Normal Calculator
A standard online calculator for addition, subtraction, multiplication, division and percentages. Works with mouse, touch or your keyboard.
Keyboard: 0–9, + – * / %, Enter for equals, Backspace to delete, Escape to clear.
Recent calculations
Percentage Calculator
Four ways to work with percentages: find a percentage of a number, find what percentage one number is of another, measure a percentage increase or decrease, or compare two values.
Discount & Scheme Calculator
Built for everyday shopping and scheme offers. Find the discount on a purchase, work out a final price from a discount percentage, or find the original price of an item you already bought on offer.
EMI Calculator
A monthly EMI calculator for loans in India: enter the loan amount, annual interest rate and tenure to see your EMI, total interest and full amortization schedule.
Show month-by-month amortization schedule
| Month | Opening balance | EMI | Principal | Interest | Closing balance |
|---|
GST Calculator
Add GST to a base price or remove GST from a final price, using standard Indian GST slabs or a custom rate.
Profit & Loss Calculator
Enter the cost price and selling price of an item to see the profit or loss amount and percentage.
Markup Calculator
Work out the selling price for an item based on its cost price and the markup percentage you want to add.
Tip Calculator
Split a restaurant bill fairly. Enter the bill amount, choose a tip percentage and the number of people paying.
Salary Percentage Calculator
Work out a salary hike or cut in percentage terms, or find your new salary from an old salary and a percentage change.
Calculation History
Your recent results across every calculator on this page, saved only in this browser using localStorage. Nothing is sent to any server.
MBIG Online Calculator – Smart Everyday Calculations
Calculator – MBIG, short for Mind Blowing Ideas of Genius, is a free online calculator from ViraDome.in that brings together the calculators people actually reach for in daily life: a normal calculator, a percentage calculator, a discount calculator, an EMI calculator, a GST calculator, a profit and loss calculator, a markup calculator, a tip calculator and a salary percentage calculator.
Every calculation runs directly in your browser using JavaScript. No amount, salary or loan detail you type is ever sent to a server, which keeps your financial numbers private while still giving you instant results.
The percentage calculator handles the three questions people ask most often: what a percentage of a number is, what percentage one number is of another, and how much a value has increased or decreased in percentage terms. The discount calculator applies the same maths to shopping: given an original price and a final price, it shows the discount amount and percentage in plain rupee terms, and it can also work backwards from a discount percentage to a final price, or from a final price to the original price.
The EMI calculator uses the standard reducing-balance formula banks use for personal loans, home loans and vehicle loans in India, and breaks the result down into a principal-versus-interest split plus a full month-by-month schedule. The GST calculator adds or removes tax at any of the common Indian GST slabs, while the profit and loss, markup, tip and salary percentage calculators cover the smaller everyday sums that would otherwise need a notebook and a pen.
Frequently asked questions
What is a percentage calculator?
A percentage calculator finds a percentage of a number, works out what percentage one number is of another, or measures the percentage increase or decrease between two values.
How do I calculate discount percentage?
Subtract the price you paid from the original price to get the discount amount, then divide that amount by the original price and multiply by 100 to get the discount percentage.
How is EMI calculated?
EMI is calculated from the loan amount, the monthly interest rate and the number of monthly instalments using the formula EMI = P × r × (1+r)^n ÷ ((1+r)^n − 1), where P is the principal, r is the monthly interest rate and n is the number of months.
How do I calculate 15% discount on ₹1,000?
Multiply ₹1,000 by 15 and divide by 100 to get a discount amount of ₹150, which makes the final price ₹850.
How do I calculate GST?
To add GST, multiply the price before tax by the GST rate and add it to the price. To remove GST from a final price, divide the final price by one plus the GST rate expressed as a decimal.
How do I calculate profit percentage?
Subtract the cost price from the selling price to get the profit amount, then divide that amount by the cost price and multiply by 100 to get the profit percentage.