Technology Calculators49 calculators
Technology brings plenty of tricky calculations, but this set of calculators takes the chore out of tech math. Use them to compare screen aspect ratios, sort out data storage for devices, or check network speeds for your classroom or office. Teachers, students, IT professionals, and anyone working on digital projects can find straightforward answers here. These calculators aim to make technical planning clear and save everyone time, whether you're troubleshooting a system or mapping out a new project.
3D Printing
Color & Design
Display & Screen
Aspect Ratio Calculator
Calculate missing width or height to maintain an aspect ratio, or find the aspect ratio of given dimensions.
Display Resolution Calculator
Calculate pixels per inch (PPI), aspect ratio, and total pixel count from display dimensions.
eDPI Calculator
Calculate your effective DPI for gaming. Compare mouse sensitivity setups and find your cm/360.
Pixels Per Inch Calculator
Calculate PPI from screen resolution and display size. Compare pixel density across monitors, phones, and tablets.
Pixels to Inches Calculator
Convert pixels to inches and inches to pixels at any DPI. Essential for print design, screen layout, and image sizing.
Screen Size & PPI Calculator
Calculate screen dimensions, PPI (pixels per inch), and total pixels from diagonal size and resolution.
Electronics
Battery Charge Time Calculator
Calculate how long it takes to charge a battery. Enter capacity in mAh, charge current or C-rate, and efficiency to find charge time.
Capacitors in Series & Parallel Calculator
Calculate total capacitance for capacitors in series or parallel, plus stored charge and energy.
Crossover Calculator
Calculate audio crossover component values (capacitor and inductor) for first and second-order speaker crossover networks.
Dipole Calculator
Calculate half-wave dipole antenna length from frequency. Find total length and each leg for common ham and commercial bands.
Inductor Calculator
Calculate inductor properties: inductive reactance (XL = 2 pi f L), stored energy (E = 1/2 L I squared), and RL time constant (tau = L/R).
LED Resistor Calculator
Calculate the resistor needed for an LED circuit. Find resistance from supply voltage, LED forward voltage, and current. Shows nearest standard value and power rating.
Low Pass Filter Calculator
Design passive RC or RL low-pass filters. Calculate cutoff frequency, component values, and attenuation.
Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's Law V = IR. Select which variable to solve for.
RC Circuit Time Constant Calculator
Calculate the time constant, charging voltages at various time intervals, and charge time for an RC circuit.
Solenoid Calculator
Calculate solenoid magnetic field (B = mu0 n I) and inductance (L = mu0 n squared A l). Enter turns, length, radius, and current.
Three-Phase Power Calculator
Calculate apparent, real, and reactive power for three-phase electrical systems in star or delta configuration.
Transformer Calculator
Calculate transformer turns ratio, secondary voltage, secondary turns, and current ratio from primary parameters.
Voltage Divider Calculator
Calculate output voltage, current, and power dissipation for a resistive voltage divider circuit.
Wire Resistance Calculator
Calculate wire resistance, voltage drop, and maximum current capacity from AWG gauge, length, and material.
Wire Size Calculator
Calculate the required wire gauge (AWG) from amperage, distance, and acceptable voltage drop. Supports copper and aluminum wire.
Networking
Bandwidth Converter
Convert between bits/s, bytes/s, Kbps, Mbps, Gbps, KB/s, MB/s, and GB/s bandwidth units.
CIDR Calculator
Calculate IP address ranges, subnet masks, and host counts from CIDR notation. Supports any prefix length from /0 to /32.
IP Subnet Calculator
Calculate network address, broadcast address, usable host range, and number of hosts from an IP address and CIDR subnet mask.
Numeral Systems
Binary to Hexadecimal Calculator
Convert between binary and hexadecimal number systems. Also shows decimal and octal equivalents.
Decimal to Hexadecimal Calculator
Convert decimal numbers to hexadecimal and hexadecimal to decimal. Also shows binary and octal representations.
Hex to RGB Converter
Convert RGB color values (0-255) to hexadecimal color codes, HSL, and CSS formats.
RGB to Hex Converter
Convert RGB color values to hexadecimal, HSL, CSS rgba(), and find complementary colors.
Security & Sysadmin
Chmod Calculator
Convert between chmod numeric (octal) and symbolic permission notation. Set read, write, and execute for owner, group, and others.
Password Strength Calculator
Calculate password entropy and estimated crack time based on character set and length.
RAID Calculator
Calculate RAID array capacity, fault tolerance, and performance characteristics for RAID 0, 1, 5, 6, and 10 configurations.
RSA Calculator
Demonstrate RSA encryption and decryption with small prime numbers for educational purposes. See how public and private keys are generated.
Storage & Data
Binary Addition Calculator
Add two binary numbers together and see the result with carry bits displayed at each position.
Binary/Decimal/Hex Converter
Convert numbers between binary, decimal, octal, and hexadecimal number systems instantly.
Bitwise Calculator
Perform AND, OR, XOR, NOT, left shift, and right shift operations on two integers. Shows results in binary, decimal, and hex.
Bytes to MB Converter
Convert data sizes between bytes, KB, MB, GB, and TB using binary (1024-based) conversion.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes.
Data Transfer Calculator
Calculate file transfer time from file size and connection speed. Compare transfer speeds across different connections.
Data Usage Calculator
Estimate mobile data consumption from video, music, social media, browsing, and email to find the right phone plan.
Download Time Calculator
Calculate how long it takes to download a file based on your internet speed and file size.
File Download Time Calculator
Calculate file transfer time between devices or over a network from file size and transfer speed.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal bases.
Two's Complement Calculator
Convert between decimal and two's complement binary representation for 8-bit, 16-bit, or 32-bit integers.
Unix Time Calculator
Convert between Unix timestamps and human-readable dates. Add or subtract seconds, minutes, hours, or days from a timestamp.
Video File Size Calculator
Estimate video file size from resolution, frame rate, codec, and duration. See output in MB and GB for planning storage and uploads.
XOR Calculator
Perform bitwise XOR on two numbers. Supports decimal, binary, and hexadecimal input and output.