Free Overtime Rate Adjustment Calculator (FLSA, CA)

Page last updated 25 Oct 2026

How to use the overtime rate adjustment calculator

On the Federal tab, enter your hourly rate and hours worked for the week. Add another pay rate if you worked at more than one rate.
Add any non-discretionary bonus or shift differential, which goes into the regular rate.
Enter a new base rate in the optional box to compare the overtime rate and weekly pay before and after a raise.
Use the Salary, Biweekly or California tab if your pay is a salary, your schedule is two weeks, or you work in California.

How is the overtime rate calculated?

The regular rate is all pay for the workweek that counts (wages, non-discretionary bonuses and shift differentials) divided by all hours worked. Hours over 40 in the workweek earn an extra half of that rate. With several pay rates the rate is the weighted average, a fluctuating-workweek salary uses salary divided by hours, and the California tab applies daily overtime after 8 hours and double time after 12.

For example, $22.50 an hour is an overtime rate of $33.75. A 45-hour week pays 40 × $22.50 = $900.00 plus 5 × $33.75, $1,068.75 in all, and a 50-hour week pays $1,237.50. Thirty hours at $20 and twenty at $30 give a regular rate of 24.00 and $1,320.00 for the week. The rates are made up; yours come from what you type.

Who should use the overtime rate adjustment calculator

Hourly workers whose pay includes bonuses, differentials or more than one rate
Payroll staff checking that the regular rate was built correctly
Non-exempt salaried employees who want to know their overtime rate
California workers checking daily overtime and double time

Who should not use this

Anyone who only needs time and a half on one flat wage; the simpler overtime calculator does that
Exempt employees who meet the salary and duties tests and are not owed overtime
Police, fire and some healthcare schedules with their own rules; see the 8 and 80 page for hospitals

Limitations

Federal rules are applied per workweek; state and union rules are modelled only where a tab says so.
California is covered for daily overtime, double time, the seventh day and the 12-hour healthcare schedule, not every exemption.
Whether a bonus is discretionary or not is your judgement; the calculator takes your word.
It is not legal advice.
Nothing is uploaded or stored on a server. Clearing your browser data also removes the saved profile.

What makes this different from a basic overtime calculator

A basic overtime calculator multiplies one hourly rate by 1.5. This one builds the regular rate the way the law requires, so the overtime rate is right when pay is not a single flat wage. It handles:

Regular rate includes non-discretionary bonuses and shift differentials.
Several pay rates in one week, weighted correctly.
California daily overtime, double time, seventh day and healthcare 12-hour schedules.
Salary, monthly salary and fluctuating workweek.
Before-and-after view when your base rate changes.

The overtime formula

The overtime rate is built on the regular rate, which is total pay for the week divided by total hours, not simply the hourly wage. The two formulas are:

Formula regular rate = total pay for the week ÷ total hours; overtime pay = regular rate × 1.5 × hours over 40

$22.50 for 45 hours: overtime rate $33.75, weekly pay $1,068.75.

Why overtime is counted per workweek

A workweek is a fixed, recurring 168-hour period. Hours are never averaged across weeks, and a biweekly pay schedule does not change that.

California differences

California adds daily overtime and double time. Each hour is counted once at the highest rate that applies. The seventh-day rule applies only when you work all seven days of the workweek; the first 8 hours that day are paid at 1.5x.

Sources and review

Reviewed on 25 Oct 2026 against the published sources below. Rules and prices change, so check the current position before you rely on a figure.

Common questions

How do I calculate my OT rate?

Overtime rate = regular rate × 1.5. The regular rate is all pay for the week (wages, non-discretionary bonuses, shift differentials) divided by all hours worked. For a plain hourly worker it is just the hourly rate.

How much is overtime for $22.50 an hour weekly?

The overtime rate is $22.50 × 1.5 = $33.75 an hour. For a 45-hour week: 40 × $22.50 = $900.00 plus 5 × $33.75 = $168.75, total $1,068.75. A 50-hour week pays $1,237.50.

How to calculate the overtime formula?

Weekly pay = (regular rate × hours up to 40) + (regular rate × 1.5 × hours over 40). Or equivalently: regular rate × total hours + 0.5 × regular rate × overtime hours.

How do you calculate overtime with two different rates?

Use the weighted-average regular rate: total straight-time pay ÷ total hours. Example: 30 hours at $20 and 20 hours at $30 is $1,200.00 ÷ 50 = $24.0000. The 10 overtime hours earn an extra half of that: $120.00, for a total of $1,320.00. Use the “add another pay rate” button above.

How do I calculate overtime for monthly salary employees?

Convert to a weekly figure (monthly × 12 ÷ 52), divide by the hours the salary is meant to cover to get the hourly rate, then pay 1.5x for hours over 40. A non-exempt employee on $800.00 a week for 40 hours has a $20.00 rate, so 48 hours pays $1,040.00. Exempt employees who meet the salary and duties tests get no overtime.

What is the fluctuating workweek method?

Where there is a clear agreement that a fixed salary covers all hours worked, the regular rate is salary ÷ hours worked and only the extra half-time is owed for overtime (29 CFR 778.114). $600 for 50 hours: rate $12.00, plus $60.00 = $660.00.

Do bonuses change my overtime rate?

Yes, non-discretionary bonuses (production, attendance, retention promised in advance) must be included in the regular rate. A $50 bonus in a 50-hour week at $10 an hour moves the regular rate to $11.00, so overtime pay rises by $5.00.

How does overtime work in California?

Daily overtime applies after 8 hours (1.5x) and double time after 12. On the seventh straight day of a workweek, the first 8 hours are 1.5x and beyond that 2x. A 13-hour day at $25 pays $400.00: 8 hours regular, 4 at 1.5x, 1 at 2x. A flat-sum bonus is divided by the non-overtime hours to get the regular rate.

How is overtime calculated biweekly?

Federal overtime is per workweek, not per pay period. Two weeks of 38 and 45 hours gives 5 overtime hours, not 3. Use the Biweekly tab above.

What is a daily overtime calculator?

Some states (for example California, Alaska, Nevada and Colorado) have some form of daily overtime. Use the California tab to see hours split into regular, overtime and double time.

What is the overtime rate adjustment after a raise?

When the base rate changes, the overtime rate changes with it. Enter a new base rate in the optional box on the Federal tab to compare the overtime rate and weekly pay before and after.

What is the FLSA overtime rate adjustment?

Under the Fair Labor Standards Act a non-exempt employee is owed at least 1.5 times the regular rate for hours over 40 in a workweek. Anything that is part of pay for the week, other than excluded items such as true gifts or expense reimbursements, has to be in the regular rate.

Is there an overtime rate adjustment calculator for Excel?

Yes: =(Pay+Bonus+Differential)/Hours for the regular rate, then =Rate*1.5*MAX(0,Hours-40)+Rate*MIN(Hours,40) for pay. The calculator above does it for several rates at once.

Guides that explain the rules

Related tools

Results are estimates, not legal, tax, payroll or financial advice. They follow the rules and rates named under Sources, leave out anything the page does not mention (such as other income, credits, local rules or your employer’s own policy), and can differ from a payroll run, a tax return or an agency’s decision. See the disclaimer. Found a mistake? Report an error in a calculation.