Everyday Calculators
Split a tip, find your exact age, or count the days between two dates — fast, free, browser-based everyday math.
Everyday life is full of tiny calculations: how much to tip and what each person owes, how many days until an event, exactly how old you are today. Each is trivial on its own, yet collectively they are the math people reach for a phone to settle.
These calculators answer those questions in a tap, right in your browser. There is no sign-up and nothing you enter — dates, amounts, or names of the day — is ever sent to a server.
They are built to be glanceable: clear inputs, an obvious result, and sensible defaults so you can get the number you need and get on with your day.
Calculators in this category
Tip Calculator
Calculate a tip and split the total across any number of people — see per-person and total amounts instantly.
Open calculator →Age Calculator
Find your exact age in years, months, and days from your date of birth, plus total days lived.
Open calculator →Date Difference Calculator
Count the number of days, weeks, and months between any two dates — perfect for deadlines and planning.
Open calculator →Frequently Asked Questions
What counts as an "everyday" calculator?+
The small calculations that come up away from work: splitting a restaurant bill and tip, figuring out exactly how old someone is, or counting the days until a deadline or between two dates. Quick questions that deserve a quick, correct answer.
How does the tip calculator split a bill?+
Enter the bill amount, choose a tip percentage, and set the number of people. It calculates the tip, the grand total, and the exact amount each person owes — including the tip — so there is no awkward rounding at the table.
How is age calculated exactly?+
The Age Calculator counts full years, then the remaining whole months, then the leftover days from your date of birth to today (or any target date). It accounts for months of different lengths and leap years, so the result is your true calendar age rather than a rough decimal.
Are these calculators private?+
Yes. Dates and amounts you enter are processed entirely in your browser and never sent to a server. Nothing is saved between visits beyond your light/dark theme preference.