Free Online Tools - 380+ Tools for PDF, Image, Text and More

Estimate your 401k balance including employer match.

Project your 529 college savings growth — enter savings, monthly contributions, and years to see the future value.

Calculate alcohol by volume from original and final gravity readings — instant ABV, attenuation, and total alcohol for homebrewers.

Calculate your exact age in years, months, and days with totals, a next-birthday countdown, and one-click copy. Free, instant, and private.

Free online alarm clock — set multiple alarms, snooze, and wake to a loud alarm sound. Works in your browser.

Solve linear and quadratic equations for x, or evaluate math expressions — free, instant, no signup.

Estimate how regular payments grow over time — enter payment, rate, and years to see future value, contributions, and interest.

Free 7-question anxiety screening based on the GAD-7 questionnaire.

Estimate your AP exam score — pick your subject, enter practice-test points, and get your weighted composite and 1–5 score.

Simplify any width and height to its aspect ratio (e.g. 16:9), or find a missing dimension from a ratio. Free, no signup.

Calculate how much asphalt you need — tons, cubic yards and estimated cost for driveways and parking areas. Free, instant, no signup.

Free auto loan calculator - estimate car loan payments and total cost online

Compare car loan refinance offers. Monthly savings, break-even, total interest.

Calculate the mean (average) of any numbers instantly — plus median, mode, range, min, max, count and sum. Free, no signup.

Track your baby growth with WHO percentile charts. Enter age, weight and height to see where your little one stands.

Estimate blood alcohol content from weight, drinks, and time using the Widmark formula — educational estimates only.

Estimate your one-rep max from any bench press set with training percentages.

Free birth chart calculator with planets, houses, aspects and a printable chart wheel.

Calculate your Body Mass Index and healthy weight range.

Find your basal metabolic rate with the Mifflin-St Jeor equation.

Calculate board feet for lumber projects instantly. Enter dimensions to get accurate wood volume for buying and cutting.

Estimate body fat percentage with the U.S. Navy method.

Estimate your body fat percentage with the proven U.S. Navy tape-measure method — instant BFP, fat mass and lean mass results.

Discover your body shape from your measurements. Get your result in seconds, free and private.

Find your correct bra size at home. Enter your measurements for an accurate fit without a fitting room.

Plan your monthly budget with the 50/30/20 rule. See exactly where your money should go.

Estimate daily calorie needs from age, weight, height, and activity level. Plan meals and fitness goals with clear numbers.

Find your daily calorie target for safe weight loss.

Find out how many calories your workout burns. Covers running, cycling, swimming and 100+ activities.

Estimate federal tax on your investment gains — long-term or short-term, with 2025 and 2026 IRS brackets built in.

Estimate monthly car payments, total interest, and total loan cost.

Convert cat years to human years and find your cat life stage.

Free CD rate calculator — certificate of deposit growth, maturity value and APY.

Calculate CGPA or GPA instantly for 4.0, 5.0, and 10.0 grading scales. Add courses with credits and grades for totals.

A simple online tally counter — tap, use + and - buttons, or press spacebar. Custom steps and session stats.

Estimate buyer closing costs, seller fees, and net proceeds.

Convert centimeters to inches and inches to centimeters instantly.

Flip a virtual coin and track heads vs tails with a live scoreboard.

Use the Trencada Compound Interest Calculator to estimate investment growth easily. Calculate returns, savings, and future value with accurate results.

Estimate concrete cubic yards, bag counts, and cost for slabs and driveways.

Countdown timer with 5/10/15/20/30-minute presets and custom times, tab-title display, and finish alarm.

Free credit card payoff calculator — months to debt-free, interest, fixed vs minimum payments.

Convert cups to grams (and grams to cups) for 34 baking ingredients — flour, sugar, butter, oil and more. Free, no signup.

Convert currencies online with Trencada using current exchange rates. Quickly calculate the value of USD, EUR, GBP, CAD, and other currencies for free.

Free online daily planner — time-block your tasks, check them off, and watch your progress bar fill.

Find dates N days from today, count days between dates, add or subtract days.

Plan debt payoff. Compare snowball vs avalanche strategies side by side.

