Compound interest and growth
Compound growth of a starting amount at a fixed rate, with optional regular contributions, plus the doubling time and the effective annual rate.
- Compound interest
- Effective annual rate
- Doubling time
- Regular contributions
After 10 years
Final amount1,647.01
Total paid in1,000starting 1,000 plus 0 contributed
Interest earned647.01
Growth multiple1.647×
From the starting amount alone1,647.01
Rates
Nominal annual rate5%
Rate per period0.416667%12 periods per year
Effective annual rate5.11619%what the nominal rate actually compounds to over a year
Doubling time13.892 yearsthe "rule of 72" estimates 14.4
What this ignores
InflationNot appliedthese are nominal amounts, not purchasing power
Tax and feesNot applied
Rate changesThe rate is assumed fixed for the whole term