Free Online Business Tools
6 tools
Quick, accurate calculators for the numbers that run a small business: GST, profit margin and markup, discounts and everyday percentages.
All Business Tools
GST Calculator
Add or remove GST at 0%, 5%, 18%, 40% or any custom rate, with the CGST and SGST split.
EMI Calculator
Work out the monthly EMI, total interest and repayment schedule for a loan.
SIP Calculator
Estimate what a monthly SIP could grow to, with an optional yearly step-up.
Percentage Calculator
Percentage of a number, increase, decrease and difference in one place.
Discount Calculator
Find the final price, amount saved and percentage saved after a discount.
Profit Margin Calculator
Work out profit, profit margin and markup from cost and selling price.
Calculations you can check
Every business calculator shows the inputs it used and the result of each step, so you can verify the answer or copy it into an invoice or spreadsheet. Money values are rounded to two decimal places only at the end of the calculation, which avoids the small rounding drift that appears when you round at every step.
General tools, not professional advice
These calculators perform arithmetic. They do not know your specific tax situation, the correct rate for your goods or services, or the rules that apply to your business. For tax filing or legal decisions, confirm figures with a qualified professional or the official government source.
Frequently asked questions
Can I use these calculators for invoices?
You can use them to work out amounts quickly, but always verify tax rates and totals against official guidance and your accounting software before issuing an invoice.
Which currency do they use?
Amounts are shown in Indian rupees (INR) with Indian digit grouping, but the arithmetic works for any currency.