The STCG Calculator is a free online tool that helps you calculate short-term capital gains tax on equity investments. Instead of working through the maths by hand, you enter a few details and get an instant, accurate result — making it easy for investors and traders in India to plan with confidence. Whether you are a first-time investor or an experienced one, the STCG Calculator removes the guesswork and lets you make numbers-backed decisions in seconds. This page explains what the calculator does, the formula behind it, how to use it, a worked example and the key things to keep in mind, so you can make the most of every calculation.
What is Short-Term Capital Gains (STCG) tax?
Short-Term Capital Gains (STCG) arise when you sell listed shares or equity mutual funds held for less than the qualifying long-term period. Equity STCG is taxed at a flat rate with no exemption like LTCG. Understanding this is the first step to using the STCG Calculator effectively, because the quality of your result depends on the assumptions you feed in. Because STCG is taxed more heavily than LTCG, holding a little longer can sometimes materially cut your tax. Once you are clear on the concept, the calculator simply does the arithmetic for you — quickly, consistently and without errors.
How does the STCG Calculator work?
The calculator applies a standard, well-established formula so the result is consistent and reliable. In simple terms, it works out the short-term gain from your buy and sell values and the flat STCG rate on it. The core formula is:
the calculator applies the flat equity STCG rate to your gain. The tool does this instantly and re-calculates the moment you change any input, so you can test different scenarios in seconds — something that would take much longer, and be far more error-prone, on paper or in a spreadsheet.
Why use the STCG Calculator online?
Doing this calculation manually means juggling powers, percentages and long formulas where a single slip changes the answer. The STCG Calculator handles all of that for you and lets you compare multiple scenarios side by side, so you can see exactly how a change in one number affects the outcome. It is the fastest way to turn a rough idea about Short-Term Capital Gains (STCG) tax into a concrete, reliable figure you can plan around — on any device, at any time, for free.
How to use the STCG Calculator
- Enter the buy value and sell value (₹).
- The tool computes the gain.
- See the STCG tax at the flat rate.
- Read the result instantly — adjust any value to compare different scenarios side by side.
STCG Calculator: example calculation
A ₹1,00,000 short-term equity gain is taxed at the flat STCG rate, so the calculator shows the tax payable directly on the full gain. You can reproduce this in the calculator above and then tweak the numbers to match your own situation — that is exactly what makes an online calculator so useful for planning.
Benefits of using the STCG Calculator
- Compute equity STCG tax instantly
- Compare the cost of short vs long holding
- Plan your exit timing
- It is completely free, works on mobile and desktop, and needs no sign-up.
- It removes manual errors and saves the time of doing repeated calculations by hand.
Because you can see the outcome change in real time, the STCG Calculator is as much a learning tool as a planning one: it builds an intuitive feel for how each variable — amount, rate, tenure or price — affects the final number.
Things to keep in mind
STCG on equity has no annual exemption and is usually higher than LTCG, so holding past the long-term threshold can reduce tax significantly. Confirm the current rate. Remember that any calculator is only as good as its inputs and the assumptions built into it. Markets, interest rates, charges and tax rules change over time, so treat the output as a well-informed estimate rather than a guarantee. For decisions involving significant money or tax, confirm the current rules and consider speaking to a qualified financial adviser.
Disclaimer: The STCG Calculator is provided for information and educational purposes only and does not constitute investment, tax or financial advice.