> > > > > > >
📈
Estimates only. Results assume a fixed interest rate for the full period. Real investments vary year to year. Use this for fixed-rate planning (CDs, bonds, HYSA) or for rough long-term stock-market estimates.

Compound Interest Calculator — Final Amount & APY

See how a single deposit grows with compound interest. Pick how often the interest compounds — daily for crypto/stocks, monthly for HYSAs, quarterly for bonds.

$0.00
per year
Annual Depreciation
Total depreciable amount
Book value end of year 1

Year 1 book value = purchase price minus first year depreciation.

Year 1 book value = purchase price minus first year depreciation.

How compounding frequency matters

A 5% rate compounded daily yields 5.1267% APY; compounded monthly it is 5.116%; annually, 5.0%. The difference is small at low rates, but at 20% or higher, daily compounding can add 0.5-1% extra per year. For practical purposes, monthly is the right default for most savings accounts.

How this calculator works

When straight-line depreciation applies

Straight-line is the most common depreciation method for financial reporting and taxes. Other methods (declining balance, sum-of-years digits) front-load depreciation but are more complex. GAAP and IRS both accept straight-line for most assets.

📈
Estimates only. Results assume a fixed interest rate for the full period. Real investments vary year to year. Use this for fixed-rate planning (CDs, bonds, HYSA) or for rough long-term stock-market estimates.

Compound Interest Calculator — Final Amount & APY

See how a single deposit grows with compound interest. Pick how often the interest compounds — daily for crypto/stocks, monthly for HYSAs, quarterly for bonds.

$0.00
per year
Annual Depreciation
Total depreciable amount
Book value end of year 1

Year 1 book value = purchase price minus first year depreciation.

Year 1 book value = purchase price minus first year depreciation.

How compounding frequency matters

A 5% rate compounded daily yields 5.1267% APY; compounded monthly it is 5.116%; annually, 5.0%. The difference is small at low rates, but at 20% or higher, daily compounding can add 0.5-1% extra per year. For practical purposes, monthly is the right default for most savings accounts.

How this calculator works

When straight-line depreciation applies

Straight-line is the most common depreciation method for financial reporting and taxes. Other methods (declining balance, sum-of-years digits) front-load depreciation but are more complex. GAAP and IRS both accept straight-line for most assets.

>