Staking & Compound Interest Calculator
Estimate the future value of a holding that compounds at a given annual yield.
Calculator
For educational and informational purposes only — not financial, investment or tax advice. Results are estimates based on the figures you enter.
Conceptual diagram
What the Compound Interest Calculator does
The Staking & Compound Interest Calculator shows what happens to a principal when a periodic yield is reinvested rather than withdrawn. Enter a starting amount, an annual percentage yield (APY), a compounding frequency, and a time period — the calculator returns the future balance and the total interest earned.
In crypto, this applies most directly to staking rewards, lending yield and savings products. The key insight the calculator makes visible is how reinvesting yield changes the effective growth rate: instead of earning the same dollar amount each year (simple interest), you earn a growing dollar amount because your interest earns interest of its own. This is the compounding effect.
The formula
Where:
P = principal (starting amount)
r = annual rate (as a decimal; 4% = 0.04)
n = compounding periods per year (1=annual, 12=monthly, 365=daily)
t = years
Worked example: staking rewards over 3 years
Illustrative — assumes constant APY, which varies in practice
Principal: 10 ETH (≈$34,000 at $3,400/ETH). APY: 4%. Compounding: monthly (n=12). Period: 3 years.
- Future value: 10 × (1 + 0.04 ÷ 12)^(12 × 3) = 10.127 ETH (≈$34,432)
- Total interest: 0.127 ETH (≈$432 at $3,400)
- Annual compounding (n=1) would produce: 10 × (1.04)^3 = 10.125 ETH
- Difference (monthly vs annual): 0.002 ETH (~$6.80)
Over three years at 4% APY, monthly vs annual compounding adds less than $7 on a $34,000 position. The compounding frequency matters much less than people often assume when the rate is modest and the time horizon is medium.
Where compounding frequency really matters
The more frequent the compounding, the higher the effective annual yield — but the difference shrinks at low rates and widens at high rates. At higher yields (common in early DeFi or high-risk protocols), frequency becomes more significant.
| APY | Annual (n=1) | Monthly (n=12) | Daily (n=365) | Difference (annual vs daily) |
|---|---|---|---|---|
| 4% | $10,400 | $10,407 | $10,408 | +$8 |
| 12% | $11,200 | $11,268 | $11,275 | +$75 |
| 30% | $13,000 | $13,479 | $13,498 | +$498 |
| 100% | $20,000 | $26,130 | $27,145 | +$7,145 |
On $10,000 starting principal. At 4% APY, daily vs annual compounding adds $8 after one year — barely material. At 100% APY (rare, usually high-risk DeFi), the difference is $7,145. This is why APY is a more meaningful figure than APR for DeFi products that compound continuously.
APR vs APY — the key distinction
Most crypto staking products quote APY (annual percentage yield) — the effective annual return accounting for compounding. Some quote APR (annual percentage rate) — the simple, non-compounded rate. These are not the same number.
When comparing staking products, always check whether the quoted rate is APR or APY. If you are comparing a 12% APR product with a 12% APY product, the APY product is higher — it is quoting the already-compounded rate. The calculator works with APY; if you have an APR figure, use the conversion: APY = (1 + APR/n)^n − 1.
Scenario: the staking cost-basis question — claim or compound?
Monthly vs annual claiming: is the gas cost worth it?
10 ETH staked at 4% APY. Period: 3 years.
- Annual compounding (n=1): 10.125 ETH earned
- Monthly compounding (n=12): 10.127 ETH earned
- Difference: 0.002 ETH ≈ $6.80 at $3,400/ETH
If claiming and restaking monthly costs more than $6.80 in total gas fees over three years (approximately $0.19/month), annual compounding is the rational choice for this position and rate. At a higher APY — say 20% — monthly compounding adds approximately 0.39 ETH more than annual, worth ~$1,330 — potentially justifying more frequent claiming even at higher gas costs. The calculator shows the income side; you supply the cost estimate.
The long-horizon effect of compounding
The power of compounding is most visible over long time horizons. Even modest rates produce dramatic outcomes given enough time — an observation that is frequently oversold in marketing, but which the calculator makes precise.
At 10% APY, $10,000 grows to nearly $200,000 in 30 years through reinvestment alone — without adding a single additional dollar. The curvature is slow at the start and accelerates because the base on which interest is earned keeps growing. This is the fundamental economic argument for starting early and maintaining yield reinvestment consistently.
How to use the calculator
- Enter the principal — your starting balance or stake amount.
- Enter the APY — check whether your platform quotes APR or APY and use the correct figure (or convert APR to APY as above).
- Select compounding frequency. Use “annual” if you plan to claim once a year; “monthly” if you claim and restake monthly; “daily” for auto-compounding protocols.
- Set the time period in years.
- Read the future balance and total interest.
- Run a second scenario at half the APY — yields change as protocols adjust rewards. If the outcome is still compelling at half the current rate, the investment thesis is more robust.
Important caveats for crypto staking
- Yields are not fixed. Staking APYs change as more validators join (diluting rewards), as protocol emissions schedules change, and as market conditions shift. A 15% APY today may be 5% in six months.
- Price risk is separate from yield. The calculator operates in units of the staked asset. If you stake 10 ETH at 4% APY and hold for 3 years, you might end up with 10.127 ETH — but if ETH’s dollar price has fallen 50%, your dollar returns are negative. Never conflate token yield with dollar return.
- Smart contract and validator risk. Staking exposes capital to protocol-level risks — smart contract exploits, slashing penalties for validator misbehaviour, or lock-up periods that prevent withdrawal. These risks are not reflected in the yield figure.
- Tax treatment. In many jurisdictions, staking rewards are taxable as income when received, not at withdrawal. The compounding calculation does not account for tax drag on claimed rewards.
Common questions
What is the difference between APY and APR? APR (annual percentage rate) is the simple interest rate before compounding. APY (annual percentage yield) is the effective rate after compounding is applied for one year. For any compounding frequency above zero, APY > APR. Most savings and staking products quote APY because it represents the actual return on your principal over a year.
Does this calculator work for crypto lending? Yes. Enter the lending rate as the APY, select the compounding frequency of the platform, and the calculator shows the projected return. Be aware that lending platforms carry counterparty risk — the lending platform could fail, lose funds or restrict withdrawals.
What compounding frequency should I use for an auto-compounding protocol? Use “daily” (n=365) as the closest approximation for protocols that reinvest rewards continuously. The difference between daily and continuous compounding is minimal (the former converges on e^(r×t) in the limit).
Related reading
- Glossary: Staking, APY and Yield Farming
- Related tools: ROI Calculator, DCA Calculator and Impermanent Loss
For education only — not financial, investment or tax advice. Staking yields vary and are not guaranteed. Price risk is separate from yield.