Home › Calculators › Compound interest calculator › 1000-20y-7
$1,000 invested for 20 years at 7%
Exact compound math for the given inputs.
$4,038.74
future value (monthly compounding, no deposits)
Principal$1,000.00
Interest earned$3,038.74
Growth multiple4.04×
Rule of 7210.3 yrs to double
Frequently asked questions
How much will $1,000 be worth in 20 years at 7%?
With monthly compounding it grows to $4,038.74 — that is $3,038.74 of interest earned on $1,000.00.
What if compounding is annual instead of monthly?
Annual compounding gives $3,869.68 — more frequent compounding always yields slightly more.
How long until it doubles?
The Rule of 72 estimates 10.3 years at 7% (10.29 precisely).
Try nearby scenarios
Change the numbers yourself
Open the interactive compound interest calculator — every field is editable.