Crypto Compound Interest Calculator
Calculate compound interest for your crypto investments. See how different compounding frequencies affect your returns.
Investment Details
Starting amount
Annual percentage rate
Investment duration
Additional monthly investment (optional)
Final Value After 5 Years
$78,054
$38,054 interest earned
Breakdown
Yearly Growth
What is Crypto Compound Interest?
Crypto compound interest is the process of earning interest on both your initial investment and on previously accumulated interest within cryptocurrency protocols. Unlike simple interest, where you earn returns only on your principal, compound interest reinvests your earnings to generate exponential growth over time. In the crypto space, this is commonly encountered in DeFi lending protocols, staking rewards, yield farming, and savings accounts offered by centralized platforms.
The key difference between APR (Annual Percentage Rate) and APY (Annual Percentage Yield) is compounding. APR represents the simple annual rate, while APY accounts for the effect of compounding within a year. A DeFi protocol advertising 20% APR with daily compounding actually yields approximately 22.14% APY, because each day's interest is added to the principal and earns interest the next day.
This calculator lets you model compound interest on crypto investments with different compounding frequencies (continuous, daily, weekly, monthly, quarterly, yearly) and optional monthly contributions. It shows the total value, interest earned, effective APY, and provides a year-by-year growth breakdown so you can visualize how your crypto holdings grow over time.
The Compound Interest Formula
The compound interest formula calculates the future value of an investment that earns interest compounded at regular intervals. When monthly contributions are included, the future value of those contributions is calculated separately using the future value of an annuity formula and added to the principal's growth.
Compound Interest Formula
Where:
- A= Final amount after all compounding periods
- P= Initial principal investment in USD
- r= Annual interest rate (APR) as a decimal
- n= Number of compounding periods per year
- t= Time period in years
- C= Monthly contribution amount in USD
How to Use This Calculator
Follow these steps to calculate compound interest on your crypto investments:
- Enter Initial Investment: Input the starting amount of USD or stablecoins you plan to invest.
- Set Annual Interest Rate (APR): Enter the stated annual rate from your DeFi protocol, staking platform, or yield farm. Use the quick-select buttons for common DeFi rates (5% to 200%).
- Choose Compounding Frequency: Select how often interest is compounded. Most DeFi lending protocols compound daily, while staking rewards may compound at different intervals.
- Set Time Period: Enter the investment duration in years. Longer periods dramatically illustrate the power of compounding.
- Add Monthly Contributions (Optional): If you plan to add funds regularly, enter the monthly contribution amount to see its impact on total returns.
- Review Results: The calculator shows the final value, total interest earned, APY, and a year-by-year growth table.
Understanding the Results
The final value combines your initial investment growth with the future value of all monthly contributions. The interest earned is the total return above everything you invested (principal plus contributions). The APY shows the effective annual yield after accounting for compounding, which will always be higher than the stated APR when compounding occurs more than once per year.
The yearly growth table shows the portfolio value at the end of each year, along with cumulative interest earned. This helps you visualize how compounding accelerates returns over time. In early years, growth is modest, but it accelerates as compounding builds upon itself.
The effective rate metric shows the actual annualized return on your total investment (principal plus contributions), giving you a clearer picture of your true investment performance when you are making regular deposits.
How Compounding Frequency Affects Returns
The more frequently interest compounds, the higher the effective APY. This is because interest is calculated and added to your balance more often, meaning each compound period starts with a slightly larger principal.
| Compounding | Periods/Year | APY from 20% APR | Extra vs Yearly |
|---|---|---|---|
| Yearly | 1 | 20.00% | Baseline |
| Quarterly | 4 | 21.55% | +1.55% |
| Monthly | 12 | 21.94% | +1.94% |
| Weekly | 52 | 22.09% | +2.09% |
| Daily | 365 | 22.14% | +2.14% |
| Continuous | ā | 22.14% | +2.14% |
At a 20% APR, the difference between yearly and daily compounding is 1.14% APY, which on a $100,000 investment means an extra $1,140 per year.
Worked Examples
5-Year DeFi Investment
Problem:
Invest $10,000 in a DeFi lending protocol at 20% APR with daily compounding and $500 monthly contributions.
Solution Steps:
- 1P = $10,000, r = 0.20, n = 365, t = 5 years, C = $500/month
- 2APY = (1 + 0.20/365)^365 - 1 = 22.14%
- 3Principal growth: $10,000 Ć (1 + 0.20/365)^(365Ć5) = $27,179
- 4Contribution growth: $500 Ć ((1 + 0.20/12)^60 - 1) / (0.20/12) = $43,878
- 5Total value: $27,179 + $43,878 = $71,057
- 6Total invested: $10,000 + ($500 Ć 60) = $40,000
- 7Interest earned: $71,057 - $40,000 = $31,057
Result:
$71,057 total value, $31,057 interest earned on $40,000 invested
Monthly Compounding vs Simple Interest
Problem:
Compare compound (monthly) vs simple interest on $5,000 at 12% APR for 3 years.
Solution Steps:
- 1Simple interest: $5,000 Ć 0.12 Ć 3 = $1,800
- 2Compound (monthly): $5,000 Ć (1 + 0.12/12)^36 = $7,148
- 3Compound interest earned: $7,148 - $5,000 = $2,148
- 4Extra from compounding: $2,148 - $1,800 = $348
Result:
Compounding earns $348 more than simple interest over 3 years
High APY Yield Farming
Problem:
$25,000 in a yield farm at 100% APR, daily compounding, no contributions, for 1 year.
Solution Steps:
- 1APY = (1 + 1.00/365)^365 - 1 = 171.46%
- 2Final amount: $25,000 Ć (1 + 1.00/365)^365 = $67,865
- 3Interest earned: $67,865 - $25,000 = $42,865
- 4Effective annual return: 171.46% (not 100%)
Result:
$67,865 final value, $42,865 interest (171.46% effective APY)
Tips & Best Practices
- āAlways compare yields using APY rather than APR for accurate comparisons.
- āReinvest staking and lending rewards regularly to maximize compounding benefits.
- āConsider the impact of gas fees on small, frequent compounding transactions.
- āDiversify across multiple protocols to reduce smart contract risk.
- āMonitor rate changes as DeFi yields can fluctuate significantly over time.
- āFactor in taxes on compounded interest as you may owe taxes on each compound event.
Frequently Asked Questions
Sources & References
Last updated: 2026-06-06
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
Formula Source: Standard Mathematical References
by Various