38 free tools, zero sign-up
Fast, free online tools that just work
Calculators, text tools, generators and converters. No pop-ups, no logins, no clutter. Pick a tool, get your answer, and read the plain-English explanation if you want to understand the how.
Calculators
Money, time, math and everyday number crunching.
Tip Calculator Work out the tip and split any bill in seconds. Time Card Calculator Add up a week of hours, breaks, overtime, and pay in seconds. Peptide Reconstitution Calculator Turn vial size, water, and target dose into the exact units to draw on an insulin syringe. Tirzepatide Reconstitution Calculator Convert a tirzepatide vial, water, and dose into exact insulin-syringe units. Semaglutide Reconstitution Calculator Convert a semaglutide vial, water, and dose into exact insulin-syringe units. Retatrutide Reconstitution Calculator Convert a retatrutide vial, water, and dose into exact insulin-syringe units. BPC-157 Reconstitution Calculator Convert a BPC-157 vial, water, and microgram dose into exact insulin-syringe units. Percentage Calculator Find a percentage, a share, or a percent change in seconds. GPA Calculator Turn your letter grades and credits into a weighted 4.0 GPA. Age Calculator Find your exact age in years, months, and days from any date of birth. Date Calculator Count the days between dates, or add and subtract from any date. Fraction Calculator Add, subtract, multiply, and divide fractions with reduced results. Pregnancy Due Date Calculator Estimate your due date and gestational age from your last period. Square Footage Calculator Calculate square footage for rooms and areas in feet, inches, yards or meters. Hours Calculator Work out the hours and minutes between a start and end time, minus any break. Concrete Calculator Estimate concrete volume in cubic yards, bag counts and cost for slabs and columns. Ratio Calculator Solve proportions for a missing value and simplify ratios to lowest terms. Percentage Increase Calculator Find the percent increase or decrease between two numbers, or apply one to a value. Discount Calculator Find sale prices and savings from a percent off, or stack discounts and add tax. Margin Calculator Calculate gross margin, markup and selling price from cost, and see margin vs markup. Car Payment Calculator Estimate your monthly car loan payment, total interest and loan cost. Average Calculator Find the mean, median, mode, range, sum and count of any list of numbers. Due Date Calculator Estimate your due date from LMP, conception or IVF, with gestational age and trimester. Ovulation Calculator Estimate your ovulation day and fertile window from your last period and cycle length. Period Calculator Predict your next periods and cycle dates from your last period and cycle length. TDEE Calculator Estimate daily calorie needs (TDEE and BMR) with cutting and bulking targets.
Text Tools
Translate, transform and count text in your browser.
Generators
Generate names, usernames and random picks instantly.
Random Name Generator Generate realistic random first and last names, with gender and quantity options. Username Generator Generate catchy, unique usernames from adjectives, nouns, numbers and your own keyword. Password Generator Create strong, random passwords with your choice of length, letters, numbers and symbols. Fake Name Generator Generate a full fictional identity: name, address, email, phone and birth date. Random Letter Generator Pick random letters A-Z with case, vowel/consonant and no-repeat options.
Converters
Convert between formats like binary, text and more.
Developer Tools
Barcodes, encoders and utilities for builders.
Barcode Generator Generate a scannable Code 39 barcode from any text or number, and download it. Base64 Encode and Decode Encode text to Base64 and decode it back, UTF-8 safe and fully in-browser. Epoch Converter Convert Unix timestamps to dates and back, in seconds or milliseconds, with live epoch time.
Random & Fun
Spinners and quick decision makers, just for fun.
Runs in your browser
Every calculation happens on your device. Nothing you type is sent to a server.
Explained, not just answered
Each tool shows the formula, worked examples, and answers to common questions.
Always free
No account, no paywall. Bookmark what you need and come back anytime.