Home › Calculators › Compound interest calculator › 10000-15y-8
$10,000 invested for 15 years at 8%
Exact compound math for the given inputs.
$33,069.21
future value (monthly compounding, no deposits)
Principal$10,000.00
Interest earned$23,069.21
Growth multiple3.31×
Rule of 729.0 yrs to double
Frequently asked questions
How much will $10,000 be worth in 15 years at 8%?
With monthly compounding it grows to $33,069.21 — that is $23,069.21 of interest earned on $10,000.00.
What if compounding is annual instead of monthly?
Annual compounding gives $31,721.69 — more frequent compounding always yields slightly more.
How long until it doubles?
The Rule of 72 estimates 9.0 years at 8% (9.00 precisely).
Try nearby scenarios
Change the numbers yourself
Open the interactive compound interest calculator — every field is editable.