Compound Interest Calculator
Model compound growth and simulate trade-by-trade portfolio performance
Compound Parameters
Period-by-Period Breakdown
| Period | Start Balance | Return | Fee | Reinvested | Withdrawn | Contribution | End Balance |
|---|---|---|---|---|---|---|---|
| 1 | $1,000.00 | $20.00 | $0.00 | $20.00 | $0.00 | $0.00 | $1,020.00 |
| 2 | $1,020.00 | $20.40 | $0.00 | $20.40 | $0.00 | $0.00 | $1,040.40 |
| 3 | $1,040.40 | $20.81 | $0.00 | $20.81 | $0.00 | $0.00 | $1,061.21 |
| 4 | $1,061.21 | $21.22 | $0.00 | $21.22 | $0.00 | $0.00 | $1,082.43 |
| 5 | $1,082.43 | $21.65 | $0.00 | $21.65 | $0.00 | $0.00 | $1,104.08 |
| 6 | $1,104.08 | $22.08 | $0.00 | $22.08 | $0.00 | $0.00 | $1,126.16 |
| 7 | $1,126.16 | $22.52 | $0.00 | $22.52 | $0.00 | $0.00 | $1,148.69 |
| 8 | $1,148.69 | $22.97 | $0.00 | $22.97 | $0.00 | $0.00 | $1,171.66 |
| 9 | $1,171.66 | $23.43 | $0.00 | $23.43 | $0.00 | $0.00 | $1,195.09 |
| 10 | $1,195.09 | $23.90 | $0.00 | $23.90 | $0.00 | $0.00 | $1,218.99 |
| 11 | $1,218.99 | $24.38 | $0.00 | $24.38 | $0.00 | $0.00 | $1,243.37 |
| 12 | $1,243.37 | $24.87 | $0.00 | $24.87 | $0.00 | $0.00 | $1,268.24 |
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What Is Compound Interest in Crypto?
Compound interest is the process of earning returns on both your original capital and on previously accumulated profits. In crypto trading and investing, compounding occurs when you reinvest your gains back into your portfolio instead of withdrawing them, allowing each subsequent period's returns to be calculated on a larger balance. This creates an exponential growth curve that can turn modest consistent returns into significant wealth over time.
The power of compounding is often called the "eighth wonder of the world." A 2% monthly return might sound modest, but when compounded over 12 months, it produces a 26.8% annual return. Over 3 years, that same 2% monthly compounds to 101.2%, effectively doubling your capital. The longer you compound, the more dramatic the acceleration becomes, which is why starting early and being consistent are the most important factors in building wealth through compounding.
How to Use the Compound Interest Calculator
Our compound interest calculator helps you project portfolio growth under different compounding scenarios. Enter your initial capital, which is the amount you start with. Set the return per period as the percentage gain you expect to earn each compounding cycle. Choose a compound frequencythat matches your strategy: daily for scalpers or bot traders, weekly for swing traders, monthly for position traders, or yearly for long-term holders and stakers.
The reinvest percentage slider controls how much of your profit is added back to your trading capital. At 100%, all profits compound. Lower values simulate taking regular income from your trading. The additional contributionfield lets you model adding fresh capital each period, similar to a savings plan. The fee percentage accounts for exchange trading fees, platform costs, or performance fees that reduce your effective return.
The results panel shows your projected final balance, total capital invested, total profit generated, cumulative fees paid, total withdrawn profits, and overall ROI. The detailed period-by-period table breaks down each compounding cycle so you can see exactly how your balance grows over time.
Understanding the Trade Simulator
While the compound interest calculator models smooth consistent returns, real trading involves individual trades that either win or lose. The trade simulatormodels this reality by simulating a series of trades based on your defined risk parameters: risk per trade, risk-to-reward ratio, and win rate. It then calculates the cumulative effect on your account balance.
The key insight from the trade simulator is that your edge comes from the combination of win rate and risk-reward ratio, not from either metric alone. A 40% win rate with a 1:3 risk-reward ratio is more profitable than a 60% win rate with a 1:1 ratio. The simulator helps you find the combination that produces the best risk-adjusted growth for your trading style. You can also see how different risk-per-trade percentages affect the volatility of your equity curve.
Compounding Strategies for Crypto Traders
Reinvest systematically, not emotionally. Decide on a reinvestment percentage before you start trading and stick with it. Common approaches include reinvesting 100% for maximum growth, reinvesting 75% and withdrawing 25% as income, or reinvesting 50% and building a separate cash reserve. The discipline of a fixed reinvestment rule prevents impulsive decisions during both winning and losing streaks.
Account for fees and slippage. Real-world compounding always involves friction costs. Exchange trading fees, withdrawal fees, network gas fees, and slippage all reduce your effective return rate. When projecting compound growth, always use your net return rate after fees, not the gross rate. Even a small fee difference of 0.05% per trade can compound into a significant drag on performance over hundreds of trades.
Use the trade simulator for risk management. Before committing real capital to a trading strategy, model it in the trade simulator. Input your expected win rate, risk-reward ratio, and risk per trade to see if the strategy produces positive expectancy. If the simulator shows your account declining or growing too slowly, adjust your parameters before risking real money. This pre-trade analysis can save you from costly trial-and-error with your actual capital.
Combine compounding with dollar-cost averaging. The additional contribution feature allows you to model the combined effect of compounding returns and regular new deposits. This combination is particularly powerful because it adds capital to an already-growing base, further accelerating the compounding effect. Even modest weekly or monthly contributions can have a dramatic impact on your long-term portfolio value when combined with compound growth.