Aspect Ratio Calculator
Calculate and simplify aspect ratios instantly. Perfect for filmmakers, designers, and developers needing precise dimensions for video, images, or responsive layouts.
Blood Pressure Tracker
Track and analyze your blood pressure readings with automatic categorization, trend analysis, and weekly reports. Free health monitoring tool with data export.
BMI Calculator Plus
Calculate Body Mass Index with visual feedback, ideal weight ranges, and unit conversion. Enhanced health monitoring with color-coded results.
Compound Interest Calculator
Project investment growth with compound interest calculations including regular contributions and timeline visualization for retirement and financial planning.
Currency Converter
Convert between 150+ world currencies using real-time exchange rates. Live financial data with historical charts and favorite pairs for international transactions.
Date Calculator
Calculate days, weeks, months between dates; add/subtract time periods; compute age with professional date arithmetic for project planning.
Decision Matrix Calculator
Make better decisions with multi-criteria analysis. Professional decision matrix calculator with weighted scoring, comparison tables, and detailed analysis reports.
Health & Fitness Calculators
Calculate daily calorie needs, ideal weight, and water intake based on personal metrics. Comprehensive health planning with activity level adjustments.
Linear Regression Calculator
Calculate linear regression models from your data points. Free online tool with real-time predictions, visualizations, and statistics for machine learning enthusiasts.
Loan & Mortgage Calculator
Calculate monthly mortgage payments, total interest, and complete amortization schedules. Compare loans with extra payment scenarios for informed financial decisions.
Math Calculators
Comprehensive mathematics toolkit including scientific, fraction, geometry, and prime calculators with advanced functions for education and engineering.
Percentage Calculator (General)
Calculate comprehensive percentages including increases, decreases, and proportions with step-by-step explanations for business and education.
Road Trip Planner & Speed Calculator
Plan routes on an interactive map, calculate driving ranges, and compare speed scenarios.
Time Series Anomaly Detector
Detect anomalies and outliers in time series data using statistical methods. Free online tool with Z-score, IQR, and moving average detection algorithms.
Timezone Converter
Compare times across multiple zones with automatic daylight saving adjustments. Perfect for international meetings and global team coordination.
Timezone Converter with DST
Convert between timezones with automatic DST handling. Compare multiple timezones, plan international meetings, and track daylight saving time transitions worldwide.
Ultimate Timer & Stopwatch
Beautiful timer and stopwatch with 4 visual styles: Pomodoro, Analog Clock, Digital Display, Multi-Timer. Keyboard shortcuts, notifications, and focus tracking.
Unit Converter
Convert between measurement units including length, weight, temperature, volume, and more. Support for metric and imperial systems with precision.
Unit Converter (Extended)
Convert between 11+ unit categories including length, weight, volume, temperature, and more with scientific precision for engineering applications.
VAT Calculator
Calculate European VAT amounts (0%, 9%, 21%) instantly from net to gross or vice versa. Essential business tool for entrepreneurs with batch processing support.
Video Duration Calculator
Calculate video duration from frames, frame count from duration, convert timecodes, and solve time-lapse calculations. Essential for video professionals.
Web & Dev Calculators
Developer calculator suite with subnet calculator, CSS easing functions, calc() builder, and reading time estimator. Essential tools for web development and network engineering.