All Calculators

Finance & Money

Financial calculations for personal and business use

Mortgage Calculator

An online tool to calculate your monthly mortgage payments, total interest paid, and amortization schedule.

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Finance & Money

ROI Calculator

An online tool to calculate the Return on Investment (ROI) for a business or financial investment.

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Finance & Money

Compound Interest Calculator

An online tool to calculate compound interest on an investment or savings account, showing how your money can grow over time.

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Finance & Money

Loan Amortization Calculator

Calculate loan amortization schedules showing monthly payments split between principal and interest. Visualize your debt payoff.

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Finance & Money

Cryptocurrency Profit/Loss Calculator

Calculate crypto trading profits, losses, fees, and taxes. Advanced portfolio analysis for Bitcoin, Ethereum, and 20+ cryptocurrencies.

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Finance & Money

Online Data Visualization Tool

Turn CSV data into professional charts instantly. Create bar, line, pie, and scatter plots with real-time updates and easy exports.

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Finance & Money

Inflation Calculator

Calculate inflation impact with historical CPI data from 1950-2024. Includes inflation, deflation, future value, real returns, and savings goal calculators.

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Finance & Money

Health & Fitness

Health and fitness calculations for wellness tracking

BMI Calculator

An easy-to-use online tool to quickly calculate your Body Mass Index (BMI) and determine if you are in a healthy weight range based on your height and weight.

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Health & Fitness

BMI Calculator for Pregnant Women

Easily estimate your pre-pregnancy BMI and see healthy weight gain guidelines for pregnancy.

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Health & Fitness

Calorie Calculator

Calculate your estimated daily calorie needs for weight loss, gain, or maintenance, based on your activity level and personal details.

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Health & Fitness

Mathematics

Mathematical calculations and scientific functions

Basic Calculator

Free online basic calculator for everyday math. Perform addition, subtraction, multiplication, and division quickly and easily.

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Mathematics

Scientific Calculator

A powerful online scientific calculator for complex math, engineering, and scientific problems, including trigonometric and logarithmic functions.

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Mathematics

Percentage Calculator

An all-in-one online tool to calculate percentages, including 'percent of', 'percent change', and 'percent increase/decrease'.

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Mathematics

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step solutions and simplified results.

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Mathematics

Quadratic Equation Solver

Solve quadratic equations using the quadratic formula with step-by-step solutions and graphical visualization.

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Mathematics

Area & Perimeter Calculator

Calculate area and perimeter for various geometric shapes including rectangles, circles, triangles, and polygons.

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Mathematics

Mean, Median, Mode Calculator

Calculate statistical measures including mean (average), median, mode, and range for any data set.

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Mathematics

Standard Deviation Calculator

Calculate standard deviation, variance, and other statistical measures for population and sample data.

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Mathematics

Probability Calculator

Calculate probabilities for various scenarios including combinations, permutations, and statistical distributions.

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Mathematics

Sequence & Series Calculator

Calculate arithmetic and geometric sequences, find nth terms, and compute series sums with step-by-step solutions.

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Mathematics

Business & Professional

Business calculations for professionals and entrepreneurs

Break-Even Calculator

Calculate your business break-even point to determine when your revenue will equal your costs.

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Business & Professional

Profit Margin Calculator

Calculate gross profit margin, net profit margin, and markup percentages for your business.

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Business & Professional

Freelance Rate Calculator

Calculate your ideal freelance hourly rate based on expenses, taxes, desired income, and business goals.

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Business & Professional

Time Tracking Calculator

Track work hours, calculate overtime pay, and manage time entries for accurate payroll calculations.

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Business & Professional

Lifestyle & Personal

Personal life calculations and planning tools

Pregnancy Due Date Calculator

Calculate your baby's estimated due date based on your last menstrual period (LMP), conception date, or a recent ultrasound.

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Lifestyle & Personal

Dog Age Calculator

Convert your dog's age to human years with our accurate calculator that considers breed size and modern veterinary research.

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Lifestyle & Personal

Cat Age Calculator

Convert your cat's age to human years with our calculator based on feline development stages and veterinary guidelines.

