Certificate of Deposit (CD) Calculator

Use this calculator to estimate the maturity value and interest earned from a certificate of deposit.

What this calculator does

The CD calculator estimates how much a fixed deposit may be worth at the end of its term.

It uses:

• initial deposit
• annual percentage yield
• CD term
• compounding frequency

CD Formula

A = P x (1 + r/n)^(nt)

Where:

• A = maturity value
• P = initial deposit
• r = annual rate
• n = compounding periods per year
• t = term in years

Example calculation

If:

• Initial deposit = 10,000
• APY = 4%
• Term = 2 years
• Compounding = monthly

Then:

• Maturity value = about 10,832
• Interest earned = about 832
• Monthly interest equivalent = about 35

The CD matures at about 10,832.

What is a CD?

A certificate of deposit is a time deposit that pays interest for locking money away for a set term. CDs often have early withdrawal penalties, so the term matters.

Why CD returns matter

• show the value of locking cash for a term
• compare CDs with savings accounts
• estimate interest before maturity
• support low-risk cash planning

When to use this calculator

• comparing CD terms and rates
• estimating maturity value
• planning cash needed on a future date
• checking the effect of compounding frequency

Common mistakes

• ignoring early withdrawal penalties
• comparing nominal rates instead of APY
• choosing a term longer than the cash need allows
• forgetting taxes can reduce net interest

CD vs high-yield savings

A CD usually locks money for a fixed term and rate. High-yield savings usually keeps money more accessible but may have a variable rate.

FAQs

What is a CD?

A CD is a time deposit that earns interest over a fixed term.

How do you calculate CD maturity value?

Multiply the deposit by one plus the periodic rate raised to the number of compounding periods.

What is a good CD rate?

A good CD rate is competitive for the term and high enough to justify reduced access to the cash.

What is the difference between a CD and a savings account?

A CD has a fixed term. A savings account is usually more liquid and may have a variable rate.