Free & Instant
Everyday calculators, right in your browser
A growing set of calculators for money, health, dates and 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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EMI Calculator
Monthly EMI, total interest and a year-by-year or month-by-month repayment schedule for any loan.
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SIP Calculator
See what a monthly SIP or a one-time lumpsum could grow to, with an optional yearly step-up.
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Simple & Compound Interest
Compare simple and compound interest side by side for fixed deposits, savings and loans.
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GST Calculator
Add GST to a price or remove it from a GST-inclusive amount, with the CGST, SGST and IGST split.
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Percentage Calculator
Percent of a number, percent change, and increasing or decreasing a value by a percentage.
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BMI Calculator
Body Mass Index with Asian and WHO ranges, plus the healthy weight range for your height.
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Unit Converter
Length, weight, temperature, area, volume, speed, time and data — including acres, tola and gaj.
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Date Calculator
Find the date a number of days, weeks, months or years before or after any date.
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RD Calculator
Maturity amount and interest on a recurring deposit, with quarterly compounding like Indian banks.
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PPF Calculator
Estimate a Public Provident Fund balance after 15 years or longer from your yearly deposit.
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CAGR Calculator
Find the steady yearly growth rate between two values, or the final value from a rate.
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Inflation Calculator
See the future cost of something, or how much your money will really buy, as prices rise.
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HRA Calculator
Work out how much House Rent Allowance is tax-exempt using the standard three-way rule.
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Profit Margin & Markup
Profit, margin and markup from cost and price, or the price needed for a target margin.
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Calorie Calculator
Estimate your BMR and the daily calories to maintain, lose or gain weight.
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CGPA to Percentage
Convert CGPA to percentage and back (CBSE uses 9.5), or turn marks into a percentage.
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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.