As developers and designers, transitioning to freelance work means figuring out exactly how much to charge to hit our financial goals. I got tired of doing the math manually every time my expenses changed, so I built a clean, client-side Freelance Rate Calculator .

The Approach

I built this using 100% Vanilla JS. Financial goals and business expenses are highly private, so I made sure there are zero server calls. Everything calculates instantly in the browser.

Here is a quick look at the core logic for calculating the required hourly rate:

function calculateHourlyRate ( targetAnnualIncome , annualExpenses , billableHoursPerWeek , weeksWorkedPerYear ) { const totalRequiredRevenue = targetAnnualIncome + annualExpenses ; const totalBillableHours = billableHoursPerWeek * weeksWorkedPerYear ;

const hourlyRate = totalRequiredRevenue / totalBillableHours ;

return { hourlyRate : hourlyRate . toFixed ( 2 ), minimumDailyRate : ( hourlyRate * 8 ).…