Overtime Calculator: Hours & Pay

This overtime calculator works out your overtime pay for a single shift or a whole week. You enter your regular hourly rate, your standard work hours, your total hours worked, and your overtime multiplier, and it returns your regular pay, overtime pay, and total gross pay. The calculator uses the standard time-and-a-half rule by default, but you can adjust the multiplier to match your situation.

Formula

The overtime pay formula is simple once you separate regular hours from overtime hours:

• Overtime hours = max(Total hours − Standard hours, 0)
• Regular pay = Hourly rate × min(Total hours, Standard hours)
• Overtime pay = Hourly rate × Overtime multiplier × Overtime hours
• Total gross pay = Regular pay + Overtime pay

Where:

• Hourly rate – your base pay per hour, in your local currency (e.g., $, €, £).
• Standard hours – the number of hours you work before overtime kicks in (typically 40 per week, but it can be 8 per day or another value).
• Total hours worked – all hours you actually worked in the period, including overtime.
• Overtime multiplier – the factor applied to your hourly rate for overtime hours. Common values: 1.5 (time-and-a-half), 2.0 (double time), or 1.25 (some holiday rates).

The formula assumes all overtime hours are paid at the same multiplier. If you have different rates for different overtime blocks (e.g., first 2 hours at 1.5×, then 2×), you would need to calculate each block separately.

Worked Example

Using the calculator defaults: hourly rate = $25, standard hours = 40, total hours = 45, multiplier = 1.5.

1. Overtime hours = 45 − 40 = 5 hours
2. Regular pay = $25 × 40 = $1,000
3. Overtime pay = $25 × 1.5 × 5 = $187.50
4. Total gross pay = $1,000 + $187.50 = $1,187.50

The calculator shows exactly that: 5 overtime hours, $1,000 regular pay, $187.50 overtime pay, and $1,187.50 gross pay. Notice that the overtime rate is $37.50 per hour, which is 1.5 times the base rate.

When to Use This Calculator

Use this calculator whenever you need to estimate gross pay for a period that includes overtime. Common situations:

• Checking a pay stub to see if overtime was calculated correctly.
• Budgeting before taking on extra shifts.
• Comparing job offers with different base rates and overtime policies.
• Estimating payroll for a small business or freelance client.

This calculator gives gross pay before deductions. Your net pay (take-home) will be lower after taxes, Social Security/Medicare (in the US), health insurance premiums, retirement contributions, and other withholdings. For a quick net estimate, subtract roughly 20–30% for taxes, but the exact amount depends on your filing status and deductions.

Common Mistakes and Misconceptions

One frequent error is mixing up daily and weekly overtime thresholds. Some states or countries require overtime after 8 hours in a single day, while others use a 40-hour weekly threshold. This calculator uses a single standard-hours value, so decide whether you are calculating daily or weekly overtime before entering numbers.

Another mistake is forgetting that overtime is calculated on the base rate, not on a rate that already includes bonuses or shift differentials. For example, if you earn a $2/hour night shift premium, your overtime rate is 1.5 × base rate, not 1.5 × (base + premium). Some employers do include premiums in the overtime base, but that is not the standard rule.

Also, many people assume that working more than 40 hours always triggers overtime. That is true under the federal Fair Labor Standards Act (FLSA) in the US for non-exempt employees, but exempt salaried employees do not get overtime. In other countries, rules differ – some have no overtime requirement, while others have strict caps. Always check your local labor law.

How to Choose the Right Multiplier

The multiplier is the most important variable after your hourly rate. Here are typical values:

• 1.5× (time-and-a-half) – the most common overtime rate, used for weekdays over 40 hours in the US, and for many weekend hours.
• 2× (double time) – often used for holidays, Sundays, or very long shifts (e.g., over 12 hours in a day).
• 1.25× (time-and-a-quarter) – sometimes used for evening or night shifts in certain industries.
• 1.0× (straight time) – not really overtime, but you might use this if you are just calculating total pay for extra hours at your normal rate.

If you are not sure what multiplier applies, check your employment contract, employee handbook, or ask HR. Using the wrong multiplier can over- or under-estimate your pay by a significant amount. For example, a $20/hour worker with 10 overtime hours would earn $300 at 1.5× but $400 at 2× – a $100 difference.

