Outils gratuits pour investisseurs
Investor Tools & Calculators
A free suite of calculators for crypto and stocks — profit and loss, position sizing, risk and reward, compounding and more. They run entirely in your browser: no sign-up, no account, no data collection.
Crypto calculators
Stocks & trading
Comment en tirer le meilleur parti
A calculator is only as good as the thinking behind the inputs. A simple routine keeps the output meaningful:
- Choisissez le bon outil. Choose by the question you are asking — profit on a trade, the size of a position, or how a contribution compounds over time.
- Saisissez vos propres chiffres. Use figures from your situation. Where a tool asks for an expected return, treat it as a hypothetical, and try a cautious value as well as an optimistic one.
- Lisez le résultat comme une fourchette, pas une promesse. The output is an illustration of the maths, not a forecast. Change one input and watch how much it moves.
- Recoupez avec les données en direct. Sanity-check assumptions against real figures on the markets page, a coin or a stock.
New to a term in one of the tools? The glossary defines it quickly, and our guides explain the bigger concepts such as dollar-cost averaging and position sizing & risk.
Faites les calculs avant d'agir
Reading a live quote tells you where an asset is right now. These tools help you reason about what a decision would actually mean — the profit on a trade after fees, the right size for a position given your risk budget, the reward you are chasing relative to the risk you are taking, or the way a regular contribution compounds over years. Thinking in concrete numbers, before money is on the line, is one of the simplest habits that separates disciplined investors from impulsive ones.
A few of our tools — the crypto converter and the market cap calculator — use live cryptocurrency prices from CoinPaprika. Where a calculator asks you to supply an expected return or inflation rate, that figure is a hypothetical you choose: we never invent a forecast or imply a guaranteed outcome. Every result is a calculation based on the inputs you provide, for information and education only. None of it is investment advice, and markets can move against any assumption you make.
Prefer to start with the data? Browse live crypto prices, the stocks hub, or the combined markets overview.
Questions fréquentes
Les calculateurs sont-ils vraiment gratuits ?
Yes — every tool is free, with no account or sign-up. They run entirely in your browser, so the numbers you type are not sent to us or stored. More on that in our privacy policy.
Certains outils utilisent-ils des prix de marché en direct ?
A couple do. The crypto converter and market cap calculator pull live prices from CoinPaprika; the rest work entirely from the figures you enter.
D'où vient un rendement ou un taux de croissance attendu ?
From you. When a calculator asks for a rate of return or inflation figure, that is a hypothetical you choose — we never invent a forecast or imply a guaranteed outcome. The result is simply the maths on your inputs.
Les résultats constituent-ils un conseil en investissement ?
No. Every output is an illustration based on the numbers you supply, for information and education only — never a recommendation to buy or sell. Please read our disclaimer.