npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

@toolsnap/compound-interest-calc

v1.0.0

Published

Free online Compound Interest Calculator. Calculate compound interest with different compounding frequencies, contributions, and inflation adjustment.

Downloads

83

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

lwhittmylwhittmy

Keywords

compound interestcalculatorinvestmentsavingsfinanceinterest rateAPYgrowth

Readme

Compound Interest Calculator

Free online Compound Interest Calculator — calculate compound interest with different compounding frequencies, monthly contributions, and year-by-year breakdowns.

Installation

npm install @toolsnap/compound-interest-calculator

Usage

const { compoundInterest, withMonthlyContribution, effectiveAnnualRate } = require('@toolsnap/compound-interest-calculator');

// Basic compound interest: $10,000 at 5% for 10 years, compounded monthly
const result = compoundInterest(10000, 0.05, 10, 12);
console.log(result);
// { amount: 16470.09, interest: 6470.09 }

// With monthly contributions: $5,000 initial + $200/month at 7% for 20 years
const savings = withMonthlyContribution(5000, 200, 0.07, 20);
console.log(savings);
// { totalDeposited: 53000, interestEarned: 74292.34, finalAmount: 127292.34 }

// Effective Annual Rate
const ear = effectiveAnnualRate(0.05, 365);
console.log(ear); // 0.05127...

API

compoundInterest(principal, rate, time, frequency)

Calculate compound interest on a principal amount.

withMonthlyContribution(principal, monthly, rate, years)

Calculate growth with regular monthly contributions added.

effectiveAnnualRate(nominalRate, frequency)

Convert nominal rate to effective annual rate.

amortizationTable(principal, rate, years, frequency)

Get year-by-year breakdown of balance and interest.

Related Tools

License

MIT