Everyday Calculators
◆ Everyday ToolsDates, grades, unit conversions, random draws and number-base conversions for the small jobs that come up every week.
GPA Calculator
Grade Point Average on the 4.0 scale, weighted by credit hours, with quality points shown.
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Final Grade Calculator
The score you need on the final exam to reach your target grade, instantly.
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Binary Converter
Binary to decimal, hex, octal and text, both directions, with step-by-step working.
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Hex Converter
Hexadecimal to decimal, binary, octal and text with digit-by-digit expansion shown.
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MM to Inches
Millimeters to inches and back, with the exact 25.4 rule and decimal and ruler-fraction results.
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CM to Inches
Centimeters to inches with feet-and-inches output, perfect for heights and screen sizes.
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Random Number Generator
Whole numbers or decimals in any range, unique-only draws, a name picker for giveaways and ready-made lottery presets, all crypto-secure.
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Age Calculator
Your exact age in years, months and days, plus total months, weeks, days and hours, the weekday you were born on and a countdown to your next birthday.
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Dice Roller
Throw up to twenty animated 3D dice at once, from d4, d6, d8, d10, d12 and d20 to percentile, with modifiers, per-die results and a roll history.
Open calculatorNeed money answers?
Mortgages, loans, car payments, savings and compound interest.
Everyday calculators for the jobs that keep coming up
The everyday calculators handle the small, recurring questions that are quicker to look up than to work out: how old someone is to the day, what mark the final exam needs to be, how many inches a metric measurement really is.
The age calculator counts years, months and days between two dates and lists the milestones ahead. The GPA and grade calculators turn coursework into the number a school actually records, and the cm to inches and mm to inches converters give both the decimal and the nearest practical fraction.
For anything that needs a fair draw or a different number base, the random number generator and dice roller use a cryptographic source with no bias, and the binary and hex converters translate between bases with the place values shown.
Frequently Asked Questions
Are these everyday calculators free to use?
Yes. Every calculator here is 100% free, with no sign-up and no limits, and each one runs entirely in your browser.
Do the calculators show how the answer was worked out?
Yes. Each one shows the formula it applied and a step-by-step calculation box, so you can follow the method and reuse it in exams or at work.
Do they work on mobile phones?
All calculators are fully responsive and touch-friendly, so they adapt to phones, tablets and desktops automatically.
Is my data stored anywhere?
No. Everything is calculated locally in your browser, and nothing you type is uploaded, stored or shared.