Free Online Tools & Calculators
Access a powerful collection of free, easy-to-use online tools and calculators. Designed for simplicity and efficiency—no registration required.
Access a powerful collection of free, easy-to-use online tools and calculators. Designed for simplicity and efficiency—no registration required.
Decode the color bands on 4 band axial lead resistors to find their resistance and tolerance.
Decode the color bands on 5 band axial lead resistors to find their resistance and tolerance.
Decode the color bands on 6 band axial lead resistors to find their resistance and tolerance.
Calculate the equivalent resistance of multiple resistors in parallel.
Calculates the relationship between voltage (V), current (I), resistance (R), and power (P) in a circuit.
Estimates how long a battery will last given its capacity and a device's consumption.
Convert between wire gauge (AWG) and diameter in inches and millimeters.
A simplified BMX gear calculator tool that instantly computes gear inches or roll-out distance based on chainring, cog size, and tire selection.
Calculate your monthly mortgage payment based on the principal (load amount), interest rate, and term length of the loan.
Calculate the future value of an investment with compound interest.
Generate multiple hash values (MD5, SHA-1, SHA-256, SHA-384, SHA-512, Base64) from any text input.
Create custom, royalty-free SVG icons and images by describing what you want. Download and use them in your projects.
Convert between different currencies using real-time exchange rates from a reliable API.
Click on a world map to see sunrise and sunset times for the upcoming week at any location.
Calculate the required series resistor value and power rating for LEDs based on source voltage, forward voltage, and current.
Calculate output voltage from a voltage divider circuit using two resistors, or solve for resistor values.
Decode three-digit ceramic capacitor codes to find capacitance values in picoFarads, nanoFarads, and microFarads.
Calculate the correct chain length for your bicycle based on chainstay length, chainring size, and cog size.
Convert tire pressure between PSI, Bar, and kPa units for optimal vehicle handling and performance.
Convert between hexadecimal and RGB color codes with real-time color preview for design and development.
Calculate and simplify aspect ratios from width and height dimensions, essential for photography and design.
Generate strong, random passwords with customizable length and character types for enhanced security.
Convert numbers between binary, decimal, and hexadecimal bases for programming and electronics work.
Generate QR codes instantly from any text or URL. Download as PNG for sharing and printing.