Technology & Everyday Tools
Tech, photography, audio, networking, and gaming utility calculators for daily use
Technology Tools
50 calculatorsURL Encode / Decode
Encode or decode URL strings for web development. Convert special characters to percent-encoded format and back for safe URL transmission in any browser.
16:10 Aspect Ratio Calculator
Calculate 16:10 aspect ratio dimensions from width or height. Get simplified ratio, diagonal, area, megapixels, and nearest common resolution with interactive charts.
16:9 Aspect Ratio Calculator
Calculate 16:9 aspect ratio dimensions from width or height. Free widescreen calculator with simplified ratio, decimal ratio, orientation, and interactive charts for screens, images, and video.
4:3 Aspect Ratio Calculator
Calculate 4:3 aspect ratio dimensions from width or height. Get simplified ratio, diagonal, area, megapixels, and nearest common resolution with interactive charts.
ACT Score Calculator — Estimate Your ACT Composite Score
Estimate ACT composite score from English Math Reading and Science scores. Free ACT calculator with scaled scores, percentile, and rating for college prep.
AP Bio Score Calculator — AP Biology Exam Score Estimator
Free AP Biology score calculator estimates your final AP Bio exam score (1-5) from multiple-choice and free-response section scores with charts, breakdowns, and score interpretation.
AP Chem Score Calculator — AP Chemistry Exam Score Estimator
Free AP Chemistry score calculator estimates your final AP Chem exam score (1-5) from multiple-choice and free-response section scores with charts, breakdowns, and score interpretation.
AP Lang Score Calculator — AP English Language & Composition Score Estimator
Estimate your AP English Language score (1-5) from multiple-choice and three essay scores. Free AP Lang calculator with instant results, charts and breakdown.
Aspect Ratio Calculator
Calculate aspect ratio from width and height dimensions. Get simplified ratio like 16:9 or 4:3, decimal ratio, closest standard ratio, and orientation with interactive charts.
Battery Capacity Calculator – Amp-Hours & Watt-Hours
Calculate battery capacity in amp-hours (Ah) and watt-hours (Wh) from current draw and runtime for devices, UPS, and solar systems.
Battery Life Calculator – Runtime Estimator
Estimate battery life in hours and days based on battery capacity, device current draw, and discharge safety percentage. Works for phones, laptops, cameras, drones, and IoT devices.
Battery Size Calculator – Required Capacity Sizing
Calculate the required battery size in amp-hours for UPS, solar systems, and backup power based on load power and desired runtime.
Blink Free Photos Calculator
Calculate the probability of getting a blink-free group photo using the Ig Nobel Prize-winning formula. Find how many shots you need for 99% confidence in any group size.
Camera Field of View Calculator
Calculate camera angle of view and field of view from focal length, sensor dimensions, and distance. Free online photography FOV calculator with interactive charts.
CIDR Calculator — IPv4 Range & Subnet Mask Converter
Convert CIDR notation to IPv4 address ranges and vice versa. Compute subnet masks, network prefixes, wildcard masks, and usable host counts from any CIDR block with charts.
College GPA Calculator
Calculate your college GPA from course grades and credits on the 4.0 scale. Free online semester and cumulative GPA calculator with letter grade conversion, breakdowns, and charts.
CSS Aspect Ratio Calculator
Calculate CSS aspect ratio from width and height dimensions. Get simplified ratio like 16:9 or 4:3, closest standard ratio, decimal ratio, and orientation for responsive web design.
CV Screening and Interview Time Calculator
Estimate total hiring time spent on CV screening and candidate interviews. Calculate hours for resume review, interview rounds, interviewer hours, and staffing costs.
Download Time Calculator
Estimate file download time from size and internet speed in Mbps. Get results in seconds, minutes, and hours with speed breakdowns and interactive charts for any file or connection type.
Final Grade Calculator
Calculate what grade you need on your final exam to reach your target course grade. Free online final grade calculator with weighted formula, letter grades, and interactive charts.
GPA Calculator (Pakistan)
Calculate your semester GPA and CGPA using Pakistan university grading scales (4-point, 5-point, and Quaid-e-Azam). Free online GPA calculator with course breakdowns and charts.
Grade Curve Calculator — Curve Student Test Scores
Curve student test scores using linear rescaling, ratios, bell curve, or square root methods. Free online grade curving tool with interactive charts and breakdowns.
Guitar String Tension Calculator
Calculate guitar string tension in pounds and newtons for any gauge, scale length, and tuning. Free online tool with charts for musicians and luthiers.
