Estimate weekly and annual gross pay from the base rate, regular hours, eligible differential hours, and premium you enter. This calculator does not model overtime.
NumPad estimates pay from the rate, hours, and differential you enter. Employer policies, collective bargaining agreements, state law, and federal wage rules may affect actual pay.
Base pay and schedule
Base hourly rate
$
Regular hours / week
hrs
Shift differential
Example presets
Editable examples only—not industry standards. Use the rate in your employer policy, pay agreement, or collective bargaining agreement.
Hours receiving differential / week
hrs
Included within regular hours; not added as a second block of hours.
Differential percentage
%
Weeks worked per year
weeks
Differential per eligible hour
$4.20
$28.00 × 15%
Total hourly rate during eligible hours
$32.20
base + differential
Base weekly pay
$1,008.00
base × all regular hours
Weekly differential earned
$50.40
differential/hour × eligible hours
Estimated weekly gross pay
$1,058.40
base weekly + weekly differential
Annual differential earned
$2,520.00
weekly differential × weeks
Estimated annual gross pay
$52,920.00
weekly gross × weeks
Formulas used
Differential/hour = base rate × differential % Base weekly pay = base rate × regular hours Weekly differential = differential/hour × eligible hours Weekly gross = base weekly pay + weekly differential Annual gross = weekly gross × weeks worked Annual differential = weekly differential × weeks worked
Overtime note: Under the FLSA, certain shift differentials and other compensation may need to be included in an employee's regular rate for overtime purposes. This calculator does not determine overtime entitlement or calculate legally required overtime. See the U.S. Department of Labor's regular-rate guidance.
Methodology and limitations
Inputs. Base rate, regular hours, eligible differential hours, differential percentage or flat amount, and weeks worked are all user-controlled. The four named presets are editable examples only; they are not sourced industry averages or universal pay practices.
Model. Eligible differential hours are a subset of regular hours. Base pay is counted once for all regular hours, and the premium is added once for eligible hours. The estimate does not model overtime or decide which hours qualify for a differential.
FLSA regular rate. Certain shift differentials and other compensation may need to be included in an employee's regular rate for overtime purposes. What is included or excluded depends on the facts and the FLSA's rules. See the U.S. Department of Labor's Fact Sheet #56A: Regular Rate and Fact Sheet #23: Overtime Pay Requirements.
Last verified: August 27, 2026. NumPad estimates pay from the rate, hours, and differential you enter. Employer policies, collective bargaining agreements, state law, and federal wage rules may affect actual pay.
How the estimate treats eligible hours, example presets, and overtime.
A shift differential is extra hourly compensation an employer may pay for specified hours or assignments. It may be expressed as a percentage of base pay or as a flat dollar amount per eligible hour. The applicable rate and eligible hours come from the employer's policy, pay agreement, or collective bargaining agreement.