The most complete free calculator platform — standard & scientific math, live currency & crypto rates, BMI, loan EMI, GPA, investment returns, unit conversion and 30+ more tools. All run in your browser. Zero data collected.
Are you ready to challenge your brain? Try our 10-Question Math & General Knowledge IQ Test. This test is designed using globally accepted psychometric standards including time constraints and standard bell curve score distribution.
Browse our complete suite of 40 free calculator tools below. Click any calculator to open instantly with full interactive features, worked guides, and zero data tracking.
Full arithmetic with memory, history & keyboard shortcuts
30+ functions: trigonometry, logarithms, powers, factorial & constants
Calculate percentage change, find X% of Y, discounts & shifts
Simplify ratios, solve proportions & scaling factors
Add, subtract, multiply, divide & simplify fractions
Solve ax² + bx + c = 0 with real/complex roots and discriminant
Mean, median, mode, standard deviation & variance calculation
2×2 matrix addition, subtraction, multiplication & determinants
Convert standard Arabic numbers (1–3999) to Roman numerals
Convert Binary, Octal, Decimal, Hex & Base-36 simultaneously
200+ conversions for length, weight, volume, temperature & speed
Live global currency exchange rates via European Central Bank
Live real-time prices & conversions for 40+ cryptocurrencies
Convert HEX, RGB & HSL colors with real-time palette preview
Compare and convert time across 20+ major global time zones
Binary math & bitwise logic operations (AND, OR, XOR, NOT)
Monthly EMI installments, amortization & total interest breakdown
Compound interest growth, SIP projections & annualized CAGR
Home loan monthly payments, property taxes, PMI & insurance
Sale prices, percentage markdowns & double discount savings
Compute GST, VAT, and sales tax add-on or extract amounts
Restaurant tipping, custom percentage & per-person bill split
Calculate in-hand monthly take-home pay after PF, PT & taxes
Plan your required retirement nest egg corpus and withdrawals
Body Mass Index screening with WHO weight classification ranges
Daily maintenance calories, BMR & calorie deficit for fat loss
Personalized daily hydration recommendations by body weight & activity
Estimate delivery date, gestational age & trimester timeline
Exact age in years, months, days, hours, and next birthday
Days, weeks, and months elapsed between any two calendar dates
Solve velocity, travel duration & distance in metric or imperial
Trip fuel expenses, mileage, total consumption & cost per passenger
Semester & cumulative GPA calculation on a 4.0 weighted scale
Weighted assignment grades & score needed on final exam
Calculate voltage (V), current (I), resistance (R) & electrical power (P)
2D surface areas & 3D geometric volumes for geometric shapes
Solve right and oblique triangles with Pythagorean theorem
Random integers, floats, dice rolls, coin flips & UUID generation
Cryptographically secure passwords with custom entropy & characters
Word counter, character count, uppercase/lowercase & text reversals
Purpose-built tools with live data feeds, professional-grade formulas, and a design that gets out of your way.
The currency converter fetches real-time rates from the European Central Bank via Frankfurter API (no key required) with automatic fallback to the fawazahmed0 CDN. Crypto prices are live from CoinGecko covering 40+ coins with 24-hour change data. No stale numbers, ever.
30+ functions: all trig (degrees), inverse trig, hyperbolic, log₁₀, ln, log₂, roots, powers, factorial, floor, ceiling, absolute value, constants π, e, τ.
Designed with equal care in both modes. Uses Plus Jakarta Sans + Fraunces serif for editorial elegance. Preference persists across visits.
Complete keyboard control on the standard and scientific calculators. Numbers, operators, Enter, Backspace and Escape all mapped natively.
Mobile-first layout with touch-optimised button sizes. Works beautifully from 320px phones to 4K monitors without any app install.
Every calculation runs in your browser. No inputs, results or history are ever sent to any server. The password generator uses the Web Crypto API.
GPA calculator (4.0 scale with credit hours), grade calculator with weighted assignments, quadratic solver, statistics, matrix operations, triangle solver.
EMI, investment/CAGR with SIP, mortgage, salary/CTC breakdown, retirement corpus planner, discount, GST/VAT, tip splitter — all in one tab.
Number base converter (DEC/BIN/OCT/HEX/B36), binary arithmetic (AND/OR/XOR/NOT), Ohm's Law, color converter (HEX↔RGB↔HSL), matrix calculator.
Pick from 40 calculators in the left sidebar, organised by category. Use the search box to find any tool instantly.
Type via buttons, keyboard (standard/scientific), or fill in the form fields. Currency and crypto tools auto-fetch live rates.
Results appear instantly in your browser. The standard calculator keeps a scrollable history. No page reloads.
Jump between all 40 tools at any time via the sidebar — no lost state, no waiting, no account required.
Expert tutorials, mathematical breakdowns, and actionable guides for everyday tools.
No account. No downloads. No data stored. Just calculate.
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