Simple Interest Calculator — Pro
Real-time results • Export, Save, Print • Responsive UI • Beautiful charts & history
Version
1.1
Help
Principal
$
Enter the initial amount you invest or borrow.
Annual Rate (%)
%
Tip: use decimals for fractional rates.
Time Period
Years
Months
Days
Switch units to calculate using months or days (converted for simple interest).
Currency
USD ($)
EUR (€)
GBP (£)
INR (₹)
PKR (₨)
JPY (¥)
Quick Presets
Starter $1,000
Growth $5,000
Business $20,000
Clear History
Live Preview
—
Interest
—
Principal
—
Calculate
Reset
Save
Copy
Export CSV
Print
Pro tip: fields auto-calc while typing. Use
Enter
to run calculate.
Result Summary
Principal
—
Interest
—
Total Amount
—
Undo Last
Export TXT
Share (Link)
Calculation History
Saved locally in your browser
#
Principal
Rate
Time
Interest
Total
Actions
Built with ❤ — Bootstrap • Chart.js • SweetAlert2