Free online calculators for math, finance, health, science, and everyday life — instant, accurate, and built for desktop and mobile.
Convert between gold karats, purity percentage, touch, tunch, and 916/750/585/375 hallmark markings. Free online gold karat calculator and purity converter.
Calculate your exact age in years, months, days, hours, minutes, and seconds — free online age calculator with leap-year and timezone support.
Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Free online temperature converter with live four-way conversion and precision controls.
Calculate your BMI (Body Mass Index) instantly. Free online BMI calculator with metric and imperial units — find your healthy weight range.
Calculate discount amount, savings, and final price from any percent-off offer. Free online discount calculator — perfect for shopping, sales, and pricing.
Calculate compound interest and total amount with adjustable compounding frequency (annual to daily). Free online compound interest calculator using A = P(1 + r/n)^(nt).
Calculate simple interest and total amount instantly using the SI = (P×R×T) / 100 formula. Free online simple interest calculator for loans, deposits, and study.
Calculate the exact number of days, weeks, months, and years between any two dates instantly. Free online date difference calculator — perfect for project planning and milestones.
Calculate percentages three ways: what is X% of Y, X is what percent of Y, and percent change from X to Y. Free online percentage calculator with instant results.
Calculate tip amount, total bill, and per-person split instantly. Free online tip calculator with quick 10/15/20/25% buttons — perfect for restaurants and group dining.
Tooloogle's calculators give you fast, reliable answers to the math problems you run into every day — from simple arithmetic to complex financial planning, health tracking, and scientific computation. Every calculator runs entirely in your browser, so your inputs never leave your device, and there's no app to install or account to create.
Our growing library of online calculators is organised around the questions people actually ask. Whether you're a student verifying homework, a homeowner estimating loan payments, a developer benchmarking percentages, or a fitness enthusiast tracking macros, you'll find a focused tool here that does exactly one job and does it well.
Plan your money with EMI calculators, compound interest calculators, mortgage and home-loan estimators, simple interest tools, GST and VAT calculators, currency conversion helpers, retirement planning calculators, and SIP/lump-sum investment projection tools. Make smarter borrowing, saving, and investing decisions before you commit a single rupee or dollar.
Solve percentages, ratios, fractions, square roots, exponents, logarithms, and quadratic equations in seconds. Our scientific calculator handles trigonometry, factorials, and complex number operations, while the equation solver shows step-by-step working so you can learn as you compute.
Track BMI, BMR, ideal body weight, body fat percentage, daily calorie requirements, water intake, pregnancy due dates, ovulation windows, and target heart-rate zones. These tools turn medical formulas into one-click answers — perfect for personal wellness journeys and professional clients alike.
Compute exact age in years, months, days, and seconds; find the difference between two dates; add or subtract business days; calculate countdown timers to upcoming events; and convert work hours into minutes or decimal hours for invoicing.
Convert temperatures, weights, lengths, areas, volumes, fuel economy, data sizes, and energy units between metric and imperial systems with full precision and rounded display options.
Spreadsheets are powerful but slow to set up. Phone calculators are quick but limited. Tooloogle calculators sit in the sweet spot: purpose-built tools for specific problems, with clearly labelled fields, contextual help, and shareable results. You don't have to remember formulas, format cells, or worry about hidden errors — the math is verified, the rounding is transparent, and every output is copy-ready.
All calculations happen client-side in JavaScript. We never send your salary, medical data, loan details, or personal numbers to a server. Close the tab and the data is gone.
Every calculator is designed touch-first, with large input fields, numeric keyboards on mobile, and responsive layouts that work equally well on phones, tablets, and desktops. Use them in the queue, in a meeting, or at the kitchen table.
No subscriptions, no paywalls, no usage limits, no signup. Tooloogle calculators are free for personal and commercial use — students, freelancers, accountants, fitness coaches, teachers, and small business owners all use them daily.
Students preparing for exams use our math and science calculators to check homework. Personal-finance enthusiasts model loan repayments and SIP returns before talking to a bank. Fitness coaches calculate macros for clients. Teachers build worksheets and demo problems live in class. Developers and engineers prototype unit conversions for their own apps. Homemakers plan budgets, recipes, and travel costs.
Use the same units throughout a calculation (don't mix kilograms and pounds), double-check decimal separators if you switch between locales, and read the small print under each calculator — many include assumptions (interest compounding frequency, tax bracket, age category) that affect the result. When in doubt, the help text under each field explains exactly what's expected.
Explore the calculators below to find the right one for your situation. Bookmark your favourites for one-click access next time, and share results with colleagues or clients via the built-in copy and download buttons.