Calculate your debt-to-income ratio free. Front-end and back-end DTI with lender thresholds.

Convert decimals to simplified fractions and fractions to decimals — with steps.

Calculate discounts online for free. Find the discount amount, final price, and total savings quickly using a simple and easy-to-use calculator.

How old is your dog in human years? Enter breed size and age for a science-based estimate.

Estimate your pregnancy due date — from your last period or your IVF embryo transfer date (Day 3, 5, or 6), with gestational age and trimester.

Estimate eBay final value fees and net profit per sale.

Convert electrical units: power, voltage, current, resistance and more. Free, no signup.

Convert engineering units: force, torque, pressure, density and more. Free, no signup.

Track the time remaining until your next exam with a live countdown timer. Set your exam date and time to see the remaining days, hours, minutes, and seconds.

Convert Fahrenheit to Celsius and back instantly. Free temperature converter with common reference points.

Use the Trencada FD Calculator to calculate fixed deposit interest, maturity amount, and returns instantly with accurate and simple inputs.

Free FFMI calculator — fat-free mass index, lean mass and muscle-building score.

Plan financial independence free — find your FIRE number, years to FI, and whether you have already hit Coast FIRE.

Convert fluid units: volume, flow rate, pressure, viscosity. Free, no signup.

Project investment and savings growth with compound interest. Enter initial investment, monthly contributions, rate and years — free, no signup.

Calculate fuel cost for any road trip from distance, MPG, and gas price.

Find the greatest common factor of two or more numbers with steps.

Free GPA calculator for college and high school. Compute semester and cumulative GPA from your courses, grades, and credit hours.

Compute weighted course grades and the final exam score you need.

Find out how much gravel, crushed stone, pea gravel or sand you need — in tons, cubic yards, bags and cost. Free, instant, no signup.

Use our GST Calculator to quickly add or remove GST from any amount. Accurate, fast, and easy tool for businesses and individuals.

Free online habit tracker — check in daily, build streaks, and see your weekly progress at a glance.

Track hCG doubling time in early pregnancy. Enter two beta levels and dates to get your doubling rate.

Free online hearing test — check your hearing with tones at different pitches.

Free heart rate calculator — max heart rate, Karvonen training zones and fat-burn zone.

Find your five heart rate training zones from resting and maximum heart rate. Train at the right intensity every session.

Convert heat units: temperature, BTU, calories, thermal conductivity. Free, no signup.

Predict a childs adult height from parents heights.

Calculate HELOC payments free: interest-only draw payments and amortized repayment. No signup.

See how many years your savings last based on spending, growth, and inflation. Free, no signup.

Convert inches to centimeters instantly. Free length converter, precise to two decimal places.

Estimate your income tax for FY 2025-26 in seconds. Compare old vs new regimes with 80C/80D deductions — free, no signup.

Find the least common multiple of two or more numbers with step-by-step working.

See your full loan payoff plan free — monthly payment, total interest, payoff date, and a month-by-month amortization schedule.

Calculate monthly loan payments, total interest and payoff schedule — free online loan calculator.

Find your debt-free date and total interest.

A fun name-based compatibility score — just for entertainment.

Calculate daily calories and protein, carb and fat targets for your goal.

Pace chart for marathon and half marathon goals.

Calculate product markup and profit margin. Set your cost and desired margin to get the selling price.

Add, subtract, multiply, invert matrices up to 6x6. Determinant and transpose. Free, no signup.

What is your mental age? Take the free 12-question quiz and get your result instantly. No signup.

Convert between standard and military time.

Convert milliliters to cups and cups to milliliters.

Current moon phase, illumination and moon age for any date, plus next full and new moon.

Estimate your monthly mortgage payment, total interest, and full amortization schedule — free, instant, no signup.

Compare a refinance offer with your current mortgage: payment, savings, interest, and break even.

Find out how much mulch you need — cubic yards, 2-cu-ft bags, and cost estimates from bed length, width, depth and waste allowance.

Free net worth calculator - track assets minus liabilities online

Convert numbers to English words instantly. Check-writing and currency modes. Free, no signup.

Find your life path, destiny and soul urge numbers from your birth date and full name, with meanings. Free, no signup.

