Salary Calculator

A lightweight JavaScript library for salary conversions, tax estimates, and overtime calculations. Supports annual, monthly, biweekly, weekly, and hourly conversions with 2024 US federal tax bracket estimates.

Try it online: RiseTop Salary Calculator — a free, no-signup tool to calculate your salary in different pay periods with tax estimates.

Installation

npm install @toolsnap/salary-calculator

Usage

Quick Salary Breakdown

const { salaryBreakdown } = require('@toolsnap/salary-calculator');

// Get a full breakdown from annual salary
const breakdown = salaryBreakdown(75000, 'annual');
console.log(breakdown);
// {
//   annual: 75000,
//   monthly: 6250,
//   biweekly: 2884.62,
//   weekly: 1442.31,
//   hourly: 36.06,
//   daily: 288.46,
//   federalTax: 12020.5,
//   socialSecurity: 4650,
//   medicare: 1087.5,
//   totalDeductions: 17758,
//   netAnnual: 57242,
//   netMonthly: 4770.17,
//   effectiveRate: 23.68
// }

// Or from hourly rate
const fromHourly = salaryBreakdown(35, 'hourly');

Unit Conversions

const {
  annualToMonthly,
  annualToHourly,
  hourlyToAnnual,
  monthlyToHourly
} = require('@toolsnap/salary-calculator');

annualToMonthly(90000);   // 7500
annualToHourly(90000);    // 43.27
hourlyToAnnual(45);       // 93600
monthlyToHourly(6000);    // 34.62

Overtime Calculation

const { calculateOvertimeDetailed } = require('@toolsnap/salary-calculator');

const overtime = calculateOvertimeDetailed(25, 50);
console.log(overtime);
// {
//   regularPay: 1000,
//   overtimePay: 375,
//   totalPay: 1375,
//   overtimeHours: 10
// }

Tax Estimation

const { estimateFederalTax, calculateTakeHome } = require('@toolsnap/salary-calculator');

// Federal tax with bracket breakdown
const tax = estimateFederalTax(100000);
console.log(tax.effectiveRate);  // 14.28
console.log(tax.marginalRate);   // 22

// Full take-home calculation (federal + FICA)
const takeHome = calculateTakeHome(100000, 'single');
console.log(takeHome.netMonthly);  // 6338.46

API Reference

Conversion Functions

| Function | Description | |---|---| | annualToMonthly(annual) | Annual → Monthly (÷12) | | annualToBiweekly(annual) | Annual → Biweekly (÷26) | | annualToWeekly(annual) | Annual → Weekly (÷52) | | annualToHourly(annual, [hoursPerWeek=40]) | Annual → Hourly | | hourlyToAnnual(hourly, [hoursPerWeek=40]) | Hourly → Annual | | hourlyToMonthly(hourly, [hoursPerWeek=40]) | Hourly → Monthly | | monthlyToAnnual(monthly) | Monthly → Annual | | monthlyToHourly(monthly, [hoursPerWeek=40]) | Monthly → Hourly |

Calculation Functions

| Function | Description | |---|---| | salaryBreakdown(value, unit, [hoursPerWeek]) | Full salary breakdown with tax estimates | | calculateOvertimePay(hourlyRate, totalHours) | Weekly pay with 1.5x overtime | | calculateOvertimeDetailed(hourlyRate, totalHours, [multiplier]) | Detailed overtime breakdown | | estimateFederalTax(income, [filingStatus]) | Federal tax with bracket details | | calculateTakeHome(income, [filingStatus]) | Net pay after federal tax + FICA |

Related Tools

• RiseTop Salary Calculator — Free online salary calculator with real-time results
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• RiseTop All Tools — 1000+ free online tools for developers and professionals

License

MIT