Calk24 — Calculators Germany

Konstantin Iakovlev

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About this app

Calk24.de — Your comprehensive calculator portal for Germany with 227 free online calculators in 15 categories.

Whether gross-net salary, income tax, loan payments or BMI — all calculations are based on current German values for 2025/2026 and run entirely locally on your device. No data is transmitted.

TAXES & DEDUCTIONS
- Gross-Net calculator with all tax classes (I–VI)
- Income tax per Section 32a EStG 2026
- Wage tax, church tax, solidarity surcharge
- Trade tax, property tax, vehicle tax
- Capital gains tax, inheritance tax, gift tax
- Tax class comparison, tax optimization

FINANCE & LOANS
- Loan calculator, amortization, mortgage
- Construction financing, real estate
- Interest calculator, savings plan, ETF savings
- Inflation calculator, ROI calculator
- Investment tax prepayment, default interest

SALARY & WORK
- Hourly wage calculator, part-time calculator
- Minimum wage 2026 (13.90 EUR/hour)
- Short-time work benefits, parental allowance
- Working days and working time calculator
- Salary increase, severance pay calculator

SOCIAL & LEGAL
- Child benefit 2026 (259 EUR/child)
- Citizens' income / basic security
- BAfoeg calculator, housing benefit
- Child support (Duesseldorf Table 2026)
- Care allowance by care level
- Wage garnishment calculator

HEALTH
- BMI calculator (adults & children)
- Calorie calculator, basal metabolic rate
- Heart rate zones, sleep calculator
- Ovulation calculator

MATHEMATICS
- Percentage calculator, rule of three
- Fraction calculator, mean value calculator
- Triangle, volume, square meter
- Roman numerals, number generator

REAL ESTATE
- Home purchase ancillary costs
- Real estate transfer tax (all federal states)
- Buy vs rent, rental deposit calculator
- Photovoltaics, heat pump

MORE CATEGORIES
- Auto & mobility, energy, daily life, lifestyle

KEY FEATURES
- All 227 calculators completely free
- No registration required
- Fully available offline — works without internet connection
- Privacy-friendly: all calculations run locally on your device
- Current values for 2025/2026
- 4 languages: German, English, Turkish, Russian
- Dark mode available

DATA SOURCES
All calculations are based on official publications from the following institutions:
- Federal Ministry of Finance (BMF) — https://www.bundesfinanzministerium.de
- Federal Ministry of Labour and Social Affairs (BMAS) — https://www.bmas.de
- Deutsche Bundesbank — https://www.bundesbank.de
- Federal Ministry of Health (BMG) — https://www.bundesgesundheitsministerium.de
- Higher Regional Court Duesseldorf (Duesseldorf Table) — https://www.olg-duesseldorf.nrw.de
- Standing Conference of Education Ministers (KMK, school holidays) — https://www.kmk.org

Disclaimer: Calk24 is an independent, private project and is not affiliated with any governmental authority or institution of the Federal Republic of Germany. This app is not an official government product. Results are for informational purposes only and do not replace professional tax, legal, or financial advice.