⚡ 100% Client-Side · Private · Zero Sign-Up

Free Online Tools & Calculators

High-precision browser tools for exam preparation, AI hardware sizing, financial planning, design measurement, and everyday developer productivity.

Exam & Study Productivity Utilities

Official Exam Replica

TCS iON GATE Virtual Calculator Simulator

Master the exact on-screen virtual calculator used in the official GATE CBT exam. Practice mouse-only calculations in Exam Mode to prevent costly calculation mistakes.

Authentic scientific keypad layout: trig, log, exp, brackets
Degree vs Radian mode toggle & memory keys (MC, MR, M+, M-)
Strict Exam Mode: keyboard banned to simulate real exam conditions

Practice GATE Calculator →

100% Private Browser

NTA JEE, NEET & GATE Photo Resizer

Resize, crop, and compress passport photos (3.5×4.5 cm, 20KB-50KB) and signatures (10KB-30KB) for NTA, GATE, UPSC, and SSC applications with zero server upload.

Official NTA JEE Main, NEET UG, and GATE exact presets
Binary search JPEG compressor targeting exact file size in KB
Optional 'Name & Date of Photo' (DOP) label stamper

Resize Exam Photos →

2,184 Real PYQs

GATE CBT Exam Simulator Suite

Full 7-year authentic GATE exam question bank (2018-2024) across ECE, CSE, EE, MECH, and CIVIL with real-time test timer, question palette, and negative marking analytics.

5 Engineering Branches: ECE, CSE, EE, MECH, CIVIL
Authentic question palette: Not Visited, Marked for Review
Concealed practice mode + Negative Marking Mistake Books

Launch CBT Simulator →

High-Precision Screen & Display Utilities

1:1 Physical Scale

Online Screen Ruler & Calibrator

True 1:1 physical scale ruler in centimeters (cm), millimeters (mm), inches (in), and pixels (px). Calibrate with any credit card or screen size preset.

Universal credit card calibration (ISO/IEC 7810 ID-1 standard)
Zero-origin draggable caliper pins with live decimal readout
Horizontal & vertical orientations + full-screen measurement mode

Open Online Ruler →

Aspect Ratio & Screen PPI / DPI Calculator

Instantly calculate and simplify aspect ratios (16:9, 4:3, 21:9, 9:16), resize dimensions proportionally, and compute screen pixel density (PPI/DPI).

Interactive live viewport preview box & CSS snippet generator
Presets: 4K UHD, 1440p QHD, 1080p FHD, Ultrawide, Mobile
Screen DPI/PPI, diagonal inches, and dot-pitch analyzer

Calculate Aspect Ratio →

Image Color Picker & Hex Eyedropper

Pick colors directly from uploaded images or clipboard with pixel loupe magnifier. Extract harmonic 6-color palettes and check WCAG contrast.

Instant 1-click copy for HEX, RGB, HSL, and CMYK values
Interactive pixel magnifier loupe with crosshair precision
Automatic dominant palette extraction & WCAG contrast ratios

Pick Colors from Image →

AI & Local LLM Hardware Sizing Calculators

LLM VRAM & Quantization Calculator

Compute exact GPU memory for weights, KV cache, and CUDA overhead for DeepSeek R1, Qwen 2.5 Coder, Llama 3.3, and Gemma 2.

Dynamic KV cache sizing at 4K to 128K context
Precise GGUF quantizations (Q3, Q4_K_M, Q5, Q8)
Estimated generation speeds (tokens/second)

Open VRAM Sizer →

Ollama Hardware & Layer Offloader

Calculate exact layer splits between GPU VRAM and DDR5 system RAM to maximize tokens/sec without crashing on out-of-memory (OOM).

Optimal layer offload splits for 6GB, 8GB, 12GB GPUs
1-Click direct Ollama CLI run commands
FlashAttention memory footprint savings

Calculate Layer Offload →

DeepSeek-R1 Hardware Sizer

Specialized requirements for DeepSeek-R1 Full (671B MoE) and Distilled models (1.5B to 70B) across consumer hardware and Macs.

