🧮 7 free calculators · zero data leaves your browser
Trading Calculators
Position sizing, risk:reward, drawdown, portfolio heat, F&O tax, performance metrics and dividend projections — built specifically for Indian traders & investors.
Position Size Calculator
how many shares / lots to buy
📐
₹
₹
₹
Result
live calculation
📊
Risk Amount
—
Quantity
—
—
Capital Required
—
— of account
Stop Distance
—
— of entry
📐 Formula: Risk Amount = Account × Risk %.
Quantity = Risk Amount ÷ |Entry − Stop Loss|. For F&O, quantity is rounded down to whole lots.
Tip: most professional traders risk 0.5%–2% per trade. Anything above 5% per trade is gambling, not investing.
Risk : Reward Calculator
setup quality scorer
⚖️
₹
₹
₹
₹
Risk : Reward Analysis
setup quality
📊
Risk per Share
—
—%
Reward (T1)
—
—%
R : R Ratio
—
T1 vs SL
Total Risk
—
on full quantity
RISK
REWARD
● SL —● Entry —● T1 —
Insight will appear here.
Drawdown Calculator
recovery math
📉
₹
₹
% / yr
Recovery Required
drawdown ≠ recovery
⛑
Current Drawdown
—
—
Recovery Required
—
to reach peak again
Recovery Time
—
at chosen annual yield
Amount to Recover
—
⚠ The Drawdown Math Trap: a 20% loss requires 25% gain to recover. A 50% loss requires 100% gain. The asymmetry grows brutally — that's why risk management matters more than performance.
Drawdown
Gain Needed to Recover
Pain Index
5%
5.3%
🟢 Minor
10%
11.1%
🟢 Manageable
20%
25.0%
🟡 Painful
30%
42.9%
🟠 Severe
40%
66.7%
🔴 Catastrophic
50%
100.0%
🔴 Year(s) of work
75%
300.0%
🔴 Effectively wiped
Portfolio Heat Calculator
aggregate open risk
🔥
₹
Open Positions
Heat Analysis
aggregate worst case
🌡
Total Risk Exposed
—
Portfolio Heat %
—
Active Positions
0
Capital at Stake
—
Add open positions on the left to compute aggregate heat.
🔥 Rule of thumb:
🟢 Total heat < 6% — safe
🟡 6%–10% — moderate (caution on adding new trades)
🟠 10%–15% — high (avoid new positions, consider scaling out)
🔴 > 15% — danger zone (one bad day can wipe weeks of gains)
F&O Tax Calculator
india · FY26 slabs
🧾
₹
₹
₹
₹
₹
Tax Liability
india AY 2026-27
💰
Business Income (F&O)
—
taxed at slab rates
Slab Tax
—
on slab income
STCG Tax (15%)
—
Total Tax (incl. cess)
—
— effective rate
🧾 F&O is Business Income in India (per ICAI/CBDT). It is NOT capital gains — it is taxed at your slab rate. Loss can be carried forward 8 years and set off against any business income.
Tip will appear here.
⚠ Tax Calculator Disclaimer: This is an indicative computation. It uses standard slab rates without surcharge edge cases, AMT, MAT or rebate u/s 87A. Health & Education cess of 4% is applied. Consult a CA or tax professional for actual filing. F&O turnover-based audit thresholds (44AB) are not computed here.
💡 The DRIP advantage: Reinvesting dividends compounds your share count. Over 10–20 years, the yield-on-cost grows dramatically because growing dividends are paid on more & more shares.
⚠ Tax note: In India, dividends are added to your slab income (no DDT). Yields shown here are pre-tax. Effective income post-tax depends on your slab rate.
About OptionAlgo Trading Calculators
OptionAlgo offers seven free calculators built for Indian F&O and equity traders: position sizing, risk-to-reward, drawdown recovery, portfolio heat, F&O tax (FY26), performance expectancy and dividend projection. Everything runs in your browser — fast, private and free.
Frequently Asked Questions
What calculators does OptionAlgo offer?
Seven free calculators: position sizing, risk-to-reward, drawdown recovery, portfolio heat, F&O tax (FY26), performance expectancy and dividend projection.
Are the calculators free?
Yes. All calculators are free and run entirely in your browser — no login or download required.
Do they cover F&O taxation in India?
Yes. The F&O tax calculator estimates the tax on futures and options income for the current financial year. Figures are estimates for guidance only — confirm with a qualified tax professional.
How does the position-size calculator work?
You enter your account capital, risk-per-trade percentage and stop-loss distance, and it returns the position size and quantity that keep your risk within your defined limit.