Part-Time Calculator: Hours, Salary, Vacation – plus 3-Model Comparison
Test several part-time variations (e.g., 28/30/32 hours) and compare them directly in a table. Perfect for negotiations, planning, and "what-if" scenarios.
Result
Annual Gross — • Hourly Wage (gross, rough) —
Model Comparison (up to 3 variants)
| Model | Hrs/Week | Ratio | Days/Week | Ø Hrs/Day | Mnthly Gross | Vac/Year | Action |
|---|---|---|---|---|---|---|---|
| A | — | — | — | — | — | — |
|
| B | — | — | — | — | — | — |
|
| C | — | — | — | — | — | — |
|
Explanation & FAQ
This Part-Time Calculator is built to give you a realistic picture of several part-time options in just a few seconds – without Excel, complex formulas, or installment games. You always start with your Full-Time values: weekly hours and monthly gross. This sets the baseline. Subsequently, you can enter your part-time target either as concrete weekly hours (e.g., 30 h) or as a percentage (e.g., 80%). The calculator automatically translates both into each other so you can argue "in hours" or "in percent" at any time during a conversation.
The real value lies in the combination of KPIs and comparison: Whether you are planning a 4-day week, want five shorter days, or are wavering between 28/30/32 hours – you immediately see how salary, daily working time, and vacation change. Additionally, you can enter up to three models (A–C) in parallel. This way, you can see at a glance which variant brings you more free time, which minimizes salary loss, and where days remain shortest. "Apply" sets a model directly as the active scenario – practical if you want to refine details above.
What is calculated:
(1) Part-time Ratio: Part-time hours ÷ Full-time hours. Example: 30 h at 40 h = 75%.
(2) Part-time Monthly Gross: Full-time gross × Ratio. Allowances are added optionally. If "Calculate allowances pro-rata" is active, they are reduced proportionally like the salary. If off, they remain as a fixed amount.
(3) Ø Day Length: Weekly hours ÷ Work days. This is the quick reality check to see if a 4-day week really relieves burden or just creates longer days.
(4) Vacation: Entitlement is converted via work days: Full-time vacation × (Part-time days ÷ Full-time days). Because companies round differently, you can test the rounding rule in the dropdown (exact, half days, whole days, always round up).
(5) Rough Hourly Wage: For monthly hours, 4.33 weeks per month are used (52 ÷ 12). This is a comparison value – billing may differ, but it is very useful for model decisions.
How to use this calculator most effectively: First set your baseline (full-time hours, full-time gross, vacation, work days). Then choose two to three typical options, such as 28/30/32 hours. Enter these into the model comparison and set different work days if needed (e.g., 28 h over 4 days vs. 32 h over 5 days). Afterward, you can apply the best model with a click and check fine adjustments above. In the end, copy the summary and have a clean conversation guide for HR or supervisors.
Data Protection & Note: The calculator runs entirely in your browser. No inputs are saved or transmitted. All results are planning values and do not replace individual legal, tax, or wage advice. Binding are the employment contract, collective agreement, and your employer's payroll.
1) Does the calculator calculate net income?
No. Net income depends heavily on tax class, health insurance, tax allowances, children, and location. For negotiation and planning, gross is the more stable comparison.
2) Why can I leave allowances "fixed"?
Because some benefits are paid as a flat rate (e.g., ticket/allowance), but others are linked to working time. The switch simulates both.
3) How do I best interpret the model table?
Look at three things: Monthly Gross (Budget), Ø Hours/Day (Workload), and Vacation/Year (Free time). Often, not just "fewer hours" but "better distribution" is decisive.
4) How is vacation calculated for 4 days?
Vacation is usually based on work days. With 5→4 days, you often receive 4/5 of the vacation. The exact rounding is determined by the employer.
5) Are 28/30/32 hours typical models?
Yes, these are very common steps. 32 h usually corresponds to 80% at 40 h full-time, 30 h = 75%, 28 h = 70%.
6) Does the hourly wage change with part-time?
With pro-rata payment, it usually remains similar. Deviations arise from flat rates, bonuses, surcharges, or rounding.
7) What does "Apply" mean in the model comparison?
The calculator applies the Hours/Week and Days/Week of the selected model as the current scenario, so you can continue working above and copy afterwards.
8) Is this legally binding?
No. It is a planning and comparison tool. Decisive are contract, tariff, and your employer's payroll.
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