Calculators for law, finance, work and real estate
Use free online calculators for law, finance, employment and real estate.
Quickly calculate alimony, interest, salary, loan costs, transfer tax and other values you need before making a decision.
Calculator categories
Browse by topic
All calculators
Rent increase calculator
Rent increase and household impact
Post-divorce property division calculator
Post-divorce property split — estimated scenarios
Mortgage comparison calculator — instalment and total cost
Compare instalments, total cost and APRC for 2–3 offers
Mortgage payment vs rent — calculator
Compare loan instalment and rent over time
APR (RRSO) calculator — compare loan cost
Estimate APR and fuller loan cost
Lump‑sum tax calculator — rates & advances
Lump‑sum on revenue — quick simulation
Health contribution calculator — sole prop, flat tax
Health contribution 4.9% and 9% — sole proprietorship
Contract‑for‑work net calculator
Contract-for-work net amount
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Frequently asked questions
Answers to the most common questions about our legal and financial calculators.
Over 100 free calculators across 4 categories: law (alimony, reserved share, contractual penalties), finance (loans, taxes, lump-sum), work (salary, B2B, leave) and real estate (mortgage, PCC tax, deposit). Results are indicative and do not replace legal or financial advice.
Yes — all calculators are completely free and require no registration. You can use them without any limits.
Use the search bar at the top of the page, or browse one of the 4 categories: Law, Finance, Work, Real Estate. Each category is divided into topics — you can also browse calculators by topic.
No — results are indicative only and are intended for preliminary assessment. For legal, tax or financial matters, always consult a lawyer, tax advisor or notary.
Regularly — we update calculators with every change in regulations (including ZUS rates, tax thresholds, minimum wage). If you notice an outdated result, let us know via the contact form.
On prawopro.pl you can find a directory of law firms and accounting offices. Search by location and specialisation, then send an enquiry directly through the platform.