All tools
76 free calculators and converters across 9 categories. No signup, no uploads, and no data stored.
Finance
View all- Loan EMI CalculatorWork out the monthly payment, total interest and full amortisation schedule for any loan.
- Compound Interest & SIP CalculatorProject how a recurring monthly investment or a lump sum grows, with a year-by-year breakdown.
- In-Hand Salary Calculator (CTC to Take-Home)Convert annual CTC to monthly take-home with employer EPF, gratuity, professional tax, ESI and income tax, comparing the old and new regime.
- Gratuity CalculatorStatutory gratuity under the Payment of Gratuity Act with the 15/26 formula, the five-year eligibility test and the tax exemption, with the working shown.
- Credit Card Payoff & Minimum Due CalculatorSee how long a card takes to clear on minimum payments, month by month, including 18% GST on the interest, then compare it with a fixed monthly payment.
Business
View all- Discount & Profit Margin CalculatorWork out the real margin on a sale, the effect of a discount, and the price you need to charge.
- GST & VAT CalculatorAdd tax to a net price or extract it from a gross price, with a full rate table.
- Volumetric Weight CalculatorFree volumetric weight calculator for any parcel. Chargeable weight, CBM and billing slab for courier divisors 5000, 6000 and 4000, in your browser.
- COD vs Prepaid Profit CalculatorCompare cash on delivery and prepaid profit after RTO, forward and reverse freight, handling fees and remittance delay. Finds the break-even RTO rate.
- Units Per Carton CalculatorWork out units per inner pack and master carton, cartons needed for an order, pallet count and volume efficiency for any product size.
- Barcode Check Digit Calculator & ValidatorCalculate or validate the GS1 Mod-10 check digit for EAN-13, UPC-A, GTIN-8 and ITF-14 codes, in bulk, with the algorithm explained step by step.
- Reorder Point & Safety Stock CalculatorCalculate your reorder point, safety stock and economic order quantity from lead time and daily usage, with days of cover and the date to reorder by.
Math
View all- Percentage CalculatorHandle every common percentage question: what percent of, percent change, and reverse percentages.
- Fraction CalculatorFree fraction calculator that adds, subtracts, multiplies and divides fractions with whole numbers, and simplifies the answer to lowest terms.
- Scientific CalculatorFree online scientific calculator with sin, cos, tan, logarithms, roots, powers, factorials and degrees/radians mode. No signup, keyboard ready.
- Ratio CalculatorSimplify ratios, scale them up or down and solve proportion problems like A:B = C:D. Step-by-step working shown for cooking, maps and scale models.
- Number Base ConverterConvert between binary, decimal, hexadecimal, octal and any base from 2 to 36. Shows the positional working for each digit.
Conversion
View all- Metric & Imperial Unit ConverterConvert length, mass, volume, area, speed and temperature between metric and imperial.
- Area & Land Size ConverterConvert land and floor area across square metres, feet, acres, hectares and South Asian units.
- Length ConverterConvert millimetres, centimetres, metres, kilometres, inches, feet, yards and miles in both directions. Exact factors with a reference table.
- Weight ConverterConvert kilograms, grams, metric tons, pounds, ounces and stones both ways. Exact 2.20462 factor with common-weight reference table.
- Temperature ConverterConvert Celsius, Fahrenheit and Kelvin instantly, with the exact formula, freezing/boiling points and a comparison chart for common temperatures.
- Height Converter — Feet, Inches & CentimetresConvert height between feet, inches and centimetres in either direction. Enter feet and inches together, get cm and the decimal feet value.
- Volume & Liquid ConverterConvert litres, millilitres, gallons, quarts, cups, fluid ounces and tablespoons. US and imperial measures both supported.
- Data Size ConverterConvert bits, bytes, KB, MB, GB and TB using both decimal (SI) and binary (IEC) definitions, so file sizes match what your device actually shows.
Date & time
View all- Age & Date Difference CalculatorCalculate exact age in years, months and days, or the interval between any two dates.
- Business Days CalculatorCount working days between two dates, add business days, or total a month. Your weekend pattern, your holidays, and the Excel NETWORKDAYS convention.
- Time Zone Meeting OverlapFind the hours two cities actually share in a working day, at the date you choose. Real DST offsets, honest no-overlap answers, and a rotation when thin.
- Order Cut-Off Date CalculatorWork backwards from the date a parcel must arrive to the last day you can order it, through transit, handling days, courier closed days and holidays.
- Payment Terms CalculatorTurn net 30, EOM and 2/10 net 30 into the date a term actually produces, naming the trigger and showing the 30-day spread one ambiguous clause can hide.
- Overtime Calculator — India Labour CodesOvertime under the India Labour Codes, with the daily and weekly routes both shown and the more favourable to the worker applied, as s.27 requires.
- ISO Week Number CalculatorISO 8601 week numbers, with the two rival conventions side by side. 2026 has 53 ISO weeks, not 52, so check your 52-week assumption.
- Payroll Cut-Off Date BuilderBuild your payroll month: attendance cut-off, run date, salary credit, TDS by the 7th, EPF and ESI by the 15th, and the LOP divisor.
Image
View all- Image CropperCrop by dragging, by aspect ratio, by exact pixels, by percentage, by auto-trimming blank edges, or split into a grid of tiles.
- Compress Image to Exact KBHit an exact file-size target such as 20KB, 50KB or 100KB without guessing or losing legibility.
- Image Resizer to Exact PixelsResize to an exact width and height, with a choice of fit, fill, or stretch, plus optional format conversion.
