Free Online Tools for the United States
Calculate state & local sales tax, restaurant tips, loan amortization schedules, and percentages. 100% browser-based with zero signup.
US State & Financial Tools
Tailored for US state and local tax structures and everyday calculations.
Universal Everyday Calculators
Fast browser-based utilities for loans, invoices, percentages, age, BMI, QR codes, and passwords.
Percentage Calculator
Solve any percentage problem: percentage of, percentage change, and ratios.
Age Calculator
Find your exact age in years, months and days, plus milestone stats.
BMI Calculator
Check your Body Mass Index and healthy weight category instantly.
Days Between Dates Calculator
Find the duration between two calendar dates in days, weeks and months.
Temperature Converter
Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) instantly.
Word & Character Counter
Live count of words, characters, sentences, paragraphs and reading time.
Free QR Code Generator
Generate clean, customizable QR codes for links, Wi-Fi, text and contacts.
QR Code Scanner
Scan QR codes using your camera or upload an image. Fast & private.
Strong Password Generator
Create cryptographically secure, random passwords with custom settings.
Compound Interest Calculator
See how compounding grows your money over time with customizable frequencies.
Loan Calculator
Calculate your fixed monthly loan payment and view the complete amortization table.
Free Invoice Generator
Create professional invoices with custom currency, tax options, and instant PDF download.