Whether you are estimating on the spot or checking a result somebody else gave you, the 12 hour shift calculator is the quickest way to get from hourly wage, number of regular hours and overtime hourly wage to average wage per hour, pay per month and pay per week.
What Is the 12 Hour Shift Calculator?
The 12 hour shift calculator takes hourly wage, number of regular hours and overtime hourly wage and turns them into average wage per hour, pay per month and pay per week.
It is the kind of calculation you would otherwise do on the back of an envelope: mechanical, repeatable and easy to get subtly wrong without noticing.
How the 12 Hour Shift Figure Is Built
Each result is calculated from the ones before it, so the working is fully visible. That matters when the answer is going to be quoted to somebody else and you need to be able to explain where it came from.
The figures are exactly as good as the assumptions underneath them. Check the rates, the periods and the tax treatment before you rely on the result.
Reading the Result Sensibly
A small change in an input can move the result by much more than you would expect, particularly where the calculation divides by one of the figures you supplied. That is worth understanding before you rely on a figure.
For anything that will be committed to, write the inputs down beside the result. A number you can reproduce is worth far more than one you cannot explain.
A Worked Example
Working through an example, with hourly wage set to 10, number of regular hours set to 5, overtime hourly wage set to 2, the calculator returns pay per day of 64, and pay per week of 320, and pay per month of 1,408. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out average wage per hour?
Enter hourly wage, number of regular hours and overtime hourly wage. The calculator then works through the relationship and reports average wage per hour, pay per month and pay per week.
What does the 12 hour shift actually calculate?
It takes hourly wage, number of regular hours and overtime hourly wage and converts them into average wage per hour, pay per month and pay per week using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter hourly wage?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Is the answer exact?
It is as exact as the formula and the inputs allow. The method itself is the standard one for this problem, so the only sources of error are the figures you enter and the precision you ask for.
Why does a small change in one value move the answer so much?
That happens when an output depends on a ratio, because dividing by a small number magnifies any change in it. Check the units first, then check whether the value you entered is in the range the relationship was designed for.