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Lifestyle & Personal

Age Calculator

Calculate your exact age in years, months, days, hours, and more. Find the age difference between two dates.

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Lifestyle & Personal

Date Difference Calculator

Calculate the difference between two dates in years, months, days, weeks, hours, and more.

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Lifestyle & Personal

Carbon Footprint Calculator

Estimate your annual carbon emissions from energy, travel, and lifestyle. Get a clear breakdown of your environmental impact.

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Lifestyle & Personal

Engineering & Science

Engineering and scientific calculations

Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law and electrical power formulas.

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Engineering & Science

Momentum Calculator

Calculate momentum, impulse, and analyze collisions with our comprehensive physics calculator. Solve mechanics problems using conservation laws.

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Engineering & Science

Pressure Vessel Calculator

Calculate pressure vessel wall thickness and ratings using ASME standards for cylindrical and spherical vessels.

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Engineering & Science

Electrical Power Calculator

Calculate electrical power, current, voltage, and resistance for AC and DC circuits.

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Engineering & Science

Flow Rate Calculator

Calculate fluid flow rate, velocity, and pipe sizing for hydraulic and pneumatic systems. Essential engineering tool for flow analysis and pipe design.

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Engineering & Science

Wire Gauge Calculator

Calculate wire gauge (AWG) requirements for electrical installations based on current, voltage drop, and distance.

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Engineering & Science

Kinematic Calculator

Calculate motion parameters using kinematic equations for velocity, acceleration, displacement, and time.

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Engineering & Science

Beam Deflection Calculator

Calculate beam deflection, bending moment, and stress for various beam loading conditions.

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Engineering & Science

Density Calculator

Calculate density, mass, or volume using the density formula (ρ = m/V) for various materials.

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Engineering & Science

Torque Calculator

Calculate torque, force, and distance using torque equations for mechanical engineering applications.

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Engineering & Science

Efficiency Calculator

Calculate system efficiency, input power, output power, and energy losses for engineering applications.

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Engineering & Science

Resistor Color Code Calculator

Calculate resistor values from color bands quickly, reliably and accurately.

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Engineering & Science

Unit Conversion

Convert between different units of measurement

Unit Converter

Convert between different units of measurement including length, weight, temperature, volume, area, and more.

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Unit Conversion

Epoch Time Converter

Convert Unix/Epoch timestamps to human-readable dates and vice versa. Perfect for developers and system administrators.

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Unit Conversion

Universal Time Converter

Convert time between any time zones, plan international meetings, and access a world clock. Features automatic DST handling and Unix timestamp conversion.

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Unit Conversion

Education

Educational and academic calculations and tools

Global GPA & CGPA Calculator

Calculate GPA/CGPA using region-specific grading systems for 14+ countries. Smart, adaptive calculator for global students.

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Education

GPA Conversion Calculator

Convert GPA between India, US, Germany, Canada, Finland using research-backed equivalency tables. Instant, accurate conversions.

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Education

Tools

Handy tools to help you with various tasks

Text Analyzer & Word Counter

A comprehensive and real-time Text Analyzer & Word Counter that goes far beyond basic counting.

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Tools

Tip Calculator

Calculate tips, split bills, and handle any tipping scenario with our comprehensive tip calculator. Features smart rounding, tax options, and bill splitting.

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Tools

Password Strength Calculator

Check password strength and generate secure passwords with our free online tool. Real-time analysis, private, and completely client-side for maximum security.

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Tools

Universal Color Palette & Display Tester

Professional display testing tool for dead pixel detection, color accuracy verification, and screen health assessment with complete privacy protection.

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Tools

Universal Image Toolkit

Professional image editing tool with resize, crop, rotate, filters, and format conversion. 100% private and browser-based.

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Tools

Ultimate Offline Text Pad

Privacy-first text editor with real-time analytics, Pomodoro timer, voice typing, themes, templates, and offline operation. Perfect for writers and students.

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Tools

LLM Cost Calculator

Calculate LLM API costs for OpenAI, Anthropic, Google, and other providers. Compare pricing, estimate token usage, and optimize AI project budgets.

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Tools