Compound Interest Calculations
Pre-calculated results for the most common compound interest scenarios. Click any result to see the full year-by-year breakdown.
Lump Sum Investments
$10,000 at 7% Interest for 10 Years
monthly compounding · 10 years
$20,096.61
+$10,096.61 interest
$10,000 at 7% Interest for 20 Years
monthly compounding · 20 years
$40,387.39
+$30,387.39 interest
$10,000 at 7% Interest for 30 Years
monthly compounding · 30 years
$81,164.97
+$71,164.97 interest
$10,000 at 10% Interest for 10 Years
monthly compounding · 10 years
$27,070.41
+$17,070.41 interest
$10,000 at 5% Interest for 10 Years
monthly compounding · 10 years
$16,470.09
+$6,470.09 interest
$1,000 at 7% Interest for 10 Years
monthly compounding · 10 years
$2,009.66
+$1,009.66 interest
$5,000 at 7% Interest for 10 Years
monthly compounding · 10 years
$10,048.31
+$5,048.31 interest
$50,000 at 7% Interest for 10 Years
monthly compounding · 10 years
$100,483.07
+$50,483.07 interest
$100,000 at 7% Interest for 10 Years
monthly compounding · 10 years
$200,966.14
+$100,966.14 interest
$100,000 at 5% Interest for 20 Years
monthly compounding · 20 years
$271,264.03
+$171,264.03 interest
$10,000 at 4% Interest for 5 Years
monthly compounding · 5 years
$12,209.97
+$2,209.97 interest
$10,000 at 12% Interest for 10 Years
monthly compounding · 10 years
$33,003.87
+$23,003.87 interest
$1 Million at 4% Interest — Retirement Income
monthly compounding · 30 years
$3,313,498.01
+$2,313,498.01 interest
How Long for $10,000 to Double at 7% Interest?
monthly compounding · 11 years
$21,549.40
+$11,549.40 interest
Monthly Contribution Scenarios
$1,000 Per Month at 7% Interest for 10 Years
$1,000.00/mo · 10 years at 7%
$174,094.47
+$54,094.47 interest
$500 Per Month at 7% Interest for 20 Years
$500.00/mo · 20 years at 7%
$261,982.70
+$141,982.70 interest
$1,000 Per Month at 10% Interest for 30 Years
$1,000.00/mo · 30 years at 10%
$2,279,325.32
+$1,919,325.32 interest
$100 Per Month for 30 Years at 7% Interest
$100.00/mo · 30 years at 7%
$122,708.75
+$86,708.75 interest
$200 Per Month for 20 Years at 7% Interest
$200.00/mo · 20 years at 7%
$104,793.08
+$56,793.08 interest
Special Calculators
$1 Million at 4% Interest — Retirement Income
How much interest does $1 million earn at 4%? See annual income potential, growth over 30 years, and retirement planning insights.
Rule of 72 Calculator — How Fast Does Your Money Double?
Use the Rule of 72 to quickly estimate how long it takes to double your money at any interest rate. Includes comparison table and examples.
How Long for $10,000 to Double at 7% Interest?
Find out exactly how long it takes $10,000 to double at 7% compound interest. Includes Rule of 72 explanation and year-by-year growth.