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Featured Utilities
TrendingEMI / Loan Calculator
Calculate monthly EMI payments for home, car, and personal loans using the loan amount, interest rate, and repayment tenure.
Currency Converter
Convert between global currencies using reference exchange rates to estimate travel expenses, cross-border payments, and foreign currency values.
Percentage Calculator
Calculate percentage increases, percentage decreases, proportions, and percentage differences between two numbers for school, business, and financial calculations.
Age Calculator
Find your exact age in years, months, and days from your date of birth and a selected reference date.
Word Counter
Count words, characters, sentences, and paragraphs in real time while estimating reading time and speaking duration for articles and essays.
BMI Calculator
Calculate your body mass index (BMI) from height and weight, then see the standard weight-status category for adults.
Password Generator
Generate strong, randomized passwords using customizable lengths, uppercase and lowercase letters, numbers, and optional special symbols to protect accounts.
Unit Converter
Convert measurements across length, mass, temperature, area, volume, and speed units with immediate two-way conversions and exact conversion factors.
Finance
EMI, mortgage, salary and investment calculators
EMI / Loan Calculator
Calculate monthly EMI payments for home, car, and personal loans using the loan amount, interest rate, and repayment tenure.
Compound Interest Calculator
Project your long-term investment or savings growth using your starting balance, recurring contributions, annual interest rate, compounding frequency, and investment horizon.
Simple Interest Calculator
Calculate simple interest charges or investment yields using your initial principal amount, annual interest rate, and total loan duration.
Mortgage Calculator
Estimate monthly mortgage payments, total interest costs, and amortization timelines based on your home purchase price, down payment, and loan term.
Salary Calculator
Convert wages across hourly, weekly, biweekly, monthly, and annual pay schedules to evaluate earnings, overtime rates, and employment contract offers.
Tax Calculator
Estimate your progressive income tax liability, effective tax rate, and marginal tax bracket using taxable income and standard deduction brackets.
Discount / Sale Price Calculator
Calculate promotional retail savings and final checkout prices using original item tags, percentage discount rates, or fixed cash coupons.
Tip Calculator
Calculate restaurant tip amounts and split the final dining bill evenly among party members based on service satisfaction level.
Retirement Savings Calculator
Project your retirement nest egg and estimated annual savings growth based on current age, retirement target, annual contributions, and expected investment returns.
Currency Converter
Convert between global currencies using reference exchange rates to estimate travel expenses, cross-border payments, and foreign currency values.
Auto Loan Calculator
Calculate monthly car payments, total financing costs, and loan amortization using vehicle purchase price, down payment, trade-in allowance, and interest rate.
Student Loan Calculator
Calculate monthly student loan payments, total interest charges, and payoff schedules while evaluating how extra monthly payments accelerate debt payoff.
Savings Goal Calculator
Determine the monthly deposit needed to reach your savings target, or calculate how many months required given your current recurring contributions.
Net Worth Calculator
Calculate your personal net worth by summing liquid and fixed assets, then subtracting mortgages, student loans, and credit card liabilities.
Freelancer Quarterly Tax Calculator
Estimate 1099 quarterly self-employment taxes, Social Security, Medicare obligations, and income tax deductions for independent contractors and sole proprietorships.
Amortization Calculator
Generate a comprehensive loan amortization schedule displaying monthly principal reduction, interest breakdown, and remaining loan balance across the full repayment term.
Inflation Calculator
Measure how inflation changes purchasing power over time using official historical U.S. CPI data or a custom annual inflation rate.
APR Calculator
Calculate the Estimated Annual Percentage Rate (APR) on loans by factoring in stated interest rates, upfront financing fees, and loan duration.
401(k) Calculator
Project your 401(k) retirement balance at retirement age using employer matching formulas, personal contribution percentages, and projected annual investment returns.
Math & Time
Scientific, age, date, fraction and number converters
Percentage Calculator
Calculate percentage increases, percentage decreases, proportions, and percentage differences between two numbers for school, business, and financial calculations.
Age Calculator
Find your exact age in years, months, and days from your date of birth and a selected reference date.
Date Difference Calculator
Calculate the exact number of days, weeks, months, and years between two calendar dates for project scheduling and deadlines.
Time Calculator
Add, subtract, and convert time durations in hours, minutes, and seconds for timesheet auditing, project tracking, and media production.
Scientific Calculator
Solve advanced mathematical equations involving trigonometric functions, logarithms, exponents, square roots, and algebraic operations directly in your browser.
Fraction Calculator
Add, subtract, multiply, and divide proper, improper, and mixed fractions with automatic reduction to lowest terms and decimal equivalents.
Average / Mean Calculator
Calculate the arithmetic mean, median, mode, range, and geometric average for any list of numbers separated by commas or spaces.
Square Root Calculator
Calculate square roots, cube roots, and custom nth roots of positive numbers with exact radical simplification and decimal precision.
Random Number Generator
Generate truly pseudo-random numbers within a customizable minimum and maximum range for giveaways, statistical sampling, games, and lotteries.
Number to Words Converter
Convert numeric values into standard English words and formal check-writing currency formats for invoices, legal documents, and banking.
Grade Calculator
Calculate weighted course grades, determine current semester standing, and find the minimum final exam score required to achieve your target letter grade.
GPA Calculator
Calculate high school and college grade point averages across weighted and unweighted scales, supporting AP, IB, and Honors grade point adjustments.
Standard Deviation Calculator
Compute population and sample standard deviation, variance, mean, and sum of squares for any list of dataset values.
Text Utilities
Word counters, sorting, converters and readability checkers
Word Counter
Count words, characters, sentences, and paragraphs in real time while estimating reading time and speaking duration for articles and essays.
