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$100,000 invested for 10 years at 3%
Exact compound math for the given inputs.
$134,935.35
future value (monthly compounding, no deposits)
Principal$100,000.00
Interest earned$34,935.35
Growth multiple1.35×
Rule of 7224.0 yrs to double
Frequently asked questions
How much will $100,000 be worth in 10 years at 3%?
With monthly compounding it grows to $134,935.35 — that is $34,935.35 of interest earned on $100,000.00.
What if compounding is annual instead of monthly?
Annual compounding gives $134,391.64 — more frequent compounding always yields slightly more.
How long until it doubles?
The Rule of 72 estimates 24.0 years at 3% (24.00 precisely).
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Change the numbers yourself
Open the interactive compound interest calculator — every field is editable.