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
41 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.
Helium Authority Guide
Professional resource for helium tanks, cryogenic cooling, and balloon lift estimation with interactive atomic models.
Ammonia & Ammonium Guide
Comprehensive NH₃ vs NH₄⁺ resource covering safe bleach handling, concentration calculators, and industrial applications.
Hydrogen & Hydrogen Peroxide
Master hydrogen bonding, H2O2 safe uses (ear, mouthwash), and fuel cell energy mechanics with interactive simulators.
Chlorine & Chloride Guide
Definitive resource for pool chlorine dosage, chemical interaction safety, and medical chloride lab interpretation.
Lithium Battery & Medical Guide
Comprehensive hub for Li-ion battery capacity calculators, medical dosage safety visualization, and EV mining economics.
Beryllium Authority Guide
Interactive atomic structure, Bohr models, electron configuration generators, and aerospace material comparisons for Element 4.
Boron Chemical & Health Guide
Comprehensive resource exploring Boron: valence electrons, industrial tri-fluoride compounds, and medical dietary supplements.
Carbon (C) Authority Hub
Deep dive into valence electrons, the carbon cycle, CO₂/CO safety, nanotechnology, and graphite/diamond material science.
Aluminum (Al) Engineering Hub
15,000+ word resource on the Hall-Héroult process, aerospace alloys (1xxx-7xxx), foil safety, and recycling economics.
Silicon (Si) Tech Hub
The foundation of the digital age: semiconductor physics, Doping Simulator, Apple Silicon history, and Silicon Valley culture.
Magnesium (Mg) Health Guide
Global authority on Mg compounds (glycinate, citrate), dietary supplements, photosynthesis role, and industrial metallurgy.
Sodium (Na) Industrial Hub
Electrolyte balance, NaCl salt economics, industrial extraction, and interactive sodium-potassium pump visualizations.
Nitrogen (N) Atmosphere Hub
Master the Nitrogen cycle, Haber-Bosch process, fertilizers, explosives safety, and the physics of liquid nitrogen.
Oxygen (O) Respiratory Hub
Master diatomic O₂, photosynthesis mechanics, medical oxygen safety, and orbital mechanics of atmospheric oxidation.
Neon (Ne) & Noble Gas Hub
Physics of neon lighting, electron shells, fractional distillation, and the high-tech uses of cryogenic noble gases.
Fluorine (F) & Dental Safety
The most electronegative element: Teflon chemistry, toothpaste fluoride safety, and the industrial production of F₂ gas.
Phosphorus (P) Global Hub
Everything from Hennig Brand's discovery to DNA/ATP biochemistry, renal diet management, and the phosphorus cycle.
Electronic Configuration Hub
Comprehensive 118-element database with Bohr models, Aufbau principle simulators, and interactive orbital diagrams.
Electronegativity Hub & Chart
Interactive Pauling scale heatmap, bond polarity predictor, and 18,000+ word deep-dive into all 118 elements.
Electronegativity Trends
Learn exactly why electronegativity increases across periods and decreases down groups with visual physics-based simulations.
Argon (Ar) Noble Gas Guide
Deep dive into Element 18: inert gas welding shielding, incandescent bulb mechanics, and planetary atmospheric geology.
Calcium (Ca) Authority Hub
Educational and utility hub covering bone density, cement industrial chemistry, and reactive alkaline earth metal properties.
Sulfur (S) Authority Hub
Global authority on the Frasch process, sulfuric acid economics, volcanology, and vulcanized rubber chemistry.
Potassium (K) Health Guide
Global authority on Potassium: cellular electrolytes, explosive water reactions, and agricultural potash fertilization.
Oxidation States Explorer
Master oxidation rules, calculate states instantly, and deep-dive into every element's redox behavior.
Chemistry Problem Solver
Step-by-step interactive guidance for balancing equations, molar mass, valence electrons, and electron configuration.
Bohr Shell Visualizer
Interactive animated 2D representations of all 118 elements and their physical electron shell distributions.
SPDF Orbital Mechanics
Comprehensive guide covering advanced quantum 3D mechanics and specific spdf energy levels.
Valence Electrons Hub
Quickly find and understand the most reactive outer-shell electrons for every element mathematically.
Atomic Radius Explorer
Interactive scatter plots mapping periodic size trends, Slater shielding rules, and 118-element directory.
Molecular Structure Visualizer
Build and visualize 3D molecular geometries, VSEPR shapes, bond angles, and polarity for any compound.
Atomic Structure Explorer
Visualize proton, neutron, and electron arrangement for all 118 elements with interactive Bohr diagrams.
Electronegativity Chart
Full periodic table electronegativity heatmap with Pauling, Mulliken, and Allen scale comparisons.
ICT & Developer Tools
3 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.
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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