Character Counter
Count characters, letters, numbers, spaces, and byte sizes to meet strict publishing limits for social media posts, meta descriptions, and ads.
Case Converter
Transform text casing between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab-case formats with a single click.
Text Reverser
Reverse strings of text by character, by word, or upside down for coding puzzles, cipher creation, and playful messages.
Remove Duplicate Lines
Remove duplicate lines from text lists, lists of URLs, or email rosters while preserving original order or sorting alphabetically.
Text Sorter
Sort text lists alphabetically, numerically, in reverse order, or by line length to organize lists, datasets, and inventories.
Whitespace Remover
Strip unnecessary spaces, redundant tabs, and blank lines from text snippets or code to clean copy and reduce payload size.
Word Frequency Counter
Analyze word frequency, density percentages, and keyword repetition across your copy to improve SEO optimization and writing clarity.
Palindrome Checker
Check whether a word, phrase, or number reads the same backwards as forward, ignoring spaces, punctuation, and letter capitalization.
Readability Score Checker
Evaluate text readability using Flesch-Kincaid Grade Level, Flesch Reading Ease, and Gunning Fog scores to match content to your audience.
Markdown Editor
Write and edit Markdown text with an instant split-screen preview, quick formatting toolbar shortcuts, and one-click copyable HTML output.
Lorem Ipsum Generator
Generate customizable Lorem Ipsum dummy placeholder text by paragraphs, sentences, or word counts for web wireframes and layout designs.
Health & Fitness
BMI, TDEE calorie, body fat and sleep calculators
BMI Calculator
Calculate your body mass index (BMI) from height and weight, then see the standard weight-status category for adults.
Calorie Calculator (TDEE)
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) to find calorie targets for maintenance, fat loss, or weight gain.
Body Fat Percentage Calculator
Estimate body fat percentage and lean body mass using the U.S. Navy circumference method with neck, waist, and hip measurements.
Pregnancy Due Date Calculator
Calculate your estimated baby due date, current gestational age, and developmental trimesters based on your last menstrual period or conception date.
Ovulation Calculator
Estimate your ovulation day and peak fertile window based on average menstrual cycle length and the date of your last period.
Water Intake Calculator
Calculate recommended daily water intake in ounces and liters based on body weight, daily physical activity, and environmental climate.
Ideal Weight Calculator
Estimate healthy target body weight ranges for your height using clinical formulas including Devine, Robinson, Miller, and Hamwi equations.
Macronutrient Calculator
Calculate daily macronutrient targets for protein, carbohydrates, and dietary fats tailored to your total calorie goal, body weight, and fitness objectives.
Running Pace Calculator
Calculate running pace, total race time, or distance splits for 5K, 10K, half marathon, and full marathon training runs.
Sleep Cycle Calculator
Calculate optimal bedtimes and wake-up times based on natural 90-minute sleep cycles to wake up feeling refreshed between sleep stages.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) to discover the baseline calories your body burns at rest each day to sustain life.
Macronutrient Splitter Calculator
Split daily calorie targets into customized protein, carbohydrate, and fat gram ratios using presets for Keto, Balanced, Zone, and High-Protein diets.
Developer & Utility
Password, Base64, QR, UUID and unit converters
Password Generator
Generate strong, randomized passwords using customizable lengths, uppercase and lowercase letters, numbers, and optional special symbols to protect accounts.
Password Strength Checker
Test password strength, estimate entropy bits, and identify vulnerabilities such as dictionary words, repeated patterns, and short lengths.
Unit Converter
Convert measurements across length, mass, temperature, area, volume, and speed units with immediate two-way conversions and exact conversion factors.
Color Picker + HEX/RGB/HSL Converter
Pick, inspect, and convert color codes between HEX, RGB, HSL, and CMYK formats with live color palette previews.
Aspect Ratio Calculator
Calculate aspect ratios, find missing image or video dimensions, and verify proportions for common formats like 16:9, 4:3, and 1:1.
Binary to Text Converter
Convert plain text strings to binary code and decode 8-bit binary byte sequences back into human-readable ASCII characters in real time.
Base64 Encoder / Decoder
Encode plain text into Base64 strings or decode Base64 data into readable UTF-8 text for web APIs and data transmission.
Word to PDF (basic)
Convert text documents and typed notes into downloadable, print-ready PDF files with clean formatting directly in your browser.
QR Code Generator
Create customized QR codes for website URLs, plain text, Wi-Fi networks, and contact details with downloadable high-resolution PNG images.
UUID / Random ID Generator
Generate standard UUID version-4 identifiers with cryptographic randomness in bulk or single formats for database keys and system development.
Dice Roller
Roll virtual polyhedral dice including D4, D6, D8, D10, D12, D20, and D100 with custom modifiers and statistical roll tracking.
JSON Formatter
Format, validate, and beautify JSON data with custom indentation to make nested structures easier to read, inspect, and share.
Hash Generator
Generate cryptographic hash digests from text strings or files using MD5, SHA-1, SHA-256, and SHA-512 algorithms directly in your browser.
Regex Tester
Test regular expressions against sample strings with real-time match highlighting, regex flag toggles, and detailed capture group breakdown displays.
EV Charging vs Gas Cost Calculator
Calculate annual driving fuel costs and potential savings of an Electric Vehicle (EV) compared to a gasoline vehicle over time.
Safe & Secure
All tools execute inside your browser. Your inputs never touch our servers.
Zero Account Setup
100% free with no login required. Instant usage across mobile and desktop.
Blazing Fast
Immediate computation logic built on client-side JS. No latency.
Learn with HelloTools Guides & Blog
Read our simplified guides on financial models, tax brackets, BMI indices, and developer tips.