Limitations of the Formula

This calculator is a straightforward model, but real payroll can be more complex. Some limitations to keep in mind:

• Blended overtime rates – if you work at two different base rates in the same week, some jurisdictions require a weighted average rate for overtime. This calculator uses a single rate.
• Bonuses and commissions – in the US, non-discretionary bonuses must be included in the regular rate for overtime calculation, which can change the effective multiplier.
• Rounding – employers may round time to the nearest 15 minutes or use other rounding rules, which can slightly alter total hours.
• Daily vs. weekly – as mentioned, some places have both daily and weekly overtime, which can overlap. This calculator only handles one threshold.
• Exempt vs. non-exempt – salaried employees classified as exempt do not receive overtime, regardless of hours worked.

For precise payroll, always refer to your employer’s policies and local labor laws. This calculator is a planning tool, not a legal document.

Alternatives to Overtime Pay

Not all extra work results in overtime pay. Some employers offer compensatory time (“comp time�) instead – one hour off for each overtime hour worked, or sometimes 1.5 hours off. This is common in the public sector. Comp time is not the same as overtime pay, and it may have restrictions on when you can use it.

Another alternative is flexible scheduling, where you work longer days but get shorter days elsewhere in the week, avoiding overtime entirely. Some employees prefer this for work-life balance, even if it means no overtime premium. When comparing offers, consider the total value: a lower base rate with guaranteed overtime might exceed a higher base rate with no overtime.

Frequently Asked Questions

Is overtime calculated on gross or net pay?

Overtime is calculated on your gross pay – specifically, your base hourly rate. Taxes and other deductions are taken out after the gross amount is computed. So if your base rate is $20 and you work overtime at 1.5×, your overtime hourly rate is $30 gross, and then taxes are withheld from that.

What is the standard overtime rate in the US?

Under the federal Fair Labor Standards Act (FLSA), non-exempt employees must receive at least 1.5 times their regular rate for hours worked over 40 in a workweek. Some states have additional daily overtime rules (e.g., after 8 hours in a day) that are more generous. This calculator uses 1.5× as the default, but you can change it.

How do I calculate overtime if I work different hourly rates?

If you work at two different base rates in the same week, you typically need to calculate a weighted average rate for overtime. For example, if you worked 20 hours at $18 and 20 hours at $22, your regular earnings are (20×$18) + (20×$22) = $800. Your weighted average rate is $800 ÷ 40 = $20/hour. Overtime would then be 1.5 × $20 = $30/hour for any hours over 40. Some states have specific rules, so check local law.

Does overtime apply to salaried employees?

It depends on whether the employee is classified as exempt or non-exempt under the FLSA. Exempt salaried employees (typically executive, administrative, or professional roles earning above a salary threshold) do not receive overtime. Non-exempt salaried employees, who earn a salary but are not exempt, must receive overtime for hours over 40. The salary threshold changes periodically – check the Department of Labor for the current amount.

What is double time?

Double time is an overtime rate of 2× your normal hourly pay. It is less common than time-and-a-half and is usually reserved for holidays, Sundays, or extremely long shifts. Some collective bargaining agreements specify double time for certain conditions. This calculator lets you set the multiplier to 2.0 for such cases.

Can I use this calculator for monthly salary?

No, this calculator is designed for hourly workers. If you are salaried and want to estimate overtime, first convert your monthly salary to an hourly rate by dividing by the number of working hours in a month (typically around 173.33 hours for a 40-hour week). Then use that rate in this calculator. However, note that exempt salaried employees usually do not get overtime.

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in rate | Hourly rate | $ | 25 | 0
in std | Standard hours | h | 40 | 0
in total | Total hours worked | h | 45 | 0
in mult | Overtime multiplier | x | 1.5 | 1
out ot_hours | Overtime hours | h | max(total - std, 0) | 2
out reg_pay | Regular pay | $ | rate * min(total, std) | 2
out ot_pay | Overtime pay | $ | rate * mult * max(total - std, 0) | 2
out gross | Total gross pay | $ | reg_pay + ot_pay | 2