The Next Dollar
Money Calculators
Free, working tools — no signup, no paywall. Each one focuses on a single question and shows its assumptions plainly.
Available Tools
investingInteractive
Investment Growth Calculator
Model how small monthly additions compound over 10 to 30 years with realistic, conservative returns. See the exact split between your deposits and compound growth.
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planningInteractive
Monthly Investment Needed Calculator
Work backward from a target amount to see the constant monthly contribution needed, given your current balance, timeline, and an assumed rate of return.
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retirementInteractive
401(k) Maxed — What Next?
An educational tool for after you've captured your employer match or maxed a workplace plan — surfaces categories people commonly research next (HSA, IRA, taxable brokerage, and more), without prescribing one order.
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Need more than a calculator?