Hamming Code (7,4) — Encoder, Decoder & Error Corrector
Encode 4-bit data into 7-bit Hamming codewords with parity bits. Detect and correct single-bit errors using syndrome vectors. Decode to original data instantly.
High School GPA Calculator — Unweighted & Weighted
Calculate high school GPA for unweighted and weighted scales with Honors, AP, IB, and credits. Free online GPA calculator with charts and detailed breakdowns.
IELTS Band Score Calculator
Calculate overall IELTS band score from four section scores. Free IELTS calculator with half-band rounding, comparison charts, and skill level descriptions.
Image File Size Calculator
Calculate uncompressed raster image file size from width, height, and bit depth. Free online image size estimator with interactive charts and detailed breakdowns.
Image Aspect Ratio Calculator
Calculate image aspect ratio from width and height in pixels. Get simplified ratio, decimal ratio, closest standard ratio, and orientation with charts.
Morse Code Translator — Encode & Decode Morse Code Online
Convert text to Morse code or decode Morse code back to text instantly with this free online translator. Features auto-detect, character breakdown table, and signal duration chart.
Password Entropy Calculator
Calculate password entropy in bits using the formula E = L × log₂(R). Enter character type counts to measure brute-force resistance and strength classification with charts.
Pixel Aspect Ratio Calculator
Calculate pixel aspect ratio (PAR) from image width and height with simplified ratio and standard presets like 16:9 and 4:3. Free tool with interactive charts.
Pixels Per Inch (PPI) Calculator
Calculate pixels per inch (PPI) from screen resolution and diagonal size. Get PPI, dot pitch, megapixels, and total pixels for any display instantly.
Pixels To Print Size Calculator
Convert digital image pixel dimensions to physical print size using pixel density (PPI). Free online calculator with instant results in inches and centimeters, charts, and breakdowns.
Portrait Aspect Ratio Calculator
Calculate the portrait aspect ratio of any image or video from width and height dimensions. Get simplified ratio, closest standard portrait ratio, and orientation with interactive charts.
PTE Score
Convert your PTE Academic score to CEFR level, IELTS band, TOEFL iBT equivalent, and university qualification. Free PTE score converter for study abroad and immigration.
RAID Calculator
Calculate RAID array capacity, usable storage, read/write speed gain, fault tolerance, and cost across RAID 0, 1, 1E, 5, 6, 10, 50, and 60. Free online RAID calculator with charts.
Resolution Scale
Scale display or image resolutions between 720p 1080p 2K 4K and 8K. Calculate scale factor aspect ratio and megapixels for source and target dimensions.
Resolutions New Year
Estimate your New Year's resolution success probability using research-backed statistics on goal tracking, written commitments, and monthly progress with interactive charts.
Screen Ratio Calculator
Calculate the aspect ratio of any screen from width and height dimensions. Get simplified ratio, decimal ratio, closest standard, and orientation with free online charts.
Screen Size Calculator
Calculate screen dimensions from diagonal and aspect ratio — width, height, area in square inches, PPI, and megapixels for monitors, TVs, phones, and projectors.
Semester Grade Calculator
Calculate your semester grade from Q1, Q2, and final exam grades with weighted percentage scoring. Free online grade calculator with letter grades and charts for students and teachers.
Sun Exposure Calculator
Calculate how long you can safely stay in the sun based on skin type, SPF, UV index, altitude, and reflective surfaces. Free sun safety tool with SPF recommendations and interactive charts.
Test Grade Calculator
Calculate your test grade percentage and letter grade instantly from correct answers and total questions. Free online test score calculator with interactive charts and answer breakdowns.
Timecode to Frame Calculator
Convert video timecode (HH:MM:SS:FF) to total frames at any frame rate. Free online timecode converter for video editors, filmmakers, and animators with interactive charts and breakdowns.
Video Frame Size Calculator
Calculate uncompressed video frame size from resolution, color depth, frame rate, and duration. Free online tool with charts for video editors and developers.
Video Size
Calculate video file size from duration and bitrate. Estimate storage space needed for compressed and uncompressed video files in MB, GB, and KiB with charts.
Audio File Size Calculator
Calculate uncompressed audio file size from bit depth, sample rate, duration, and channels. Results in KB, MB, and GB for WAV, AIFF, and FLAC audio formats.
Bandwidth Calculator
Calculate network bandwidth requirements from file size and transfer time with Mbps and MBps results for network planning and speed testing
Bandwidth-Delay Product
Calculate bandwidth-delay product for TCP throughput optimization from bandwidth and round-trip time. BDP in bits, KB and MB for network performance analysis.
Base64 Encode/Decode
Encode or decode Base64 text instantly with this free online converter supporting UTF-8 Unicode and special characters for web development and data transfer