Free Engineering Tools Built for Students
Calculate attendance, convert CGPA, solve matrices, plan your finances, and more — 20+ professional-grade tools, all free, all instant, no login needed.
Every Tool an Engineering Student Needs
From academics to electronics to finance — everything in one place, designed to save you time and help you think clearly.
Get Your Answer in Three Steps
No accounts, no software, no waiting. Every tool runs directly in your browser.
Built for Real Engineering Students
Not another generic calculator site. Every tool here was built because an engineering student actually needed it.
Your All-in-One Engineering Companion
EnggPrep.in was built by engineering students, for engineering students. We know the exact problems you face every semester — calculating whether you can skip Monday's lecture, converting CGPA for that internship application, or decoding a resistor during your electronics lab.
Instead of hunting across ten different websites, EnggPrep puts every tool you need in one clean, fast, mobile-friendly place. No ads blocking your view, no login walls, no premium subscriptions.
Engineering Calculator Tools — All in One Place
EnggPrep.in is a free online platform offering 20+ calculators, converters, and utilities built specifically for engineering students in India. Whether you're managing your attendance, working through a circuit design problem, preparing a job application, or handling a financial decision — our tools give you fast, accurate answers with no complications.
Attendance Calculator — Never Guess Again
One of the most common daily questions for any engineering student is: "How many classes can I bunk?" Our Attendance Calculator removes all guesswork. Enter your total classes held, classes attended, and the minimum required attendance percentage (typically 75% or 85%) — and you'll instantly see how many more classes you can safely miss, or how many you need to attend to get back on track.
This tool is used by thousands of students every semester to manage their schedule around internships, college fests, travel, or simply their mental health. Stop doing this math in your head.
CGPA and SGPA Conversion Tools
Academic grading in India varies by university. VTU uses a 10-point scale, SPPU uses a 7-point scale, Anna University uses letter grades with grade points — and most job applications still ask for percentage. Our CGPA-to-percentage and SGPA-to-CGPA converters handle all of this:
- CGPA to Percentage — Convert your CGPA to a percentage using the formula recognized by most Indian universities
- Percentage to CGPA — Reverse the conversion for university applications that require CGPA
- SGPA to CGPA — Aggregate multiple semester GPAs with credit weighting to get your overall CGPA
- Grade Calculator — Enter subject-wise marks and weightage to calculate your final semester grade
Electronics Calculators for ECE and EEE Students
Our electronics tools are designed for students in Electrical, Electronics and Communication, and related branches. The Ohm's Law Calculator lets you solve for voltage, current, or resistance given the other two. The Resistor Color Code Calculator decodes 4-band and 5-band resistors instantly — type in the colors or the value, and get the answer either way.
- Ohm's Law Calculator — V = IR, solve for any unknown
- Resistor Calculator — Decode color bands to find resistance and tolerance
Mathematics Tools for Engineering Core Subjects
Matrix operations appear across multiple engineering subjects — Linear Algebra, Control Systems, Network Theory, and more. Our Matrix Solver handles addition, subtraction, multiplication, determinant, transpose, and inverse — showing you the working step-by-step so you understand the process, not just the result. The Linear Interpolation Calculator is essential for finding intermediate values in thermodynamic tables, material property charts, and data sets.
Finance Calculators for Smart Student Decisions
Engineering education in India often involves education loans, and your first job brings financial decisions you may never have faced before. Our finance tools help you make informed decisions:
- EMI Calculator — Know your monthly payment for any loan amount, rate, and tenure
- Loan Amortization Planner — See the full month-by-month schedule of principal vs. interest payments
- Compound Interest Calculator — Understand how investments and savings grow over time
- Simple Interest Calculator — Fast calculation using the P×R×T/100 formula
Image Tools for College and Job Applications
Almost every college portal, university application, and job application site has strict image requirements — specific pixel dimensions, maximum file sizes, or required formats. Our image tools solve all of this:
- Image Resizer — Resize to exact pixel dimensions for passport photos, ID uploads, and form submissions
- Image Compressor — Reduce file size under portal limits without visible quality loss
- Image Format Converter — Convert JPG, PNG, WEBP, and other formats to match portal requirements
Career Tools — Placement and Gap Year
Our Placement Eligibility Checker helps you verify whether your CGPA, attendance record, and academic backlog status meets the criteria for your college's placement drive. Our Gap Calculator helps you quantify and clearly present any gap year or break in your academic record for resume preparation, visa applications, and interviews.
Number System Converter for CS Students
Computer Science and IT students frequently need to convert between Binary, Octal, Decimal, and Hexadecimal number systems — for digital electronics, microprocessor subjects, and coding interviews. Our Number System Converter handles all four systems simultaneously, showing the converted value in all formats at once.
Common Questions
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