About ShiftPay

ShiftPay is a small set of free calculators for pay math: overtime under US and international rules, shift differentials for night or weekend work, and a combined gross-pay tool. Everything runs in your browser, so the numbers you type never leave your device.

We built ShiftPay because overtime rules are easy to miscalculate by hand — 40-hour weeks, 8-hour days, 1.5x and 2x rates, plus shift premiums all interact. Our tools follow the standard public formulas so the result matches a proper payslip.

ShiftPay is not a payroll provider or legal adviser. Thresholds and multipliers shown are based on public labor standards and may differ by employer, award, or update — always confirm with your employer or labor authority.