Unit Converter
Convert length, weight, area, volume, speed, data, time, pressure, energy and temperature.
Free tools
Converters and calculators
Unit, age, percentage, SIP, FD, loan and date calculators, plus number converters. Free, instant and private.
Age Calculator
Find your exact age in years, months and days, and when your next birthday comes.
Percentage Calculator
Find X% of a number, what percent one number is of another, percentage change and more.
BMI Calculator
Work out your body mass index with WHO and Asia-Pacific categories and a healthy weight range.
Date Difference Calculator
Count the years, months, days and working days between two dates.
Add or Subtract Days
Add or subtract days, weeks, months and years from any date, with working days if you need them.
SIP Calculator
See what a monthly mutual fund SIP could grow to, with an optional yearly step-up.
Lump Sum Return Calculator
Estimate the value of a one-time investment, or find the CAGR of an investment you already hold.
FD Calculator
Work out the maturity amount of a fixed deposit with quarterly, monthly or yearly compounding.
RD Calculator
Work out the maturity value of a recurring deposit with quarterly compounding.
Simple Interest Calculator
Calculate simple interest and the total amount from principal, rate and time.
Compound Interest Calculator
See how a principal grows with yearly, quarterly, monthly or daily compounding.
Discount Calculator
Find the sale price after a discount, a second discount and GST, or the discount a sale price implies.
Profit Margin Calculator
Work out profit margin and markup from cost and price, or the price needed for a target margin.
Salary Hike Calculator
Find your new salary from a hike percentage, or the hike percent in an offer.
Number to Words
Write any number in words, in Indian (lakh, crore) or international style, and as rupees for cheques.
Roman Numeral Converter
Turn numbers into Roman numerals and Roman numerals into numbers, from 1 to 3,999.
Binary, Decimal and Hex Converter
Convert numbers between binary, decimal, octal, hexadecimal and any base up to 36.
Time Zone Converter
Convert a date and time between India and other time zones, with daylight saving handled.
Loan Prepayment Calculator
See how much interest and time a part payment or extra EMI saves on a home, car or personal loan.
Tip and Bill Split Calculator
Add a tip to a restaurant bill and split the total evenly between friends.
Where it helps
Money
SIP, FD, RD, interest, loan prepayment, discount and margin calculators.
Dates and time
Age, date gaps, due dates and meeting times across zones.
Units and numbers
Land, weight and data units, number to words, Roman and binary.
Good to know
Stays in your browser
Every calculation runs on your device; nothing is sent to our servers.
Estimates for money
Finance results are before tax and charges; check with your bank or adviser.
Working shown
Many tools show the formula so you can check the answer by hand.
Built for phones
Quick to load and easy to use at a counter or on a call.
Questions people ask
Which free converters and calculators does Marketiism offer?
Twenty-one: a unit converter, age, date difference and add-days calculators, percentage, discount, profit margin and salary hike calculators, a BMI calculator, SIP, lump sum, FD, RD, simple and compound interest and loan prepayment calculators, number to words, Roman numeral and number base converters, a time zone converter and a tip and bill splitter.
- 21 Tools. All free.
- Lakh Crore, guntha, tola. Indian units and wording.
- 0 Data sent. All in your browser.
- No sign-up No limit. Use them daily.
What converters and calculators are available?
Twenty-one: the unit converter; age, date difference and add or subtract days; percentage, discount, profit margin and salary hike; BMI; SIP, lump sum return, FD, RD, simple interest, compound interest and loan prepayment; number to words, Roman numerals and number base; a time zone converter; and a tip and bill splitter. Each has its own page.
Are these tools free?
Yes. There's no sign-up, no watermark and no daily limit on use. Marketiism, which makes business software for Indian small businesses, keeps them free because they help with everyday sums, whether or not you ever use the software. Use them for personal, business and client work.
Is anything I type sent to your servers?
No. Every calculation runs in your browser, so the numbers, dates and amounts you enter never leave your device. Nothing is stored after you close the page. That matters for salaries, savings, loan details and dates of birth, which you may not want to share with any website.
Which tools help with savings and investments?
The SIP calculator for monthly mutual fund investing, the lump sum return calculator for one-time investments and CAGR, the FD and RD calculators for bank deposits, and the compound interest calculator. The India tools add PPF and EPF calculators for long-term government-backed savings. All of them show results before tax and charges.
Which tools help with loans?
The loan prepayment calculator shows how much interest a part payment or extra EMI saves, and whether to shorten the tenure or lower the EMI. The EMI calculator works out a monthly instalment with a full schedule, and the simple interest calculator suits short private loans.
Which tools help a shop or small business?
The discount calculator for sale prices with GST, the profit margin calculator for pricing, the percentage calculator for growth figures, the number to words converter for invoices and cheques, and the add days calculator for payment due dates. The GST and invoice tools fit alongside them.
Which tools help with dates and time?
The age calculator gives exact age in years, months and days. The date difference calculator counts the days and working days between two dates. The add or subtract days tool finds a future or past date, and the time zone converter shows a time in about 30 cities at once.
Do the tools use Indian units and number formats?
Yes. The unit converter includes guntha, cent, marla, kanal, bigha, tola and quintal. Number to words writes amounts in lakh and crore and in rupee cheque style. Money results use rupee formatting with Indian digit grouping, such as ₹1,25,000, instead of the international style. Dates follow the day-month-year order.
Are the finance calculators accurate?
They use the standard formulas banks and fund houses use, such as quarterly compounding for FDs and reducing balance for loans. Results are before tax and charges, and actual bank figures can differ by a few rupees. Treat them as planning estimates and check with your bank or adviser.
Is this financial advice?
No. The calculators show the maths for the numbers you enter. They don't know your goals, your tax position or the risks of a particular product. For important decisions about investments, loans or tax, speak to a SEBI-registered adviser or a chartered accountant first. Use the results as a starting point for that conversation.
Do the tools work on a phone?
Yes. Every tool is built for phones, with large tap targets, the number keypad for amounts and results at the top. They load quickly on mobile data and need no app. Many people use them at a shop counter, at the bank or during a call with a client.
Do I need to install anything?
No. The tools run in any modern browser on a phone, tablet or computer. There's no app, plug-in or download. Bookmark the ones you use often, or add this page to your phone's home screen so the whole set of calculators is one tap away whenever you need them.
Who makes these tools?
Marketiism, an Indian company that builds software that runs WhatsApp, billing, a CRM and bookings for small businesses. Our team also offers digital marketing services. The free tools are our way of helping with everyday work, and you never need an account to use them.
How is Marketiism different from these free tools?
The free tools each do one job on one screen. Marketiism is a full system for running a business: a shared WhatsApp inbox with an AI assistant, GST billing, an online shop, bookings, a CRM and reports. It has a free trial, and our team can set it up for you as a paid service.
Can I suggest a new calculator?
Yes, please do. Use the contact page to tell us what you'd like to calculate and how you'd use it. We add new tools based on what small businesses and their customers actually need, and we read every suggestion, including ones for better Indian units or formats.