Simple Inputs.
Instant Answers.
No downloads, no account, no waiting. Trevly's calculators run entirely in your browser—enter your numbers and get a clear result in seconds.
Trevly's tools run entirely inside your browser. No data ever leaves your device. There's nothing to install, no account to create, and no features locked behind a paywall. Open a calculator, enter your numbers, and you're done.
Four steps from question to answer
Pick Your Calculator
Browse the eight tools on the Academic Calculators page and open the one that matches your question—GPA, final grade, attendance, marks percentage, grade predictor, class rank, assignment impact, or study hours.
Enter Your Numbers
Each calculator has clearly labelled fields. Use the exact values from your syllabus—course weights, credit hours, attended classes, total marks—so the output reflects your real situation, not a rough guess.
Get Your Result Instantly
Calculations happen in real time as you type. Most tools display a primary result—your GPA, required exam score, remaining absences—along with a breakdown so you can see exactly how the number was reached.
Use It to Plan Ahead
Adjust your inputs to model different scenarios. What if you score 90% on the final instead of 75%? What if you miss two more classes? Change the numbers and the result updates immediately—no page reloads.
Key Features Built Into Every Tool
Every calculator on Trevly is built around one principle: give students a direct answer without friction. That means no popups asking you to sign up, no ads interrupting your workflow, and no results hidden until you share your email.
All processing happens locally in your browser using JavaScript. Nothing is sent to a server, stored in a database, or associated with your identity. Your grades, attendance records, and academic standing are your information—they stay on your device.
Mobile-first design means the tools work just as well on a phone between classes as they do on a laptop at a desk. Every input, result, and breakdown is readable and tappable on any screen size.
What every calculator includes
- Real-time results as you type—no submit button needed
- Full privacy: all calculations run locally in your browser
- Mobile-optimised layout for phones and tablets
- No account, no signup, no email required
- Step-by-step breakdowns showing how results are calculated
- What-if scenario modelling by adjusting any input
- Works on all modern browsers without plugins
- HTTPS encryption on every page
The eight tools and what they solve
GPA Calculator
Weighted semester and cumulative GPA, plus CGPA-to-percentage conversion across 4.0, 5.0, and 10-point scales.
Grade Calculator
Calculates your current grade and the exact score you need on any remaining assignment or final exam to hit your target.
Marks Percentage
Converts raw marks to percentage for a single subject or across multiple subjects with different totals.
Grade Predictor
Models best-case and worst-case final grades, and tells you whether your target is still mathematically achievable.
Class Rank
Estimates your percentile standing based on GPA, class size, and grade distribution—useful for scholarship screening.
Attendance Calculator
Tracks your current attendance percentage and tells you exactly how many more classes you can miss before hitting the minimum.
Assignment Calculator
Shows the real grade impact of any individual assignment so you can prioritise effort where it actually moves the needle.
Study Hours Planner
Turns your credit load and course difficulty into a concrete weekly study target—no more vague "study more" advice.
Built to answer the question you actually have
Most academic calculators make you hunt for the right tool, enter data in an awkward format, and produce a result with no context. Trevly was built the other way around—starting from the question a student is standing in front of right now.
"What do I need on the final?" Open the Grade Calculator. "Can I skip Friday?" Open the Attendance Calculator. "Is my GPA good enough for this scholarship?" Open the Class Rank Calculator. Every tool is built around a real question, not a category from a textbook.
No account needed. No cost. No limits on how many times you use them. That's it.
