EVERY INVESTING DECISION · WITH THE MATH SHOWN

Investment Calculators

Every money decision about growing wealth. Compound interest, DCA, crypto profits, ETF fees, dividend income, portfolio rebalancing — the math behind compound growth.

See compound growth →⚡See live crypto prices + Treasury yields →
Most people start here
Updated May 8, 2026 · SEC · IRS Pub 550

  • Compound Interest Calculator

    Free online compound interest calculator.

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  • Dollar Cost Averaging Calculator

    Free online dollar cost averaging calculator.

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Compound returns do 80% of the lifetime work. $500/mo invested from age 25 at a 7% real return grows to ~$1.2M by 65; starting at 35 cuts that to $568k. ETF expense ratios matter — a 0.03% index fund vs a 0.90% active fund costs you ~18% of your ending balance over 40 years. All historical returns cited from FRED; crypto from CoinGecko weighted exchange averages.

  • Crypto DCA Calculator

    Free online crypto dca calculator.

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  • Crypto Profit/Loss Calculator

    Free online crypto profit/loss calculator.

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  • Crypto Tax Calculator

    Free online crypto tax calculator.

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  • Crypto Tax Liability Calculator

    Free online crypto tax liability calculator.

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  • Bitcoin Halving Impact Calculator

    Free online bitcoin halving impact calculator.

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  • Crypto Mining Profitability Calculator

    Free online crypto mining profitability calculator.

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  • HODL vs DCA Calculator

    Free online hodl vs dca calculator.

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  • Staking Rewards Calculator

    Free online staking rewards calculator.

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  • NFT Profit Calculator

    Free online nft profit calculator.

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  • Crypto Portfolio Tracker

    Free online crypto portfolio tracker.

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  • Compound Interest Calculator

    Free online compound interest calculator.

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  • Dollar Cost Averaging Calculator

    Free online dollar cost averaging calculator.

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  • Portfolio Rebalancing Calculator

    Free online portfolio rebalancing calculator.

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  • Index vs Active Fund Calculator

    Free online index vs active fund calculator.

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  • ETF Fee Impact Calculator

    Free online etf fee impact calculator.

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  • Dividend Income Calculator

    Free online dividend income calculator.

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  • Bond Yield Calculator

    Free online bond yield calculator.

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  • Interest Rate Calculator

    Free online interest rate calculator.

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  • Opportunity Cost Calculator

    Free online opportunity cost calculator.

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  • Stock Profit Calculator

    Free online stock profit calculator.

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  • High-Yield Savings Calculator

    Free online high-yield savings calculator.

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Written and maintained by Jere Salmisto, Founder, CalcFi. Updated May 8, 2026.

Formulas and data sourced from SEC Investor Bulletins, IRS Publication 550 (investment income), and historical return data from FRED + CoinGecko. Methodology at /about/editorial. Published by CalcFi Editorial.