Calculate how your savings or investments grow with daily, weekly, monthly or yearly compounding. Multi-currency support, live charts, PDF export and goal tracking — free to start, no sign-up needed.
7 free calculations · then $4.99/yr · cancel anytime
Who it's for
Educators
Demonstrate compound interest in the classroom with real numbers, multiple currencies, and clear period-by-period breakdowns.
Traders & Investors
Model returns across days, weeks, months or years. Switch currencies instantly. See exactly how your money compounds.
Financial Advisors
Show clients the power of compound growth. Clean, professional output — no spreadsheets needed.
Features
Simple and Advanced modes — quick answers or full period-by-period breakdowns
20 currencies with live exchange rates — switch instantly, no page reload
Calculate by day, week, month or year — whatever your period is
Drag sliders or type directly — works perfectly on mobile and desktop
Detailed growth charts showing balance and interest at every period
No account needed to start — just open and calculate
Preset quick-select amounts for fast scenario comparisons
Fully mobile optimised — looks great on any screen size
Pricing
Less than a coffee. Per year.
Pro
$4.99 /year
Secure payment via Stripe · Instant access · Cancel anytime
About
Most compound interest calculators are clunky, ad-riddled, or stuck in 2005. Easy-Compound-Interest.com was built from scratch to be fast, beautiful, and genuinely useful — whether you're teaching a class, advising a client, or working out if your investment stacks up.
At $4.99 a year — just 40 cents a month — it saves you hours of spreadsheet work.