iCalculators.org — Calculate · Analyze · Plan

    Free calculators, converters & formula tools

    Precise tools for math, science, and real life

    iCalculators brings together scientific calculators, chemistry solvers, unit conversion, and practical finance utilities—organized for students, teachers, and professionals who care about clear methodology.

    Browse the full catalogJump to unit conversion

    Use the language menu in the header to switch catalog language. Browse the directory.

    Popular calculators

    High-traffic tools visitors rely on for coursework, household planning, and professional estimates—each page explains the math so you can audit the result.

    See every category in the interactive directory or explore financial, health and utility hubs.

    Popular converters

    Unit conversion is often the first step before a formula. These tools emphasize consistent prefixes, readable rounding, and quick copy-out for labs and spreadsheets.

    Physics formulas & physical science

    Start from classical gas relationships and motion, then branch into thermodynamics expressions that show up in both physics and chemistry courses. Each link lands on a focused page with definitional reminders.

    Mathematics & statistics

    Start with the free basic calculator for everyday arithmetic, then move from algebra through calculus and linear algebra—the math hub collects step-friendly solvers alongside statistics utilities for coursework and data fluency.

    Deep dive: browse the full math & science category.

    Chemistry calculators

    Solution chemistry, stoichiometry, and acid–base reasoning are easier when molar quantities and unit conversions stay organized. These entry points mirror how general chemistry syllabi progress.

    Continue to the complete chemistry catalog.

    Educational content & school tools

    GPA planners, graphing utilities, and exam-prep calculators help you sanity-check hand calculations and teach the “why” behind each step.

    Why educators and teams choose iCalculators

    The goal is simple: ship fast pages that respect your time, show the reasoning behind each formula, and connect related tools so you can move from question to answer without tab overload.

    • Built for clarity, not clutter

      Each tool focuses on a specific task—inputs, assumptions, and outputs stay easy to scan on a phone or laptop.

    • STEM-first organization

      Math, chemistry, and physics formulas are grouped the way courses introduce them, so you spend less time hunting.

    • Practical finance and health context

      Loan, tax, and wellness calculators include the framing students and professionals actually need for decisions.

    • Fast, static-friendly pages

      The experience is tuned for quick loads and readable layout—helpful for classrooms, labs, and remote work alike.

    Explore major sections

    About iCalculators. We publish transparent methodology notes alongside interactive utilities. About iCalculators · full tool directory for the complete sitemap-style experience.

    How we build trustworthy calculators

    Every tool explains its formula, typical use cases, and edge-case limits. Editorial teams review updates when standards, tax rules, or clinical guidelines change.

    Written byiCalculators Editorial TeamReviewed byiCalculators Technical Review Board

    Calculator pages document formulas, inputs, and known limitations. Health and financial results are educational — confirm with qualified professionals before making decisions.

    About iCalculators.

    iCalculators is a free catalog of browser calculators—finance, health, STEM, construction, utilities, and school tools. Pages load quickly, show the formula, and keep results easy to read so you can check a number without guessing how it was made.
    Comparing a mortgage, finishing chemistry homework, converting units on site, or graphing for class? Jump in from a category hub or open the full directory and pick the tool that matches the job.

    Why people keep coming back

    We keep each page focused: one main job, a short explanation, and links to the next calculator when the problem needs more than one step.
    • Runs in the browser—no install on desktop or phone
    • Benefits, facts, and FAQs sit next to the calculator, not buried elsewhere
    • Catalog routes in multiple languages for students and working pros
    • New tools keep landing across finance, health, math, and trades

    Frequently asked questions

    Straight answers about accuracy, accounts, and how to navigate physics and chemistry topics on iCalculators.

    iCalculators is a large, free directory of online calculators, unit converters, and formula-driven tools for math, science, finance, health, and everyday tasks. You can jump straight to a specific tool or browse curated category hubs.

    Tools use standard formulas and well-known numerical methods, and pages call out inputs and assumptions. For medical, legal, or financial decisions, always confirm results with a qualified professional and your local regulations.

    No. The core calculators and converters are available without sign-up so you can complete homework, estimates, and quick checks without friction.

    Converters prioritize predictable rounding for classroom and field use. If you need exact symbolic fractions or full precision for research, export values and continue in your preferred CAS or spreadsheet.

    Begin with the gas laws and motion tools, then explore thermodynamics and chemistry-adjacent pages for energy and equilibrium concepts. Each hub links to related calculators so you can move from theory to practice.

    Yes. The calculators and converters on this site are free to use in the browser. Some pages include optional context, examples, and links to related tools to help you learn the underlying formula.

    Yes. Use the contact channels listed on the About page to propose tools or report formula issues.

    Ready for your next calculation?

    Pick a category hub, bookmark the tools you reuse, and share pages with students or teammates who need dependable STEM utilities without installing software.

    Open the directoryStart with mathematics