Open Calculators
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Workplace Productivity & Calendar Suite

Work & Everyday Time Calculators

Manage shift hours, gross payroll, and calendar milestones with precision. Built for employees, freelancers, and payroll administrators seeking private, instantaneous time accounting.

Weekly Timesheet & Payroll

Hours Worked Calculator

Track 7-day working hours with automatic unpaid break deductions, night shift crossing-midnight detection, and FLSA-compliant weekly or daily overtime rules (1.5x time-and-a-half or 2.0x double-time).

One-click CSV payroll timesheet export
Multi-currency support with exact decimal hour conversions
Duration, Age & Offset Planner

Date & Age Calculator

Calculate total calendar days and business days (Mon–Fri) between any two dates. Determine exact chronological age in years, months, and days with birthday countdowns, milestones, and target date offsets.

DST-safe calculation normalized to midday to eliminate 23h/25h shifts
Milestone tracker: 10,000 days, 1 billion seconds, 500,000 hours
Statutory Redundancy & Severance

Severance Pay Calculator

Calculate legal redundancy entitlements across 8 statutory jurisdictions, including South Korea 퇴직금, Dutch Transitievergoeding, German Abfindung, and UK Statutory Redundancy Pay.

South Korea 🇰🇷 (만 나이 통일법)

Korean Age Calculator

Compare International Age (만 나이), Calendar Year Age (연 나이), and Traditional Counting Age (세는 나이) following South Korea's 2023 Age Unification Act.

Statutory legal milestones: Alcohol/Tobacco, Conscription & School entry
South Korea 🇰🇷 (군 복무 계산기)

Korean Military Service Calculator

Track discharge countdown, service percentage, promotion dates, and 2024/2025 monthly military salary earnings for Army, Navy, Air Force, and Social Agents.

Statutory 18 to 21 month branch terms & Tomorrow Preparation savings
South Korea 🇰🇷 (주휴수당 계산기)

Korean Weekly Holiday Allowance

Calculate mandatory statutory paid rest day pay (주휴수당) under Article 55 of South Korea's Labor Standards Act for part-time and hourly workers working ≥ 15 hrs/week.

2024 (9,860 KRW) & 2025 (10,030 KRW) statutory minimum wage
Japan 🇯🇵 (年収の壁シミュレーター)

Japanese Part-Time Tax Wall (年収の壁)

Model take-home pay across Japan's 103万, 106万, 130万, and 150万円 barriers. Avoid take-home pay reversals caused by sudden social insurance enrolment.

Accounts for resident tax, income tax, and health/pension eligibility
Labor Law Compliance & Calendar Integrity

FLSA & Statutory Overtime Accounting

Under standard labor guidelines (such as the US Fair Labor Standards Act), non-exempt employees must receive overtime compensation at 1.5 times their regular hourly rate for all hours exceeding 40 in a designated workweek. Our engine handles multi-day aggregation without rounding truncation.

Gregorian Calendar & Leap Year Precision

Age calculation uses chronological borrowing arithmetic, borrowing the exact day length of preceding calendar months rather than assuming generic 30-day averages. Leap year boundaries (such as Feb 29) are strictly respected across all historical and future date horizons.