CD (Certificate of Deposit) Calculator

CD (Certificate of Deposit) is evaluated from Deposit Amount, Annual Interest Rate and CD Term. The calculation reports Interest Earned, Total Value at Maturity and APY.

Results

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About the CD (Certificate of Deposit) Calculator

CD (Certificate of Deposit) is treated here as a quantitative relation between Deposit Amount, Annual Interest Rate, CD Term and Compounding Frequency and Interest Earned, Total Value at Maturity and APY.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
A = P x (1 + r/n)^(n x t)
- A = total value at maturity
- P = principal
- r = annual rate (decimal)
- n = compounding periods per year (365 daily, 12 monthly, etc.)
- t = term in years
Interest Earned = A - P
APY = (1 + r/n)^n - 1

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

A = P x (1 + r/n)^(n x t)
- A = total value at maturity
- P = principal
- r = annual rate (decimal)
- n = compounding periods per year (365 daily, 12 monthly, etc.)
- t = term in years
Interest Earned = A - P
APY = (1 + r/n)^n - 1

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: 1-Year CD — Online Bank

Inputs

principal: 25000 annual_rate: 5.15 term_months: 12 compounding: 365
Interest Earned: $1,321.13. Total Value at Maturity: $26,321.13. APY: 5.2845%

With Deposit Amount = 25,000, Annual Interest Rate = 5.15, CD Term = 12 and Compounding Frequency = 365 as the stated inputs, the result is Interest Earned = $1,321.13, Total Value at Maturity = $26,321.13 and APY = 5.2845%. Each value corresponds to the declared output fields.

Example 2: 6-Month Short-Term CD

Inputs

principal: 50000 annual_rate: 5.3 term_months: 6 compounding: 12
Interest Earned: $1,339.72. Total Value at Maturity: $51,339.72. APY: 5.4307%

With Deposit Amount = 50,000, Annual Interest Rate = 5.3, CD Term = 6 and Compounding Frequency = 12 as the stated inputs, the result is Interest Earned = $1,339.72, Total Value at Maturity = $51,339.72 and APY = 5.4307%. Each value corresponds to the declared output fields.

Example 3: 5-Year Jumbo CD

Inputs

principal: 100000 annual_rate: 4.75 term_months: 60 compounding: 12
Interest Earned: $26,748.06. Total Value at Maturity: $126,748.06. APY: 4.8548%

With Deposit Amount = 100,000, Annual Interest Rate = 4.75, CD Term = 60 and Compounding Frequency = 12 as the stated inputs, the result is Interest Earned = $26,748.06, Total Value at Maturity = $126,748.06 and APY = 4.8548%. Each value corresponds to the declared output fields.

Example 4: CD Ladder — 12-Month Rung

Inputs

principal: 10000 annual_rate: 5 term_months: 12 compounding: 12
Interest Earned: $511.62. Total Value at Maturity: $10,511.62. APY: 5.1162%

With Deposit Amount = 10,000, Annual Interest Rate = 5, CD Term = 12 and Compounding Frequency = 12 as the stated inputs, the result is Interest Earned = $511.62, Total Value at Maturity = $10,511.62 and APY = 5.1162%. Each value corresponds to the declared output fields.

Common Use Cases

  • Calculate how much a CD will earn at maturity
  • Compare CD options from different banks on APY
  • Find the best CD term for your savings goal