- Image Format ConverterConvert HEIC, AVIF, WebP, JPEG, PNG or GIF to JPEG, PNG or WebP, including iPhone HEIC photos, with a quality control for lossy formats.
- Image Metadata RemoverStrip EXIF data from a photo before sharing it, so GPS coordinates, device model and timestamps are not published.
- Print Size CalculatorTurn pixel dimensions into a print size at any PPI, and see which axis limits the fit to a real sheet of paper.
- Image HistogramFour 256-bin histograms with BT.601 luminance, plus a clipping map that shows where highlights actually blow out.
- EXIF ViewerA byte-level EXIF reader with no dependency: camera settings, GPS in degrees, and the thumbnail privacy trap, read on device.
- Favicon GeneratorBuild a multi-size favicon.ico, apple-touch-icon and web app manifest, then read the ICO back as a hex breakdown.
- Social Media Image ResizerSixteen placements with the part of your image that survives each crop, plus Open Graph tags and the YouTube size correction.
- Perceptual Image HashaHash, dHash and pHash with Hamming distance, calibrated so 32 bits apart is coincidence rather than a match.
- Product Photo Spec CheckerCheck one product photo against marketplace pixel, format and background rules, and see exactly what cannot be measured.
- BlurHash & LQIP GeneratorEncode a BlurHash, a ThumbHash that keeps alpha, or a 24px WebP LQIP. Length depends only on the component count.
Developer
View all- JSON Formatter & ValidatorPretty-print, minify, and validate JSON with precise error locations.
- Base64 Encoder & DecoderEncode text or files to Base64 and decode it back, handling UTF-8 correctly in both directions.
- Hash Generator (SHA-256)Compute SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text, computed locally.
- UUID Generator (v4 & v7)Generate random UUIDs in bulk, version 4 for randomness or version 7 for time ordering.
- Password & passphrase GeneratorGenerate strong random passwords and passphrases, with an entropy estimate.
- Unix Timestamp ConverterConvert Unix timestamps to human dates and back, in seconds, milliseconds, and other formats.
- JWT DecoderDecode a JSON Web Token to inspect its header and payload, entirely in your browser.
- URL Encoder & DecoderPercent-encode and decode URLs, query parameters, and reserved characters safely.
- Regular Expression TesterTest JavaScript regular expressions with live match highlighting and capture group breakdown.
Text
View all- Invisible Character RemoverFind and remove the characters hiding in your text: zero-width spaces, invisible Unicode, bidirectional overrides and lookalike letters.
- Social Media Character CounterCount a post the way each platform counts it: X link weight, grapheme clusters for Instagram, UTF-16 for TikTok, GSM-7 SMS segments.
- Case Converter for Titles, Sentences & CodeAn editorial rules engine, not a toUpperCase call: AP and Chicago small-word tables, acronyms kept as written, brands like iPhone protected, plus camel.
- URL Slug GeneratorA documented RFC 3986 pipeline: pre-map what NFKD will not decompose, strip marks, transliterate Devanagari and Tamil, truncate at a word boundary.
- Find and Replace with RegexThe replacement half of regex: capture groups, a literal dollar that silently eats text, lookahead, the missing g flag, and a dry run before applying.
- Text Diff CheckerCompare two texts line by line or word by word, with normalisation first so CRLF, tabs and a BOM do not read as changes, plus unified diff output.
- Number to Words (Indian System)Both directions, both numbering systems: lakh, crore, arab and kharab beside million and billion, a proper cheque line, and a words-to-number verifier.
- Readability Checker & Text StatisticsFive formulas with their assumptions shown, plus word, sentence and reading-time counts. Honest about a syllable heuristic wrong on 5-10% of words.
- CSV CleanerParses RFC 4180 by hand, detects the delimiter by column-count consistency not frequency, reports ragged rows by index, keeps destructive fixes off.
- PDF Page Counter & InfoCount pages, measure the page size in points and millimetres, read the version, list metadata and check whether fonts are embedded. Nothing is uploaded.
- PDF Metadata Remover & EditorRead, edit or remove the author, title, creator, producer and timestamps a PDF declares about itself, and see what a remover leaves behind.
- Merge PDF FilesCombine any number of PDFs into one document, in an order you set by dragging. Runs in your browser, so nothing is uploaded.
- JPG to PDF ConverterTurn JPG, PNG and WebP images into a single multi-page PDF, with correct A4 or Letter sizing and the right resolution for print.
- Split PDFPull pages or ranges out of a PDF as separate files, using expressions like 1-3,5 or -3. The matching pages are previewed before anything is written.
- Delete PDF PagesRemove pages you do not want and keep the rest, with a live preview of what will be removed. The reverse action is one click, because deletion has no undo.
- Rotate PDF PagesRotate all pages or just the sideways ones, and see beforehand whether a page is genuinely landscape or merely flagged as rotated.
- Crop PDF PagesTrim white margins, crop to a photo or card size, or set the crop and trim boxes a print shop reads. Auto-trim detects the content edge.
- Change PDF Page SizeConvert a PDF between A4, US Letter, Legal and custom sizes, scaling the content to fit and centring it rather than cropping the edges off.
- Add Page Numbers to PDFNumber the pages of a PDF as 7 or as page 7 of 42, in roman or letters, starting anywhere, skipping the cover and placing each number precisely.
- Watermark PDFStamp a text or image watermark behind your page content, tiled so it cannot be cropped away. Notes honestly that any watermark can be removed.
- Flatten PDFBake form fields and annotations into the page so a document prints and opens identically everywhere. Lists exactly what it will remove first.
Part of ullass. Every tool is free and runs locally in your browser.