Free online tools that give you the answer as you type
Seventy-eight calculators, converters and text tools. No sign-up, nothing to install, and your numbers never leave your browser.
Pick a category
Eight groups, seventy-eight tools.
Finance
Loans, mortgages, savings, tax, pay and margins.
10 toolsHealth
BMI, calories, macros, pregnancy, running and sleep.
10 toolsText and dev
QR codes, word counts, passwords, JSON, colors and more.
17 toolsEveryday
Units, percentages, dates, time zones, GPA and timers.
16 toolsMath
Scientific calculator, statistics, number bases and more.
5 toolsImages
Compress, resize, convert, rotate, pick colors, remove backgrounds and make a PDF.
9 toolsWeb
Meta tags, snippet preview, UTM links, robots.txt and URLs.
6 toolsHousehold
Paint, area, fuel cost, cooking and electricity.
5 toolsAll 78 tools
Finance calculators
- Loan CalculatorMonthly payment, total interest and payoff date.
- Mortgage CalculatorMonthly payment with tax, insurance, HOA and PMI.
- Compound Interest CalculatorSee how deposits and interest grow over time.
- Savings Goal CalculatorHow much to save each month to reach a target.
- Profit Margin CalculatorMargin, markup and the price that hits your target.
- Salary CalculatorConvert hourly, weekly, monthly and yearly pay.
- Discount CalculatorSale price, savings and percent off.
- Sales Tax CalculatorAdd or remove sales tax, VAT or GST.
- ROI CalculatorReturn on investment and annual growth rate.
- Credit Card Payoff CalculatorTime to pay off a card and the interest it costs.
Health calculators
- BMI CalculatorBody mass index and healthy weight range.
- Calorie CalculatorDaily calorie needs and weight-change targets.
- Body Fat CalculatorEstimate body fat percentage with a tape measure.
- Water Intake CalculatorDaily water needs from weight, exercise and climate.
- Sleep CalculatorBedtimes and wake times based on 90-minute cycles.
- Ideal Weight CalculatorIdeal body weight by four classic formulas.
- Macro CalculatorDaily grams of protein, carbs and fat.
- Pregnancy Due Date CalculatorDue date, weeks pregnant and trimester dates.
- Heart Rate Zones CalculatorMax heart rate and five training zones.
- Running Pace CalculatorPace, finish time and distance for runners.
Text and developer tools
- Word CounterWords, characters, sentences and reading time.
- Case ConverterUppercase, lowercase, title case, camelCase and more.
- Password GeneratorSecure random passwords, made in your browser.
- Lorem Ipsum GeneratorPlaceholder paragraphs, sentences or words.
- JSON FormatterBeautify, minify and validate JSON.
- QR Code GeneratorQR codes for links, text and Wi-Fi.
- Base64 Encoder and DecoderEncode and decode Base64, including Unicode.
- Text Compare ToolHighlight the differences between two texts.
- Color ConverterHEX, RGB and HSL, with a contrast check.
- Unix Timestamp ConverterEpoch time to date and back.
- Word Cloud GeneratorTurn text into a word cloud, sized by frequency.
- Barcode GeneratorGenerate a Code 128 or EAN-13 barcode.
- AI Interview Question GeneratorGenerate and practice interview questions.
- AI LinkedIn Headline GeneratorGenerate LinkedIn headline options.
- Readability Score CheckerCheck the readability score of any text.
- AI Resume BuilderBuild and download a simple, ATS-friendly resume.
- Typing Speed TestTest your typing speed and accuracy.
Everyday calculators and converters
- Unit ConverterLength, weight, temperature, volume and more.
- Percentage CalculatorPercent of, percent change, increase and decrease.
- Age CalculatorExact age in years, months and days.
- Date CalculatorDays between dates, and add or subtract time.
- Tip CalculatorTip, total and cost per person.
- Invoice GeneratorCreate a simple invoice and download it as a PDF.
- AI Resume CheckerScore your resume against a job description.
- AI Cover Letter GeneratorGenerate a cover letter draft from a few details.
- Job Application TrackerTrack job applications on a simple kanban board.
- Salary Negotiation CalculatorCalculate a reasonable counter-offer range.
- Elevator Pitch GeneratorBuild a 30-second pitch about yourself.
- Time Zone ConverterConvert a time between cities and time zones.
- GPA CalculatorSemester and cumulative GPA on a 4.0 scale.
- Random Number GeneratorRandom numbers, a coin flip and dice.
- Online Timer and StopwatchCountdown timer with alarm, and a stopwatch.
- Fraction CalculatorAdd, subtract, multiply and divide fractions.
Math and study tools
- Scientific CalculatorSin, cos, tan, logs, powers, roots and brackets.
- Statistics CalculatorMean, median, mode and standard deviation.
- Number Base ConverterBinary, octal, decimal, hex and bases up to 36.
- Roman Numeral ConverterNumbers to Roman numerals and back.
- Number to Words ConverterNumbers to words, cheque amounts, lakh and crore.
Image tools
- Image CompressorShrink JPG, PNG and WebP files in your browser.
- Image ResizerResize photos to exact pixels or a percentage.
- Image ConverterConvert between JPG, PNG and WebP.
- Image Color PickerPick colors from a photo and get HEX and RGB.
- Rotate and Flip ImageRotate and flip photos and save them.
- Background RemoverCut out the subject of a photo, transparent or solid color.
- Meme GeneratorAdd bold top and bottom text to a photo.
- Watermark AdderAdd a text watermark to protect a photo.
- Image to PDF ConverterCombine photos into a single PDF.
Web and SEO tools
- Meta Tag GeneratorSEO, Open Graph and Twitter tags for your page.
- Google Snippet PreviewPreview your title and description in search results.
- UTM Link BuilderBuild campaign tracking links for Google Analytics.
- Robots.txt GeneratorCreate a robots.txt file for your website.
- URL Encoder and DecoderEncode and decode URLs and query strings.
- CSS Gradient GeneratorBuild a linear or radial CSS gradient visually.
Household calculators
- Cooking Measurement ConverterCups to grams and back for common ingredients.
- Paint CalculatorHow many gallons or liters of paint for a room.
- Area and Square Footage CalculatorArea of rectangles, circles, triangles and more.
- Trip Fuel Cost CalculatorFuel needed and cost for a trip.
- Electricity Cost CalculatorRunning cost of any appliance.
Guides
- How Loan Payments Are Calculated, With ExamplesThe formula, the interest and principal split, and what changes the cost. 4 min read.
- BMI Explained: Categories, Limits and AlternativesWhat BMI measures, what it misses and how to use it sensibly. 3 min read.
- How to Compress Images for Your WebsiteResize, pick a format and set quality, in the right order. 3 min read.
- UTM Parameters Explained: Track Every CampaignWhat each label means and how to name them for clean reports. 3 min read.
- robots.txt and Meta Tags: A Practical SEO GuideCrawling, indexing and display: what each control does. 4 min read.
- Cups to Grams: A Baking Conversion GuideWhy cups do not convert with one number, with a chart of 13 ingredients. 3 min read.
Why people use TavraxTools
Instant results
Every result updates as you type. There is no submit button to press and no page to reload.
Private by design
Calculations run on your device. What you type is not uploaded, saved or shared.
Built for phones too
Big touch targets, numeric keypads and a layout that works on small screens.