MoE active vs total parameter RAM overhead
Multi-GPU and unified memory configurations
Reasoning trace context window scaling

Size DeepSeek-R1 →

AI Token Cost & API vs Local ROI

Compare cloud API pricing across Claude 3.5 Sonnet, GPT-4o, and DeepSeek-V3 against the break-even cost of owning your own GPU.

Live pricing per million input/output tokens
Electricity vs cloud token financial models
Break-even ROI time horizon simulator

Simulate Token Costs →

Indian Govt Exam & Application Form Resizers

Government Forms Resizer Suite 17 OFFICIAL PRESETS

All-in-one suite with dedicated dimension and file size presets for SSC, UPSC OTR, RRB, IBPS Bank, NEET UG, JEE Main, and Passport forms.

Photo Resizer 20KB to 50KB

Compress passport photo strictly to 20KB–50KB (3.5 × 4.5 cm) for national entrance and exam forms.

Signature Resizer 10KB to 20KB

Strict 10KB–20KB compression for online application signatures with white background contrast enhancement.

SSC CGL / CHSL / MTS Resizer

Exact dimensions (100x120px photo, 140x60px signature) compliant with SSC recruitment portal guidelines.

UPSC OTR Photo Resizer

Official UPSC One-Time Registration specs: 350x350px, 20KB-300KB, with clear face guidelines.

Bank IBPS / SBI PO Resizer

Resize photo (20KB-50KB), signature (10KB-20KB), and left thumb impression for bank recruitment exams.

Railway RRB ALP / NTPC Resizer

Official specs for Railway Recruitment Board application photos and document uploads.

Financial & Investment Calculators

SIP & Step-Up Calculator

Compute mutual fund SIP wealth creation with yearly step-up contribution increments and inflation adjustments.

GST Calculator (Inclusive / Exclusive)

Calculate Indian GST tax amounts across 5%, 12%, 18%, and 28% brackets with CGST and SGST breakdowns.

Income Tax Calculator (Old vs New)

Compare tax liabilities under Old vs New Tax Regime with standard deduction and 80C/80D benefits.

Loan / EMI Calculator

Compute home loan, car loan, and personal loan EMIs with total interest paid and amortization schedule.

HRA Exemption Calculator

Calculate exact House Rent Allowance tax exemption under Section 10(13A) for metro vs non-metro cities.

Gratuity Calculator (15/26 Rule)

Compute retirement or resignation gratuity payout based on the Payment of Gratuity Act formula.

PPF Calculator (Public Provident Fund)

Calculate 15-year PPF maturity value, government interest accrual, and tax-free returns.

NPS Pension Calculator

Estimate National Pension System retirement corpus and monthly annuity pension payouts.

Text, Writing & Language Utilities

Word Counter & Reading Time

Real-time word, character, sentence, paragraph counts and estimated reading & speaking times.

English to Hindi Typing (Phonetic)

Type Hindi effortlessly using standard English keyboard transliteration (e.g., 'namaste' → 'नमस्ते').

Kruti Dev to Unicode Font Converter

Convert legacy Kruti Dev Hindi text to modern Mangal/Unicode fonts and vice-versa in real time.

Switch text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.

Fancy Text Generator

Generate stylish Unicode fonts, bold/italic text, and decorative lettering for social media.

Text to URL Slug Converter

Convert blog headlines and product titles into clean, SEO-friendly URL slugs.

Remove Duplicate Lines

Clean messy text and code lists by removing duplicate entries, trimming whitespace, and sorting lines.

Minimalist, distraction-free browser scratchpad with auto-save to localStorage. Never lose notes.

Everyday & Health Calculators

Calculate exact age in years, months, weeks, days, hours, and minutes with upcoming birthday countdown.

BMI Calculator (Body Mass Index)

Calculate your BMI with WHO category charts (Underweight, Normal, Overweight, Obese) and healthy range.

Percentage Calculator

Solve percentage increase/decrease, percentage difference, and fraction to percent conversions.

Days Between Dates

Calculate exact calendar days, working business days, and weeks between any two dates.

Hours & Work Time Calculator

Calculate total hours worked from start and end times with automatic lunch break subtraction.

Calorie & BMR Calculator

Estimate basal metabolic rate and daily calorie needs for weight maintenance, loss, or muscle gain.

