What Is the Annuity Calculator?
An annuity calculator values a stream of equal periodic payments.
How Does the Annuity Calculator Work?
It compounds each payment forward for future value or discounts it back for present value.
Annuity Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Each payment earns interest for the remaining periods; the sum of those values gives the future value.
How to Use the Annuity Calculator
- Enter the payment, rate, term and payment frequency.
Step-by-Step Example Calculation
$1,000/year for 10 years at 6%
Input Values:
payment:1000
annualRate:6
years:10
paymentsPerYear:1
annuityType:ordinary
Worked Steps: The stream grows to about $13,181.
Understanding Your Result
The result shows both the future and present value of the stream.
Factors That Affect the Result
- Payment size, rate, term and timing determine the value.
When Should You Use This Calculator?
- Use it for pensions, loans, leases and instalment plans.
Assumptions & Limitations
- Assumes level payments and a constant interest rate.
Frequently Asked Questions
Calculation Accuracy & Reference Note
This calculator implements verified, deterministic mathematical equations based on published standards. Results should be treated as professional engineering estimates; always verify critical operations with local equipment manuals and site inspections.