Enter the total salary, cost, or quantity you want to convert.
Yearly (365 days)
Monthly (30 days)
Weekly (7 days)
Custom Number of Days
Used to calculate the hourly breakdown.
Please enter a valid Total Amount.
Daily Rate (Calendar):0.00
Hourly Rate:0.00
Working Days Rate (Approx. 5/7):0.00
Total Days Calculated:0
function toggleCustomDays() {
var period = document.getElementById("timePeriod").value;
var customGroup = document.getElementById("customDaysGroup");
if (period === "custom") {
customGroup.style.display = "block";
} else {
customGroup.style.display = "none";
}
}
function calculateRatePerDay() {
// Get Inputs
var totalValue = parseFloat(document.getElementById("totalValue").value);
var periodType = document.getElementById("timePeriod").value;
var customDays = parseFloat(document.getElementById("customDaysInput").value);
var hoursPerDay = parseFloat(document.getElementById("hoursPerDay").value);
var errorDiv = document.getElementById("errorMessage");
var resultDiv = document.getElementById("resultsSection");
// Validate Total Value
if (isNaN(totalValue)) {
errorDiv.style.display = "block";
resultDiv.style.display = "none";
return;
}
errorDiv.style.display = "none";
// Determine number of days
var days = 0;
if (periodType === "year") {
days = 365;
} else if (periodType === "month") {
days = 30.42; // Average days in a month (365/12)
} else if (periodType === "week") {
days = 7;
} else if (periodType === "custom") {
if (isNaN(customDays) || customDays <= 0) {
errorDiv.innerText = "Please enter a valid number of days.";
errorDiv.style.display = "block";
resultDiv.style.display = "none";
return;
}
days = customDays;
}
// Validate Hours
if (isNaN(hoursPerDay) || hoursPerDay <= 0) {
hoursPerDay = 8; // Default fallback
}
// Calculations
var dailyRate = totalValue / days;
var hourlyRate = dailyRate / hoursPerDay;
// Working days calculation (rough estimate: 5/7 of calendar days)
// If the period is 'custom', we assume those are the total relevant days.
// However, usually people want to know: If I earn X per year, what is my rate per working day?
// Standard working days per year is approx 260.
var workingDayRate = 0;
if (periodType === "year") {
workingDayRate = totalValue / 260;
} else if (periodType === "month") {
workingDayRate = totalValue / 21.67; // 260 / 12
} else if (periodType === "week") {
workingDayRate = totalValue / 5;
} else {
// For custom, we just display the same unless the user manually did math,
// but let's just use the raw daily rate as the fallback or apply ratio.
// To be safe and clear, we will just apply the 5/7 ratio.
workingDayRate = dailyRate * (7/5);
}
// Formatting Output
// We use toFixed(2) for currency-like precision, but handle generic numbers too.
document.getElementById("resultDaily").innerText = dailyRate.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("resultHourly").innerText = hourlyRate.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("resultWorking").innerText = workingDayRate.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("resultDaysUsed").innerText = days.toFixed(2) + " days";
// Show Results
resultDiv.style.display = "block";
}
How to Calculate Rate Per Day
Calculating a rate per day (daily rate) is a fundamental arithmetic task used in various contexts, from determining freelance pay to prorating rent or analyzing daily resource consumption. Whether you are dealing with a yearly salary, a monthly subscription, or a project fee, breaking it down into a daily figure helps in comparing costs and understanding value.
The Basic Formula
The core formula to calculate a rate per day is simple division:
Daily Rate = Total Amount ÷ Total Number of Days
Scenarios and Time Periods
Depending on the time period of your total amount, the "Total Number of Days" variable changes:
Yearly to Daily: Divide the annual amount by 365 (or 366 for leap years). For working days (excluding weekends), typically divide by 260.
Monthly to Daily: Divide the monthly amount by 30 or 31 depending on the specific month. For an average across the year, use 30.42 (which is 365 days / 12 months).
Weekly to Daily: Divide the weekly amount by 7 (calendar week) or 5 (standard work week).
Practical Examples
1. Converting Salary to Daily Pay
If you have an annual salary of $52,000 and want to know your gross earnings per calendar day:
Total Value: $52,000
Days: 365
Calculation: 52,000 ÷ 365 = $142.47 per day
2. Prorating Rent
If you move into an apartment on the 15th of September and the monthly rent is $1,200, you need to calculate the rate per day for September to pay the prorated amount.
Total Value: $1,200
Days in September: 30
Daily Rate: 1,200 ÷ 30 = $40.00 per day
Prorated Cost (16 days): $40 × 16 = $640
3. Freelance Project Rates
If you quote $5,000 for a project that will take 20 days to complete, your effective daily rate is:
Total Value: $5,000
Days: 20
Daily Rate: $250.00 per day
Why Use a Rate Calculator?
While the math seems straightforward, inconsistencies often arise when deciding whether to use calendar days (365) or working days (260). This calculator provides immediate breakdowns for both standard calendar divisions and hourly implications, ensuring you have accurate data for invoicing, budgeting, or salary negotiations.