Frequently asked questions
How is this different from a CAGR calculator?
CAGR (Compound Annual Growth Rate) assumes annual compounding. This calculator lets you specify the actual compounding frequency (daily, monthly, quarterly). With annual compounding selected, the result is identical to CAGR.
What is the difference between nominal rate and effective annual rate?
The nominal rate is the stated annual rate before accounting for compounding frequency. The effective annual rate (EAR) includes the compounding effect and represents the true annual return. EAR is always slightly higher than the nominal rate when compounding is more frequent than annual.
Can I use this to find the rate on my loan?
Only for lump-sum loans with no periodic payments. If you borrowed a principal and owe a final balloon amount after a fixed time, enter those as starting and final amounts. For loans with monthly payments (mortgages, car loans), use a loan-specific calculator.
Why does the compounding frequency matter for finding the rate?
The same total growth over the same period implies different nominal rates depending on how often interest compounds. More frequent compounding means each individual crediting is smaller, so the stated nominal rate is lower even though the effective growth is the same.
What if my investment lost money?
This calculator requires the final amount to be greater than the principal to compute a positive rate. For losses, the implied rate would be negative. Consider using an ROI or CAGR calculator that handles negative returns.