Free one rep max calculator — estimate your 1RM and get a training percentage chart.

Free online countdown timer with alarm. Set hours, minutes and seconds right in your browser.

Calculate overtime pay at time-and-a-half or double time. Enter hourly rate, overtime hours and pay frequency — free, no signup.

Free ovulation calculator — fertile window, ovulation day, conception and due dates.

See what your raise is really worth. Compare old vs new salary and calculate the percentage increase.

Break down gross pay into taxes and deductions, pay-stub style.

Calculate your take-home pay — enter gross pay, state, and filing status for an estimated paycheck breakdown with 2026 federal, FICA, and state taxes.

Calculate PayPal fees instantly — see the fee, what you keep, or reverse-calculate what to charge so you receive exactly what you want.

Calculate gross pay with overtime for any pay frequency.

Calculate percentages online for free. Find percentages, increases, decreases, discounts, and percentage differences quickly with a simple calculator.

Predict your next period dates — enter your last period and cycle length to see your upcoming 6 periods estimated instantly.

Focus timer with customizable work sessions and breaks.

Track your pregnancy week, due date, and trimester.

Compute event probabilities, combinations and binomial odds.

Solve the unknown value in any proportion (a:b = c:d) by cross-multiplication.

Calculate your daily protein needs in grams. Personalized target based on weight, activity and goal.

Solve for a, b or hypotenuse c with the Pythagorean theorem. Enter any two sides and see the result with steps — free, no signup.

Solve quadratic equations ax² + bx + c = 0 step by step. Shows the discriminant and both roots — free, no signup.

Convert radiology units: gray, sievert, roentgen, becquerel, curie. Free, no signup.

Simplify ratios to lowest terms and solve missing values in proportions.

Find how much rent you can afford on your income, or what income you need.

Compare the true cost of renting vs buying over time.

Check if your resting heart rate is healthy.

Use our Retirement Calculator to estimate savings, future income, and retirement goals. Plan your financial future with accurate results.

Estimate how much a HECM reverse mortgage could pay — enter age, home value, mortgage owed, and rate for an instant estimate.

Find your ring size from mm or use the chart.

Calculate your required minimum distribution instantly — enter your age and last year balance to get your IRS RMD amount.

Estimate roofing materials from roof dimensions and pitch — total area, roofing squares, shingle bundles with waste, and cost. Free, no signup.

Estimate your Roth IRA retirement savings growth.

Calculate running pace, finish time or distance — with pace in min/km and min/mile, speed in km/h and mph. Free, no signup.

Convert hourly wage to yearly salary — see pay per hour, week, month and year.

Convert salary to an hourly rate from pay, hours, and weeks worked. See annual, monthly, weekly, and hourly equivalents.

Add sales tax to a price or extract tax from a tax-inclusive total.

Estimate your SAT score from practice tests. Enter raw scores to predict your 400 to 1600 result.

Estimate the current value of US Series EE and I savings bonds. Enter face value, purchase date and bond type — free, no signup.

See how savings grow with compound interest.

Full scientific calculator with trig and logarithms.

Find the best times to fall asleep and wake up based on natural 90-minute sleep cycles.

Estimate your monthly Social Security retirement benefit for any claiming age from 62 to 70.

Calculate square footage for any room or shape — rectangles, circles, triangles, L-shapes — with multi-room totals and cost estimates.

Calculate riser height, tread depth, and stringer length.

Mean, median, mode, range, variance and standard deviation for any dataset.

Free student loan calculator. Monthly payment, total interest and payoff date.

Calculate subnets from any IP and CIDR. Network, broadcast, host ranges and more.

Enter any Sudoku puzzle and get the instant solution.

Calculate your Total Daily Energy Expenditure. Find your maintenance calories and set diet targets.

Calculate floor tiles and boxes needed for any room with waste allowance.

Free time card calculator: enter clock-in/clock-out times and breaks to calculate daily and weekly work hours, overtime, and gross pay. No signup needed.

Calculate time durations free — hours between two times, add or subtract hours and minutes, convert to decimal hours. No signup, instant.

Convert any time between world time zones instantly.

Free timesheet calculator — weekly hours, overtime and gross pay from clock-in/out times.

