A collection of tools to dig yourself out of a financial hole
I built these calculators when I was figuring out my own finances. Compound interest changed everything for me — understanding how money grows over time turned panic into a plan. These are the tools that helped. Maybe they help you too.
The one that changed everything
Compound interest is the single most powerful concept in personal finance. It's how 200 euros a month becomes a quarter million. It's why starting now — even with almost nothing — matters more than starting later with more.
This calculator shows you the math. The rest is patience.
Open compound interest calculatorAll tools
Free, independent, no account needed.
Worth reading
How I dug myself out of a financial hole
In 2019 a client didn't pay me. That was the moment I realized I had no clue where my money went. Here's what happened next.
Why starting at 25 beats starting at 35 — even with half the money
The math behind compound interest explained with real numbers. Spoiler: time beats amount, every single time.
Snowball vs avalanche: which debt strategy actually works?
The mathematically optimal method isn't always the one you'll stick with. Here's how to pick.
About Quick Calculators
Quick Calculators is a collection of free, independent financial tools. No accounts, no ads, no data collection. Just calculators that help you understand your money better.
Every calculator on this site was built because I needed it myself. When I was trying to understand my mortgage options, figure out if I should pay off debt or start investing, or calculate what my pension would actually look like — I couldn't find tools that were simple, honest and free. So I built them.
What you'll find here
Ten financial calculators covering the topics that matter most: compound interest for understanding investment growth, a mortgage calculator for home buying, a loan calculator for comparing credit options, life insurance needs analysis, pension planning, a debt payoff planner, net salary calculations, tax-deductible allowance calculations, an inflation calculator, and a VAT calculator.
Built for real people
Financial calculators shouldn't require a finance degree. Each tool on this site gives you a clear answer to a specific question, with enough context to understand what the numbers mean. The accompanying articles explain the concepts in plain language with practical examples.
Available in 7 languages
Quick Calculators is available in English, Dutch, Spanish, French, Portuguese, German, and Chinese. Each translation includes locally relevant financial context and examples.