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$1,000 invested for 30 years at 2%
Exact compound math for the given inputs.
$1,821.21
future value (monthly compounding, no deposits)
Principal$1,000.00
Interest earned$821.21
Growth multiple1.82×
Rule of 7236.0 yrs to double
Frequently asked questions
How much will $1,000 be worth in 30 years at 2%?
With monthly compounding it grows to $1,821.21 — that is $821.21 of interest earned on $1,000.00.
What if compounding is annual instead of monthly?
Annual compounding gives $1,811.36 — more frequent compounding always yields slightly more.
How long until it doubles?
The Rule of 72 estimates 36.0 years at 2% (36.00 precisely).
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Change the numbers yourself
Open the interactive compound interest calculator — every field is editable.