Free & Instant
Everyday calculators, right in your browser
A small, growing set of calculators for everyday life — nothing to install, nothing uploaded, nothing saved to a server.
Age Calculator
Find your exact age in years, months and days from your date of birth — or your age on any other date.
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Date-to-Weekday Finder
Find what day of the week any date falls on — past, present or far in the future.
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Countdown Timer
Create a live countdown to any date and time, and share it with a link — no account needed.
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Tip & Bill Split Calculator
Work out the tip, tax and each person's share of a bill in seconds.
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Working Days Calculator
Count business days between two dates, with your own choice of working weekdays and holidays.
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Discount & Price Comparator
Work out a final sale price, or compare two or more deals to see which is really cheaper per unit.
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Subscription Cost Calculator
Add up what all your subscriptions really cost per week, month and year.
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Monthly Budget Planner
List your income and expenses to see your monthly surplus or deficit at a glance.
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Frequently asked questions
Is any of my data uploaded or saved?
No — every calculator here runs entirely in your browser. Nothing you type is uploaded to a server, and most tools don't save anything at all, even locally; a couple of the list-based tools mention on their own page if they reset when you leave.
Do I need to sign up or install anything?
No — every tool works instantly with no account and no installation, the same as every other tool on Dharmdutt.com.
Are these calculators accurate for every country?
Yes for the date and arithmetic tools — the underlying math doesn't depend on where you are. The Working Days Calculator is deliberately holiday-agnostic: since public holidays vary by country, you supply your own list rather than relying on a single built-in calendar.