Free Online Toolbox

Candle Wax Calculator Work out exactly how much wax and fragrance oil a jar, tin or mold needs — in grams and ounces. Calculators Open Yarn Yardage Calculator Turn a finished weight into yards, or a pattern’s yardage into skeins — with a waste allowance and cost estimate. Calculators Open Etsy Fee Calculator See what you actually keep after Etsy listing, transaction, payment processing and offsite ad fees. Calculators Open Contractor Quote Estimator Build a quote from labour, materials and subcontractors, then add contingency, markup, tax and a deposit. Calculators Open China Annual Bonus Tax Calculator (2026) Compare separate bonus taxation with folding the bonus into annual income, and keep more of your year-end payout. Calculators Open Tip Calculator Split a bill and add the right tip for any percentage, with optional rounding to a whole note. Calculators Open Discount Calculator Find the sale price, the money saved and the real percentage off — including a second discount stacked on top. Calculators Open Sales Tax Calculator Add sales tax to a price or strip it out of a total, with a built-in table of US state base rates. Calculators Open VAT Calculator Pick a country, get its standard VAT or GST rate, and add the tax to a price or extract it from a tax-inclusive total. Calculators Open Stamp Duty Calculator (UK) Work out Stamp Duty Land Tax on an English or Northern Irish home purchase, including first-time buyer relief, the second-home surcharge and the non-resident add-on. Calculators Open Stamp Duty Calculator (Australia) Estimate land transfer duty on a New South Wales, Queensland, South Australian or Western Australian purchase using the marginal bands of each state. Calculators Open IBAN Validator Validate an IBAN with the official mod-97 checksum, see the country, expected length and a grouped format. Nothing leaves your browser. Calculators Open Mortgage Calculator Work out the monthly payment, the total interest and the first-year split between interest and principal for a fixed-rate home loan. Calculators Open Paint Coverage Calculator Estimate litres or gallons of paint from wall area, ceilings, openings, coats and the coverage printed on the tin. Calculators Open Tile Grout Calculator Calculate grout in kilograms from tile size, joint width, tile thickness and the area you are tiling. Calculators Open Roof Pitch Calculator Convert rise and run into x:12 pitch, degrees, slope percentage, rafter length and the roof slope factor. Calculators Open Concrete Stair Calculator Work out risers, treads, total run, stringer length and the concrete volume for a straight staircase. Calculators Open Soil Volume Calculator Turn bed length, width and depth into cubic metres, litres, US gallons and the number of soil bags to buy. Calculators Open Concrete Slab Calculator Work out the concrete, bags and weight for a patio, shed base or driveway slab from length, width and thickness. Calculators Open Wallpaper Calculator Turn room size and wall height into strips, rolls and wall area — with a pattern repeat allowance. Calculators Open Flooring Calculator Get floor area, waste allowance, the number of boxes to buy and the skirting length for any room. Calculators Open Fence Calculator Work out pickets, posts, rails and total board length for a run of fence from spacing and board size. Calculators Open Oven Temperature Converter Turn any oven setting into Celsius, Fahrenheit, Gas Mark and fan oven degrees, so British, European and American recipes match. Calculators Open Tattoo Price Calculator Turn tattoo size, placement and detail level into an hourly estimate, a price range and the deposit to expect. Calculators Open Pet Calorie Calculator Find a dog or cat’s daily calorie target and convert it into grams of food, with a treats allowance. Calculators Open UAE Gratuity Calculator Estimate end-of-service gratuity in the UAE from basic salary and completed years of service. Calculators Open Baby Formula Calculator Get the exact scoop and powder weight for a bottle, or plan a whole day of feeds from your baby’s weight. Calculators Open Coffee Ratio Calculator Scale a brew by ratio: enter your coffee dose or the water you want and get the exact grams, millilitres and cup yield. Calculators Open Cocktail Syrup Calculator Scale simple or rich syrup: enter sugar, water or the yield you