Technology Calculators49 calculators

Electronics, storage, display, networking, numeral-system, and security calculators.

3D Printing

1 calculator

Filament Calculator

Calculate 3D printer filament length, weight, volume, and cost from your STL or sliced print. Supports PLA, ABS, PETG, TPU, and more in 1.75mm or 2.85mm.

Color & Design

1 calculator

Color Converter RGB/HEX/HSL

Convert colors between RGB, HEX, and HSL formats with precise mathematical conversion.

Display & Screen

6 calculators

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

15 calculators

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

3 calculators

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

4 calculators

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

4 calculators

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

14 calculators

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.

Other

1 calculator

Battery Life Calculator

Estimate battery runtime from battery capacity (mAh) and device power consumption.

All Technology Calculators (A–Z)

About Technology Calculators

Electronics, storage, display, networking, numeral-system, and security calculators. Our technology calculators use industry-standard formulas to deliver accurate results instantly. All calculators are free to use. Create an account to save your favorites and calculation history.