All Calculators

Browse all available calculators and tools

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Freelance Rate Calculator

Calculate your ideal freelance hourly rate. Estimate income, account for taxes, and plan expenses to ensure profitability with this free rate calculator.

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education

International GPA Converter

Convert grades between any of 150+ countries instantly. Free international GPA calculator supporting bidirectional conversions and 17 grading systems.

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finance

Loan Amortization Calculator

Free loan amortization calculator with printable schedule. Calculate payments, interest, payoff timeline, and savings from extra payments

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health

TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE) using Mifflin-St Jeor or Katch-McArdle. Get calorie targets for maintenance, cutting, and bulking.

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lifestyle

Age Calculator

Free age calculator: exact age in years, months, days from date of birth. Compare ages, next birthday countdown, life stage, and generation.

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lifestyle

Cat Age Calculator

Convert your cat’s age to human years. Free calculator with life stages, weight check, and care guidance for indoor and outdoor cats.

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lifestyle

Dog Age Calculator

Convert your dog’s age to human years. Free calculator by breed size (small, medium, large, giant) with life stage and care tips.

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math

Algebra Calculator

Solve algebra problems step-by-step. Free online algebra calculator for equations, factoring, polynomials, and simplifying expressions for math students.

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math

Area & Perimeter Calculator

Calculate area and perimeter for any shape. Free geometry tool for rectangles, circles, triangles, and polygons with step-by-step formulas and solutions.

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math

Percentage Calculator

Calculate percentages easily. Free tool for finding percentage change, increases, discounts, and weighted averages. Instant accurate results for finance.

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math

Scientific Calculator

Advanced free online scientific calculator. Solve complex math problems with trigonometry, logarithms, exponentials, and statistical functions for students.

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math

Triangle Calculator

Solve triangles and calculate all properties including sides, angles, area, perimeter, base, and dimensions. Includes formulas and step-by-step solutions.

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math

Unit Circle Calculator

Interactive unit circle calculator. Find exact Sin, Cos, and Tan values for any angle in degrees or radians. Master trigonometry with this free visual tool.

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science

Classical Mechanics Calculator

Solve physics problems for force, motion, and energy. Free classical mechanics calculator using Newton's laws for students and engineering professionals.

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science

Pressure Vessel Calculator

Calculate minimum required wall thickness & Maximum Allowable Working Pressure (MAWP) for cylindrical & spherical vessels per ASME Sec VIII Div 1 (UG-27).

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science

Wire Gauge Calculator

Calculate appropriate wire gauge (AWG), amps, and voltage drop. Free electrical wire size calculator for DC and AC circuits ensuring safety and efficiency.

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tools

Ambient Sound Player

Free ambient sound player online with nature sounds, white noise, and focus music. Perfect for concentration, sleep, and productivity. No signup required.

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tools

Color Palette & Display Tester

Comprehensive monitor test suite: check for dead pixels, backlight bleed, IPS glow, OLED burn-in & motion ghosting. Free diagnostics for all screens.

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tools

Days Until Calculator

Count down to any future event. Calculate days, weeks, months until weddings, vacations, birthdays, and important milestones.

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tools

Encode & Decode Tool

Secure text encoder and decoder tool. Convert Base64, URL encoding, MD5, and SHA-256 hashes instantly. Free reliable tool for developers and security testing.

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tools

Epoch Time Calculator

Convert Unix timestamps to dates and back. Free epoch time converter with timezone support, milliseconds, and developer cheat sheet.

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tools

Number Base Converter

Convert numbers between Binary, Decimal, Hexadecimal, and Octal instantly. Free base converter tool with bitwise operations for programmers and students.

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tools

PDF to Text Converter

Free PDF to text converter. Extract or copy text from PDFs online—no upload, runs in your browser. OCR for scanned PDFs. Private and secure.

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tools

QR Code & Barcode Generator

Create custom QR codes and barcodes instantly. Free generator supporting URLs, text, Wi-Fi, and 10+ barcode formats. Download high-quality images for print.

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tools

Random Number Generator

Generate truly random numbers with advanced statistics. Choose from cryptographic, LCG, or standard algorithms. For games, research, and decision-making

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tools

Random Text Generator

Generate random text, Lorem Ipsum, passwords, and test data instantly. Free online tool for developers to create placeholder content and secure strings.

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tools

Text Analyzer

Free online text analyzer & word counter. Check character count, Flesch-Kincaid readability scores, and keyword density to improve SEO and writing quality.

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tools

Unit Converter

Convert length, weight, temperature, area, pressure & 200+ units. Fast, accurate online unit converter for metric, imperial & scientific measurements.