How to Use Overtime Calculator
The Overtime Calculator makes it easy to work out exactly how much you should be paid.
- Choose Wage Mode — Select Hourly Rate to enter your rate directly, or Monthly Salary to let the Overtime Calculator derive your hourly rate automatically.
- Enter Your Wage — Type your hourly rate or monthly salary. For the monthly mode, adjust work days per month and hours per day if needed.
- Enter Base Salary (optional) — If you want the Overtime Calculator to include your regular pay in the total income figure, enter it here.
- Add Overtime Sessions — For each overtime block, select the type (Weekday, Weekend, or Public Holiday), enter the hours worked, and confirm or adjust the multiplier.
- Read the Results — The Overtime Calculator shows your effective hourly rate, a pay breakdown per session, total overtime pay, and — if a base salary was entered — your total income.
Formula & Theory — Overtime Calculator
The Overtime Calculator uses the standard overtime wage formulas widely adopted in employment law and HR practice.
Hourly Rate from Monthly Salary:
Hourly Rate = Monthly Salary / Work Days per Month / Hours per Day
Overtime Pay per Session:
Overtime Pay = Hours × Hourly Rate × Multiplier
Total Income:
Total Income = Base Salary + Sum of all Overtime Pay
| Variable | Meaning |
|---|---|
| Monthly Salary | Gross monthly fixed pay |
| Work Days per Month | Typically 21.75 (statutory default in many jurisdictions) |
| Hours per Day | Standard daily working hours, typically 8 |
| Multiplier | Overtime rate factor (1.5×, 2×, 3× etc.) |
Default Multipliers
Many labor regulations set minimum overtime multipliers: 1.5× for hours beyond normal weekday limits, 2× for rest days, and 3× for statutory public holidays. The Overtime Calculator pre-fills these defaults while allowing full customization.
Use Cases for Overtime Calculator
The Overtime Calculator is useful for a wide range of employees and HR professionals:
- Salaried Employees — Convert your monthly salary to an hourly figure and instantly see your overtime entitlement with the Overtime Calculator.
- Hourly Workers — Enter your rate directly and log multiple overtime blocks across different day types.
- HR & Payroll Teams — Use the Overtime Calculator to quickly verify overtime calculations before processing payroll.
- Shift Workers & Nurses — Track complex schedules that mix weekday, weekend, and holiday shifts in a single Overtime Calculator session.
- Freelancers & Contractors — Calculate additional billing for work performed outside agreed hours.
- Employers — Estimate labor cost impact before approving overtime requests using the Overtime Calculator.
Whether you are checking your payslip or planning a project schedule, the Overtime Calculator gives you a transparent, detailed breakdown of every overtime dollar earned.