Free Online Tools &
Calculators
Interactive tools for chemistry, science education, ICT, and daily life — 100% free, no sign-up required. Built by Toni Tech Solution, Rwanda.
Chemistry & Science
9 tools available
pH & Buffer Calculator
Convert between pH, pOH, and ion concentrations. Includes Henderson-Hasselbalch buffer calculator and titration curves.
Ideal Gas Law Calculator
Solve PV=nRT for pressure, volume, temperature, and moles. Covers Boyle's, Charles's, and Avogadro's laws with visual maps.
Chemical Reaction Calculator
Analyze chemical equations, identify reaction types (synthesis, combustion, decomposition), and get plain-English explanations.
Interactive Periodic Table
Explore all 118 elements with symbols, atomic mass, electron configuration, and charges. Features Quiz Mode and PDF export.
Dilution Calculator
Solve C₁V₁=C₂V₂ and generate serial dilution tables for laboratory chemistry, pharmacy, and essential oils.
Hydrocarbon Guide & Generator
Name alkanes, alkenes, alkynes, and aromatics. Interactive IUPAC naming with 3D structure visualizations.
Chain Reaction Explorer
Simulate nuclear fission and free radical halogenation. Visualize initiation, propagation, and termination steps interactively.
Exothermic vs Endothermic
Complete guide comparing reaction types with energy graphs, Enthalpy (ΔH) equations, and real-world examples.
Ammonia & Ammonium Guide
Comprehensive NH₃ vs NH₄⁺ resource covering safe bleach handling, concentration calculators, and industrial applications.
ICT & Developer Tools
6 tools available
Free QR Code Generator
Generate high-resolution QR codes for URLs, WiFi networks, and WhatsApp contacts instantly. No signup required.
Color Code Generator & Finder
Convert and find any color between HEX, RGB, HSL, and CMYK formats. Visual color picker built for designers and developers.
My Screen Resolution
Instantly detect your exact display dimensions, viewport size, device pixel ratio, and browser window measurements.
Viewport Checker
Test your website's responsive breakpoints across different viewport sizes in real time.
Device Info Tool
See detailed information about your device including OS, browser, screen specs, and connection type.
Screen Size Simulator
Preview how your website looks at different standard screen resolutions — from mobile to 4K desktop.
Daily Life Calculators
2 tools available
Age Calculator
Calculate your exact age in years, months, and days. Includes live countdown, zodiac sign, birthday countdown, pet age converter, retirement planner, heart age, and gestational calculator.
Catalytic Converter Calculator
Compute exhaust replacement costs, diagnose vehicle symptoms, evaluate scrap metal pricing, and understand catalytic converter theft risks.
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Software Solution?
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