複利計算シミュレーター vs Compound Interest Pro

毎月積立型で、複利の計算を行うアプリです。 初回投資額、毎月の積立額、年間利回り、期間を入力すると、 それを元に、受取利息の計算を行った結果と、 毎月の明細が表示されます。 ※独自の計算方法を採用していますので、 一般的な公式と若干のズレがある可能性があります。

Compound Interest Professional is a highly precise asset management simulator that lets you calculate savings contributions, withdrawals, goal achievement, required rates, and more. It visualizes your future asset growth with graphs and tables, so you can track principal, interest, and balances for each period. Key Features 1. Future Value Calculator Enter your initial principal, regular contributions, and interest rate to project your total future assets. Add a withdrawal amount to simulate scenarios where you draw down principal while continuing to invest. 2. Contribution/Withdrawal Calculator Figure out how much to save monthly (or annually) to hit your target—or how much you can withdraw each period. 3. Time to Goal Calculator Calculate how many years it will take to reach your goal based on your contribution amount and interest rate. Supports withdrawal scenarios too. 4. Required Rate Calculator Find the annual return rate needed to achieve your target amount. Features - Results are visualized with graphs and tables, so you can easily check details by period. - Supports annual/monthly compounding, as well as accumulation and withdrawals. - High-precision decimal calculations minimize errors. Flexible and Accurate • Professional-grade precision using high-accuracy decimal maths — no rounding errors. • Choose between yearly or monthly compounding and contribution frequencies. • Instant recalculation: change any figure and the results update immediately. • No registration, no ads, no tracking — your data stays on your device. Use Cases - Roth IRA, traditional IRA, and SEP IRA contribution planning - 401(k) and employer match optimization - HSA triple tax advantage projections - 529 plan for education savings (state tax benefits) - Roth conversion ladder for early retirees (FIRE) - High-yield savings account (HYSA) comparison - CD ladder strategies and Treasury planning - Mortgage payoff vs investment decision modeling - DCA into ETFs, index funds, or REITs - 4% rule and safe withdrawal rate scenarios An asset management tool to accurately and simply experience the full power of compound interest. Example Scenarios “If I invest $500 per month for 20 years at 6%, how much will I have?” “How much can I withdraw monthly from $300,000 at 4% for 15 years?” “What rate do I need to reach $1M in 25 years?” “How long will my savings last if I withdraw $2,000 monthly?” "If I max out my Roth IRA ($7,000) annually for 30 years at 7%, how much at age 65?" "If I contribute $1,000/month to my 401(k) with 50% employer match, what's the balance at retirement?" "If I open a 529 plan with $200/month for 18 years, how much for college?" "How long will my HYSA last withdrawing $3,000/month at 4.5% APY?" "What's the safe withdrawal rate from $1M to last 30 years?" 《 About Using the App 》 You may use this service only if you agree to the Terms of Service. The moment you start using the app, a service agreement is established between you and our company. If you're a minor, please use this service only with the consent of your parent or legal guardian.Terms of Use: https://cicalc-74e14.web.app/en/info/#terms Privacy Policy: https://cicalc-74e14.web.app/en/privacy