SAVINGS & INVESTING

Interest Calculator

Interest: Constant-return projection with editable compounding, contributions and inflation.

SET UP FOR YOUR COUNTRY Editable estimate

Interest Calculator for United States

USD · 12,345.67US customary measurementsRoad distance: miles

United States planning scenario. Amounts, prices and rates are editable examples. No verified local tax bands, exemptions, benefits or lender rules are applied. Currency amounts are not exchanged.

Switch countries to open a separate scenario. Your edits are kept while this calculator is open; use Save scenario to keep them on this device.

Your details

USD
Example only. Enter the amount or rate applicable to your situation in United States.
USD
Example only. Enter the amount or rate applicable to your situation in United States.
%
Example only. Enter the amount or rate applicable to your situation in United States.
%
Example only. Enter the amount or rate applicable to your situation in United States.
%
Example only. Enter the amount or rate applicable to your situation in United States.

Future balance after entered tax

$47,526.55

Amounts in USD · United States · editable planning estimate

Contributed capital$34,000.00
Growth before tax$13,526.55
Entered tax estimate$0.00
Inflation-adjusted balance$47,526.55
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How this result was calculated

  1. Future value = principal(1+r)^n + deposit[(1+r)^n−1]/r, adjusted for contribution timing.
  2. Country setup: United States. Displayed measurements are converted to the formula's base units internally.

Assumption: Constant-return projection with editable compounding, contributions and inflation. Enter tax as a simplified levy on positive total earnings at the end; actual tax timing, fees and market returns vary. United States planning scenario. Amounts, prices and rates are editable examples. No verified local tax bands, exemptions, benefits or lender rules are applied. Currency amounts are not exchanged.

Calculation version 1.0.0 · Support state: generic

Formula and method

Future value = principal(1+r)^n + deposit[(1+r)^n−1]/r, adjusted for contribution timing.

This calculation uses the values you enter. It runs in your browser and does not request a location or account.

Worked example

1000 growing at 5% annually for 2 years, with no contributions or tax, becomes 1102.50.

Questions people ask

Which method does this tool use?

Future value = principal(1+r)^n + deposit[(1+r)^n−1]/r, adjusted for contribution timing.

What should I check before using the result?

Constant-return projection with editable compounding, contributions and inflation. Enter tax as a simplified levy on positive total earnings at the end; actual tax timing, fees and market returns vary.