Daily Water Intake Calculator

Calculate recommended daily hydration volume based on body weight, climate, and exercise level.

Ideal Body Weight Calculator

Compare healthy body weight estimates across Robinson, Miller, Devine, and Hamwi formulas.

Developer, Media & Audio Utilities

QR Code Generator

Generate crisp, customizable QR codes for URLs, WiFi passwords, vCards, text, and WhatsApp messages.

Microphone Sound Test

Test microphone input, live frequency waveform visualizer, and record playback directly in browser.

CPS Click Speed Test

Test your clicks per second over 1s, 5s, 10s, and 60s intervals with high-precision gaming timer.

Coin Flip & Dice Roller

Cryptographically random heads/tails coin flipper and multi-sided dice roller (d4, d6, d8, d12, d20).

JSON Formatter & Validator

Prettify, validate, minify, and inspect JSON payloads with line-by-line syntax error highlighting.

Secure Password Generator

Generate cryptographically secure, high-entropy passwords with custom length and symbol options.

MD5 & SHA Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic checksums instantly in your browser.

URL Encoder / Decoder

Encode strings into percent-encoded URI components or decode raw query parameters safely.

Universal Unit Converter

Convert between metric and imperial units: length, weight, volume, temperature, and area.

Timer & Stopwatch with Laps

Precision millisecond stopwatch with split lap times and customizable countdown interval alarm.

World Time Zone Converter

Compare local times across UTC, EST, PST, GMT, IST, and JST with meeting scheduler planner.

Unix Timestamp Converter

Convert epoch seconds/milliseconds into human-readable ISO 8601 dates and vice-versa.

GPU Hardware & Local AI Architecture Matrix

GeForce RTX 4090

24GB GDDR6X • 1008 GB/s

Runs 32B models unquantized and 70B models at Q3_K_M with extreme throughput.

GeForce RTX 4080 Laptop

12GB GDDR6 • 432 GB/s

High-end mobile workstation for 14B coding models and 8B at full 32K context.

GeForce RTX 4070 Laptop

8GB GDDR6 • 256 GB/s

Fast inference for 8B models and Q3 quants of Qwen 2.5 Coder 14B with offload.

GeForce RTX 4060 Laptop

8GB GDDR6 • 256 GB/s

The developer sweet spot: runs Qwen 2.5 Coder 14B at 38 tok/s using Q3_K_M.

GeForce RTX 3060 Desktop

12GB GDDR6 • 360 GB/s

Budget desktop champion for 14B local models and full FP16 8B agents.

GeForce RTX 3060 Laptop

6GB GDDR6 • 336 GB/s

Reliable baseline for Llama 3 8B at Q4_K_S and Phi-4 14B with system RAM offload.

Apple Silicon (M1-M4)

16GB – 128GB Unified Memory

Run massive 70B and 671B MoE models directly in unified RAM without clustering.

Explore Full Matrix →

View all benchmarks and memory bandwidth analysis

Comprehensive Technical Guides & Documentation

Competitive Exams

Mastering the GATE CBT Exam Interface & TCS iON Calculator

The complete strategic guide to the official GATE virtual calculator, scratchpad optimization, and eliminating negative marking slips.

Form Guidelines

NTA JEE Main & NEET Photo & Signature Guidelines 2026

Exact dimension requirements (10KB–50KB), background specifications, and zero-rejection application form guidelines.

The Ultimate Digital Toolkit for Competitive Exam Aspirants

Discover the top digital tools used by engineering and medical aspirants: virtual calculators, screen rulers, and CBT simulators.

Can 8GB VRAM Run Qwen 2.5 Coder 14B Locally?

Empirical benchmarks, GGUF quantization layer splits, and performance tests on mobile RTX 4060 GPUs.

Run DeepSeek-R1 Locally: Complete Hardware & VRAM Guide

Hardware sizing from 1.5B distill to full 671B MoE. CPU vs GPU offloading and quantized model performance.

Old vs New Tax Regime: Which One Saves More Tax in 2026?

Complete comparison with deduction limits, salary brackets, and calculation formulas for Indian taxpayers.