need and get exact weights plus the cocktails it covers. Calculators Open Daily Water Intake Calculator Turn body weight, activity level and climate into a daily water target in millilitres, litres, cups and bottles. Calculators Open BMI Calculator Check your body mass index and the healthy weight range for your height, in metric or imperial units. Calculators Open Age Calculator Get your exact age in years, months and days, plus total days lived and the countdown to your next birthday. Calculators Open Sleep Cycle Calculator Pick a bedtime or a wake-up time and see the natural wake times after 4, 5, 6 and 7 sleep cycles. Calculators Open ISO Week Number Calculator Enter a date to get its ISO 8601 week number, week year, weekday and the Monday-to-Sunday range, plus the total weeks in that year. Calculators Open Shoe Size Converter Switch a shoe size between EU, UK, US men, US women, Japan centimetres and Mondopoint millimetres, all anchored on foot length. Calculators Open TDEE Calculator Estimate your basal metabolic rate and daily calorie burn, then see targets for cutting and bulking with a protein, fat and carb split. Calculators Open Long Division Calculator Divide any two numbers and see the quotient, remainder, fraction and every step of the long division. Calculators Open Korean GPA Calculator (4.5 Scale) Convert Korean 4.5, 4.3 and 4.0 grades into one GPA, with course credits and instant scale conversion. Calculators Open Fraction Calculator Add, subtract, multiply or divide two fractions and get the reduced answer as a fraction, a mixed number and a decimal. Calculators Open Percentage Calculator Find a percent of a number, work out what percent one number is of another, or measure the change between two values. Calculators Open Unit Converter Convert length, weight and temperature between metric and imperial units, with the exact factor used for every step. Calculators Open Date Difference Calculator Count the days, weekdays, weeks, months and years between two dates, with the exact gap broken down. Calculators Open Grade Needed Calculator Work out the score the remaining exams and assignments need for the final grade you are aiming for. Calculators Open JSON to YAML Converter Paste JSON and get clean YAML instantly — pick 2 or 4 space indent, keep the original key order or sort keys, all inside your browser. Calculators Open Unix Timestamp Converter Convert a Unix timestamp into UTC and local time, or turn any date and time back into seconds and milliseconds. Calculators Open Base64 Encoder and Decoder Encode text to Base64 or decode it back, with UTF-8 support and an optional URL-safe alphabet — nothing leaves your browser. Calculators Open Aspect Ratio Calculator Resize a video, image or canvas to any aspect ratio and get the missing width or height plus the megapixel count. Calculators Open Data Storage Converter Convert between bits and bytes, KB, MB, GB and TB in both decimal (1000) and binary (1024) units. Calculators Open JSON Formatter, Validator and Minifier Paste JSON to pretty-print it, check it for syntax errors or strip every space, with byte counts before and after. Calculators Open JWT Decoder Paste a JSON Web Token to read its header, payload and exact expiry time — decoded locally, so the token never leaves your browser. Calculators Open MD5, SHA-1 and SHA-256 Hash Generator Turn any text into an MD5, SHA-1 or SHA-256 digest, with correct UTF-8 handling and the digest length spelled out. Calculators Open URL Encoder and Decoder Percent-encode text for a URL or decode an encoded string back to readable text, choosing between full URLs and single query values. Calculators Open Image Compressor Shrink JPG, PNG and WebP photos in your browser — pick a quality level and a max size, then download the smaller file. Nothing is uploaded. Calculators Open Image Resizer Resize a photo to an exact width, height or percentage and download it in JPG, PNG or WebP — the aspect ratio is kept and nothing is uploaded. Calculators Open Image to PDF Converter Turn JPG, PNG and WebP photos into one PDF. Pick A4, Letter or fit-to-image pages, then download the file — the images never leave your device. Calculators Open QR Code Generator Create a QR code for any link or text, choose the size and error-correction level, then download a sharp PNG. Everything is generated locally. Calculators Open