12 Professional Calculators

Financial Calculators

Professional tools to plan your investments, analyze returns, and make smarter financial decisions.

Compound Interest Calculator

See how your investment grows over time with reinvested returns

Formula

A = P(1 + r/n)^(nt) + M × [(1 + r/n)^(nt) − 1] / (r/n)

Where P = principal, r = annual rate, n = compounds/year, t = years, M = monthly contribution

Tips

Monthly compounding grows wealth faster than annual — even with the same rate.
Adding even a small monthly contribution dramatically increases your final value.
Time is your biggest asset — starting 5 years earlier can double your outcome.

Investment Return Calculator

Calculate ROI and annualized returns from a buy/sell trade

Formula

ROI = (Final − Initial + Dividends) / Initial × 100
CAGR = (Final / Initial)^(1/years) − 1

Tips

CAGR smooths out volatility to show a consistent annual growth rate.
Include dividends received for a true total return picture.
Compare your CAGR against the S&P 500 (~10% historically) as a benchmark.

Position Size Calculator

Calculate the ideal position size based on your risk tolerance

Formula

Shares = (Account × Risk%) / |Entry − Stop|

Tips

Most professional traders risk no more than 1–2% of their account per trade.
Place your stop-loss at a technically meaningful level, not an arbitrary distance.
Consistent position sizing is the foundation of long-term capital preservation.

Crypto Profit / Loss Calculator

Calculate profit, loss, and ROI on any crypto trade

Formula

P/L = (Sell − Buy) × Amount − Fees
ROI = P/L / (Buy × Amount) × 100

Tips

Exchange fees (0.1–0.5%) can significantly eat into profits on high-volume trades.
Always account for both buy and sell fees in your break-even calculation.
Crypto gains may be subject to capital gains tax depending on your jurisdiction.

Dollar-Cost Averaging Calculator

Model recurring fixed investments over time

What is DCA?

Dollar-Cost Averaging means investing a fixed amount at regular intervals regardless of price — reducing the impact of volatility over time.

Tips

DCA removes the stress of trying to time the market perfectly.
Weekly investing compounds faster than monthly due to more frequent purchases.
Automate contributions so emotions don't interrupt your strategy during downturns.

Risk / Reward Calculator

Evaluate the risk-to-reward ratio of any trade

Formula

Ratio = |Target − Entry| / |Entry − Stop|

Tips

A ratio of 2:1 or higher is generally considered a good trade setup.
Even with a 40% win rate, a 2:1 ratio keeps you consistently profitable.
Never enter a trade with a ratio below 1:1 — the math doesn't work in your favor.

Dividend Income Calculator

Estimate annual and monthly dividend income from your holdings

Formula

Annual Income = Price × Shares × (Yield / 100)

Tips

Look for companies with consistent dividend growth, not just the highest yield.
A very high yield (above 6–8%) may signal a dividend cut is coming.
Reinvesting dividends (DRIP) accelerates compounding significantly over time.

Break-Even Calculator

Find the price at which you neither profit nor lose

Formula

Break-Even = (Buy × Shares + Buy Fee + Sell Fee) / Shares

Tips

Always include both buy and sell commissions — they raise your break-even price.
Knowing your break-even helps you set realistic profit targets and stop-losses.
Zero-commission brokers eliminate fee drag and lower your break-even point.

FIRE Calculator

Financial Independence, Retire Early — find your FIRE number

What is FIRE?

Financial Independence, Retire Early. The FIRE number is the portfolio size at which you can safely live off investment returns indefinitely.

FIRE Number = Annual Expenses / Safe Withdrawal Rate

Tips

The classic safe withdrawal rate is 4% (the "4% rule") from the Trinity Study.
Reducing annual expenses by $5,000 cuts your FIRE number by $125,000 at 4% SWR.
Consider a 3–3.5% SWR for early retirees to account for longer time horizons.

Capital Gains Tax Calculator

Estimate your capital gains tax liability on investments

Short vs Long Term

Assets held under 1 year are taxed as ordinary income. Assets held over 1 year qualify for lower long-term capital gains rates.

Tips

Holding an asset just one extra day past 12 months can significantly reduce your tax.
Tax-loss harvesting (selling losers) can offset gains and reduce your tax bill.
This is an estimate — consult a tax professional for your specific situation.

Margin Calculator

Calculate margin requirements, leverage, and liquidation price

Formula

Required Margin = Position Value / Leverage
Liq. Price ≈ Entry × (1 − 1/Leverage)

Tips

Higher leverage amplifies both gains and losses — use it cautiously.
Always keep a buffer above the maintenance margin to avoid auto-liquidation.
Beginners should stick to 2–5× leverage until they understand the risk dynamics.

Inflation-Adjusted Return Calculator

Find the real return of your investment after inflation

Formula

Real Rate = ((1 + Nominal) / (1 + Inflation)) − 1

Tips

A 7% return with 3% inflation gives you only ~3.9% real purchasing power growth.
Equities historically outpace inflation; cash savings often lose real value over time.
Use TIPS (Treasury Inflation-Protected Securities) to hedge against inflation risk.

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