Simple Interest Calculator
Calculate non-compounding interest from principal, rate, and time.
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Plan work, compare dates, and run common calculations. Inputs stay in your browser.
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Profit Margin Calculator
Calculate profit and profit margin from cost and revenue.
Open toolIP Subnet Calculator
Inspect an IPv4 CIDR network, mask, broadcast, range, and host count.
Open toolGPA Calculator
Calculate a credit-weighted GPA for two course groups.
Open toolFuel Cost Calculator
Estimate trip fuel required and cost using metric inputs.
Open toolClock Out Calculator
Find when your paid shift ends after paid and unpaid breaks.
Open toolHours Worked Calculator
Calculate paid time between two clock times, including overnight shifts.
Open toolTimesheet Calculator
Add multiple shifts and total regular and overtime hours.
Open toolPercentage Calculator
Calculate a percentage of any number with an instant step-by-step result.
Open toolBMI Calculator
Calculate adult body mass index from metric or imperial height and weight measurements.
Open toolCalorie Calculator
Estimate daily calorie needs from age, measurements, activity, and goals.
Open toolBMR Calculator
Estimate basal metabolic rate with the Mifflin–St Jeor equation.
Open toolPregnancy Calculator
Estimate pregnancy due and conception dates from menstrual dating.
Open toolDue Date Calculator
Estimate a pregnancy due date from the last period and cycle length.
Open toolMacro Calculator
Convert calorie targets and macro percentages into daily gram targets.
Open toolTDEE Calculator
Estimate total daily energy expenditure from BMR and activity.
Open toolGFR Calculator
Estimate adult eGFR with the race-free CKD-EPI 2021 creatinine equation.
Open toolMortgage Calculator
Estimate monthly mortgage payments, total repayment, and interest from amount, rate, and term.
Open toolTime-Zone Converter
Convert a local date and time between IANA time zones with DST support.
Open toolAge Calculator
Calculate exact age in calendar years, months, and days for any comparison date.
Open toolWord Counter
Count words, characters, lines and estimated reading time locally.
Open toolRandom Number Generator
Generate one or many random numbers with custom ranges, decimals, unique values, sorting and downloadable results.
Open toolGUID Generator
Generate secure random UUID v4 identifiers individually or in bulk with custom formatting, case, prefixes and separators.
Open toolPassword Generator
Create secure random passwords locally.
Open toolQR Code Generator
Create customizable QR code images for text, URLs, email, phone, SMS and Wi-Fi, then download PNG or SVG locally.
Open toolLength Converter
Convert nanometres, metric lengths, inches, feet, yards, miles and nautical miles.
Open toolWeight and Mass Converter
Convert metric, US and Imperial mass units including kilograms, pounds, stone and tonnes.
Open toolTemperature Converter
Convert Celsius, Fahrenheit and Kelvin with absolute-zero validation.
Open toolSQL CREATE TABLE and Dummy Data Generator
Design a table with up to 15 columns and generate SQL Server or Oracle CREATE TABLE scripts with up to 1,000 rows of customizable dummy data.
Open toolDraw and Guess
Run a local drawing challenge with privately shared prompts, screen sharing, and a round timer.
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