Money calculators and guides
Loans, investments, salaries, and tax all run on the same handful of formulas. This is where Plainso's money tools live alongside the guides that explain them.
The money math guide: loans, investments, tax, and pay
Four calculations decide most of your money — what a loan costs, what a SIP earns, how much tax sits on a price, and what your salary is worth per hour. Here is each one, the formula behind it, and the tool to run it.
Calculators and tools
Salary to Hourly Rate Calculator
Turn your annual or monthly pay into a real hourly rate.
MoneyLoan EMI Calculator
Calculate your monthly loan payment instantly.
MoneyGST Calculator
Add or remove GST from any price.
MoneySIP Calculator
Estimate how your monthly SIP could grow over time.
MoneyDiscount Calculator
See what you actually pay after a discount.
MoneyVAT Calculator
Add or remove VAT from any price.
Guides and explainers
GST and EMI calculators every Indian business needs
From GST invoices to loan EMIs, these four calculations decide real money every single week. Get them right with tools built for Indian numbers.
MoneyHow to calculate a discount (and why stacked ones don't add up)
Percent-off math is simple until a second discount is stacked on top. Here are the formulas for a single discount, a final price, and the combined saving — plus the trap that catches most shoppers.
MoneyHow to add or remove VAT from a price
VAT is easy to add and easy to get wrong in the other direction. Here are the two formulas — exclusive and inclusive — and how VAT differs from GST and sales tax.
MoneyHow to convert salary to hourly rate (with the formula)
Salary and hourly rates look like the same number in different units. They are not — paid leave, unpaid weeks, and benefits all change what an hour is actually worth. Here's the honest conversion.
MoneyLoan EMI: how much will you actually pay?
The headline interest rate tells you almost nothing about what a loan costs. Here is how EMI is calculated — and the two numbers that decide whether you are getting a good deal.
MoneySIP calculator: how much to invest monthly to reach your goal
The number that matters is not the return, it's the monthly amount. Here's how SIP compounding actually works, what it takes to reach ₹1 crore, and how to check your own plan in seconds.
Start with the calculator closest to the decision in front of you, then read the guide for the reasoning and the traps. The loan and SIP tools are two sides of one question — what debt and investing really cost you.