Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

401(k) Retirement Calculator

Project the future value of your 401(k) from your current balance, salary, contribution rate, and employer match. Shows how matched contributions and compounding build retirement wealth.

Current 401(k) Balance ($)

Annual Salary ($)

Your Contribution Rate (%)

Employer Match Rate (%)

Years to Retirement (years)

Expected Annual Return (%)

Fill in the required fields to see your result.

Economics

Compound Interest Calculator

Project the future value of a lump-sum investment when interest is reinvested each year using A = P · (1 + r)ᵗ. The simplest compounding model — assumes annual compounding, a constant rate, and no additional contributions or withdrawals.

Principal Amount ($)

Annual Interest Rate (%)

Time Period (years)

Fill in the required fields to see your result.

Key differences

	401(k) Retirement Calculator	Compound Interest Calculator
Category	Personal Finance	Economics
Inputs required	6	3
Result	Retirement Balance ($)	Final Amount ($)
What it does	Project the future value of your 401(k) from your current balance, salary, contribution rate, and employer match. Shows how matched contributions and compounding build retirement wealth.	Project the future value of a lump-sum investment when interest is reinvested each year using A = P · (1 + r)ᵗ. The simplest compounding model — assumes annual compounding, a constant rate, and no additional contributions or withdrawals.