ToolMatrix: The Universal Hub for Calculators, Converters, and Expert Tools
Your go-to platform for free, client-side tools, metrics, and insights—helping creators, finance professionals, students, and engineers solve complex problems instantly.
Unlock powerful metrics and technical insights. We provide a comprehensive suite of free, high-performance tools for financial planning, compliance, academic conversions, and digital productivity.
Our Core Expertise: Specialized Calculators and Authority Content
ToolMatrix builds authority through three pillars: Financial Precision, Specialized Utility, and Expert Content.
Financial & Health Metrics
High-precision calculators for financial independence planning, mortgage amortization, and key health indicators.
Technical & Compliance Utility
Specialized converters and calculators for engineering, tax compliance, and academic standards.
Expert Guides & Insights
In-depth articles and guides that explain complex topics and help you leverage our tools effectively.
Discover Our Top-Rated Calculators and Converters
Powerful, free, and easy-to-use solutions to enhance your productivity.
Mortgage & Loan Calculator
Estimate your monthly payment, total interest, and loan amortization schedule for home loans and auto loans.
Global GPA/CGPA Calculator
Convert your CGPA to percentage (e.g., 9.5 scale) and calculate Cumulative GPA for university and job applications worldwide.
CGPA to Percentage Calculator
Instantly convert your CGPA to a percentage based on your university's grading scale, supporting global standards.
Financial Independence (FIRE) Calculator
Determine your Financial Independence Number and retirement date planner based on the 4% Rule and your current savings rate.
Business ROI Calculator
Calculate SEO ROI and general business profitability by factoring conversion rates and average order value.
Universal Percentage Calculator
Quickly solve common problems like percentage increase, discount percentage, and what is X% of Y for shopping and finance.
Sales Tax Nexus Calculator
Quickly identify your economic nexus obligations across all US states to ensure e-commerce tax compliance and mitigate risk.
Engineering Unit Converter
Convert highly specialized units in Thermal Conductivity and Fluid Dynamics, providing high-precision unit conversion for professionals.
BMI (Body Mass Index) Calculator
Determine your Body Mass Index and assess your healthy weight range for adults, with important notes on BMI formula limitations.
Daily Calorie Needs Calculator
Use the accurate Mifflin-St Jeor equation to calculate your TDEE (Total Daily Energy Expenditure) and calories for weight loss.
Pregnancy Due-Date Calculator
Calculate your estimated delivery date (EDD) using your last menstrual period (LMP) and track key pregnancy milestones.
Universal QR Code Generator
Create free static QR codes instantly for vCard, WiFi access, and URLs, with options for custom colors and high print quality.
Universal Image Converter
Convert images to PNG for transparent backgrounds, Webp for website speed, or SVG for unlimited scaling in high quality.
ChatGPT Prompt Library
Boost your productivity with our curated list of ChatGPT prompts — categorized and tested for blogging, marketing, coding, and more.