Search and open any free gadget — converters, calculators, timers, and more.
Preview YouTube links and convert local video files to audio or video formats.
Convert files between 900+ formats — images, video, audio, documents, archives, ebooks, and more. Up to 2 GB.
Scientific calculator with every function you need — trig, logs, powers, roots, constants, memory, and more.
Convert between binary, octal, decimal, hexadecimal, and more number systems instantly.
Calculate exact age in years, months, days, hours, and minutes from any birth date.
Convert miles, kilometers, meters, feet, yards, inches, nautical miles, and more.
Convert kilograms, pounds, ounces, grams, stones, tons, and more mass units.
Calculate GPA from course grades and credit hours. Supports 4.0 scale.
Find the score you need on a final exam to hit your target grade.
Estimate concrete volume for slabs, footings, and columns in yd³ or m³.
Calculate network address, broadcast, mask, and host range from IP/CIDR.
Generate strong random passwords with custom length and character sets.
Calculate Body Mass Index from height and weight with category.
Estimate daily calorie needs using the Mifflin-St Jeor formula.
Estimate body fat percentage using the U.S. Navy method.
Calculate Basal Metabolic Rate with Mifflin-St Jeor or Harris-Benedict.
Estimate ideal body weight using multiple formulas (Devine, Robinson, Miller).
Convert between pace, speed, time, and distance for running or walking.
Estimate monthly mortgage payment, total interest, and amortization.
General loan payment calculator for any principal, rate, and term.
Estimate car loan payments including trade-in and down payment.
Simple and compound interest calculator for any principal and rate.
Find the payment amount needed to pay off a balance in a set time.
Project retirement savings with contributions and compound growth.
Full amortization schedule with principal and interest breakdown.
Project investment growth with regular contributions and returns.
See how inflation erodes purchasing power over time.
Time-value of money: solve for PV, FV, PMT, rate, or periods.
Estimate US federal income tax using simplified 2024 brackets (single).
Detailed compound interest with starting balance and contributions.
Convert salary between hourly, monthly, and annual figures.
Solve for interest rate given principal, payment, and term.
Add or remove sales tax from a price with any tax rate.
Advanced stopwatch with laps, splits, and precise timing.
Countdown timer with presets, alerts, and custom durations.
Count characters, words, sentences, paragraphs, and reading time as you type.
Calculate pregnancy due date from last menstrual period (Naegele’s rule).