorly can show financially attractive numbers if the initial cohort is large, but its trajectory is unsustainable. For pedagogical evaluation use learning instruments (assessments, NPS, completion rate per unit), not just this model.
Start here
The simulators with the most adoption in the sector. Each tackles a different business question.
Student retention
Models cohorts month by month to isolate where the learning funnel breaks.
Scale online courses
Finds the breaking point as you grow from 500 to 5,000+ students.
Enrollment projection
Anticipates enrollment flow against seasonality and campaigns.
Corporate training
B2B sales cycle, high tickets, and deliverables per program.