Use free financial calculators from LetsThinkWise to compare trading costs, estimate brokerage charges, understand inflation impact, and plan loan repayment decisions.
Our tools are built for Indian users who want practical answers before making financial decisions. Whether you are comparing stock brokers, checking the cost of a trade, estimating future purchasing power, or planning loan repayment, these calculators help you make better-informed decisions.
Featured tools
Start here — our most-used calculators for comparing brokers and trade costs in India.
Broker Cost Optimizer
Most popularCompare annual trading costs across 18 Indian brokers using your real volumes — delivery, intraday, F&O, currency and commodities.
Best for: Traders and investors who want the lowest-cost broker for their full-year pattern.
- Compare 18 brokers on one dashboard
- Estimate annual brokerage, AMC, DP, GST and API fees
- Segment-wise breakdown across all market segments
Brokerage Calculator
Per tradeCalculate total charges for a single trade — brokerage, STT, GST, stamp duty, DP, net P&L and break-even price across brokers.
Best for: Anyone who wants the real cost of one trade before or after placing it.
- Compare the same trade across 18 brokers
- Net P&L and break-even sell price
- Full statutory charge breakup
Best Demat Account Finder
NewMatch your investor profile and priorities to the best-fit demat brokers — ranked by estimated annual cost, not popularity alone.
Best for: First-time investors and anyone shortlisting Zerodha, Groww, Dhan, Upstox or full-service brokers.
- Five investor profiles with realistic volume presets
- Match score across cost, AMC, API and platform type
- Top 3 picks with plain-language reasons
Trading Tools
Compare broker charges, estimate trade costs, and understand how STT, GST, DP and statutory fees affect your P&L across 18 Indian brokers.
View all trading tools →Broker Cost Optimizer
Most popularCompare annual trading costs across 18 Indian brokers using your real volumes — delivery, intraday, F&O, currency and commodities.
Best for: Traders and investors who want the lowest-cost broker for their full-year pattern.
- Compare 18 brokers on one dashboard
- Estimate annual brokerage, AMC, DP, GST and API fees
- Segment-wise breakdown across all market segments
Brokerage Calculator
Per tradeCalculate total charges for a single trade — brokerage, STT, GST, stamp duty, DP, net P&L and break-even price across brokers.
Best for: Anyone who wants the real cost of one trade before or after placing it.
- Compare the same trade across 18 brokers
- Net P&L and break-even sell price
- Full statutory charge breakup
Best Demat Account Finder
NewMatch your investor profile and priorities to the best-fit demat brokers — ranked by estimated annual cost, not popularity alone.
Best for: First-time investors and anyone shortlisting Zerodha, Groww, Dhan, Upstox or full-service brokers.
- Five investor profiles with realistic volume presets
- Match score across cost, AMC, API and platform type
- Top 3 picks with plain-language reasons
Stock Average Calculator
Calculate average buy price when you purchase the same stock at different prices — with optional P&L and break-even.
Best for: Investors who average up or down, or accumulate shares over multiple buys.
- Up to 20 buy entries
- Per-leg weight and investment breakdown
- Optional all-in break-even with charges
Planning Tools
Estimate inflation impact, loan tenure, and long-term purchasing power with transparent formulas built for Indian users.
View all planning tools →Inflation Impact Calculator
See how inflation erodes purchasing power over time — project future costs and real value of today's money.
Best for: Long-term goal planning, education costs, retirement and SIP targets.
- Future cost and real-value projections
- Preset rates for India CPI bands
- Optional monthly expense projection
Loan Tenure Calculator
Estimate how long it takes to repay a loan given EMI, interest rate and optional prepayment — home, car or personal loans.
Best for: Borrowers comparing EMI vs tenure trade-offs or planning prepayment.
- Remaining tenure from EMI formula
- One-time prepayment simulation
- Interest saved estimate
How Our Calculators Work
LetsThinkWise calculators are built to provide practical estimates using transparent formulas and assumptions. Where possible, we separate different cost components so users can understand how the final result is calculated.
For trading tools, we aim to show broker-specific costs along with statutory charges such as STT, GST, stamp duty, SEBI charges, exchange transaction charges and DP charges.
For planning tools, we use standard financial formulas and clearly show assumptions such as inflation rate, interest rate, time period and repayment amount.
Important Disclaimer
These calculators are for educational and informational purposes only. Financial rules, broker charges, tax rules, interest rates and statutory charges may change over time. Always verify important details from official sources, broker websites, lenders, tax professionals, or financial advisors before making financial decisions.
Frequently Asked Questions
Are these calculators free?
Yes. The calculators on LetsThinkWise are free to use.
Are the results exact?
The calculators are designed to provide practical estimates. Actual charges or results may differ depending on broker rules, exchange updates, taxes, lender policies, rounding methods, and transaction details.
Which calculator should I use to compare stock brokers?
Use the Broker Cost Optimizer for your full-year trading pattern, the Best Demat Account Finder to shortlist brokers by profile, or the Brokerage Calculator for a single trade.
Do you provide investment advice?
No. LetsThinkWise does not provide personalized investment advice, stock recommendations, portfolio management, or guaranteed return claims.
How often are the calculators updated?
We aim to review and update calculator assumptions, broker charges and important formulas periodically. Always check the last updated or last verified information on individual calculator pages.