Calculate tip amounts, totals and per-person shares in seconds.

Compare tire sizes, diameter differences, and speedometer error.

Compare Traditional and Roth IRA outcomes by age, contribution, return, and tax rate.

Convert length, weight, temperature, volume, speed, area, time, and data units instantly — free online unit converter, no signup.

Estimate 2026 US federal income tax, FICA and take-home pay by filing status.

Calculate VAT online for free. Add or remove VAT from a price, find the VAT amount, and calculate the final price quickly and easily.

Free VO2 max calculator - estimate your cardio fitness score online

Calculate the volume of cubes, cylinders, spheres, cones, pyramids and prisms.

Calculate wallpaper rolls needed for any room size.

Find your recommended daily water intake free — enter your weight, activity level, and climate to get your target in liters and glasses. No signup.

Calculate total hours worked from clock-in, clock-out, and break time.

Convert AAC audio to MP3 free in your browser.

Shrink audio files in seconds. Pick quality and format, keep great sound. Free, private, no signup.

Convert audio files between MP3, WAV, OGG and M4A — free, in your browser, no upload.

Resize video to 480p, 720p, or 1080p — free, in your browser, no upload.

Extract audio from any video as WAV, free in your browser.

Turn animated GIFs into MP4 video — much smaller files, converted in your browser, nothing uploaded.

Convert M4A audio to MP3 free in your browser.

Combine a video file with an audio track — free, in your browser, no upload.

Convert MKV videos to MP4 — fast, free, in your browser, no upload.

Extract MP3 audio from MOV videos free in your browser.

Convert MOV videos to MP4 — fast, free, in your browser, no upload.

Extract WAV audio from MOV videos free in your browser.

Trim MP3 audio to exact start and end points in your browser. Cut ringtones and clips without installing software.

Extract the audio from any video and save it as MP3 — free, in your browser, no uploads.

Extract lossless WAV audio from any video — free, in your browser, no upload.

Convert MP4 videos to WebM format free in your browser.

Remove the audio track from any video in seconds — right in your browser. No upload, no signup, no quality loss.

Convert OGG audio to MP3 free in your browser.

Record voice memos directly in your browser with one click. Play back, download, and share high-quality audio.

Free online screen recorder. Capture your screen, window or tab and download as WebM.

Reduce video file size with adjustable quality — free, in your browser, no upload.

Convert videos to WebM, MP4, or animated GIF online — free, no signup. Your video never leaves your browser.

Turn any video clip into an animated GIF with custom size and frame rate — free, in your browser.

Trim and compress videos online with ease. Remove unwanted sections, reduce video file size, and download the edited video without installing software.

Convert WAV audio to MP3 online. Free, no signup.

Download any YouTube thumbnail in full HD. Paste a link, pick your size, save. Free, no signup.

Add page numbers to PDF online for free with trencada.com. Secure, fast, and easy to use. No registration or software installation needed.

Securely add watermarks to PDFs online for free with trencada.com. Protect your confidential documents with custom text or image watermarks.

Annotate PDFs online for free with trencada. Add text, highlights, comments, and shapes effortlessly. Secure, fast, and no installation required.

Stamp sequential Bates numbers (e.g. ABC-000001) on every PDF page. Free, online, no signup — files never leave your browser.

Reduce PDF file sizes online for free with trencada. Compress bulky PDF documents quickly and securely without losing quality

Create blank PDFs free with Trencada. Pick A4, Letter, or Legal — portrait or landscape, any page count — generated 100% in your browser.

Crop the Aadhaar card strip from your e-Aadhaar PDF and place it on an A4 page — free, print-ready, and 100% in your browser.

Crop PDF files online for free with trencada.com! Remove unnecessary margins, customize page sizes, and improve readability instantly. Fast & Secure!

View PDFs online free with Trencada — open, navigate, and zoom any PDF in your browser. No installs, no signup; files never leave your device.

Rearrange, delete, and organize PDF pages online for free with trencada.com. Fast, secure, and easy to use. No software download needed! Try our Free!

Create fillable PDF forms in your browser. Add text fields, checkboxes, dropdowns, and signatures, then download the result.